physical science spring 08 review
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Physical Science Spring 08 Review. Forces and Motion. Forces and Motion. 1. Speed is the rate of change in position a change in velocity a push or a pull change in location. Forces and Motion. 1. Speed is the rate of change in position a change in velocity a push or a pull - PowerPoint PPT PresentationTRANSCRIPT
Forces and Motion
Forces and Motion1. Speed isa.the rate of change in positionb.a change in velocityc.a push or a pulld.change in location.
Forces and Motion1. Speed is
a.the rate of change in positionb.a change in velocityc.a push or a pulld.change in location.
Forces and Motion2. Which term indicates both speed and direction?
a.magnitudeb.displacementc.momentumd.velocity
Forces and Motion2. Which term indicates both speed and direction?
a.magnitudeb.displacementc.momentumd.velocity
Forces and Motion3. Which is the proper equation for
find the speed of an object?
a. F = MA c. v = d x tb. v = d/t d. v = t/d
Forces and Motion3. Which is the proper equation for
find the speed of an object?
a. F = MA c. v = d x tb. v = d/t d. v = t/d
Forces and Motion4. Any change in speed or direction is
referred to as?
a. acceleration
c. momentum
b. displacement
d. velocity
Forces and Motion4. Any change in speed or direction is
referred to as?
a. acceleration
c. momentum
b. displacement
d. velocity
Forces and Motion5. What is a force?
a. change in speed over time
b. the tendency to resist change in motion
c. a push or pull
d. apparent weightlessness
Forces and Motion5. What is a force?
a. change in speed over time
b. the tendency to resist change in motion
c. a push or pull
d. apparent weightlessness
Forces and Motion6. Forces that are equal in size and
opposite in direction are
a. balanced forces
b. equilateral forces
c. net forces
d. unbalanced forces
Forces and Motion6. Forces that are equal in size and
opposite in direction are
a. balanced forces
b. equilateral forces
c. net forces
d. unbalanced forces
Forces and Motion7. Which of the following will result if
balanced forces act on an object?
a. the object will accelerate
b. the object will slow down
c. the object’s velocity will not change
d. centripetal force will increase
Forces and Motion7. Which of the following will result if
balanced forces act on an object?
a. the object will accelerate
b. the object will slow down
c. the object’s velocity will not change
d. centripetal force will increase
Forces and Motion8. What is another term for an
unbalanced force, a force that is NOT equal in size or opposite in direction? a. balanced forceb. gravitational forcec. strong forced. net force
Forces and Motion8. What is another term for an
unbalanced force, a force that is NOT equal in size or opposite in direction? a. balanced forceb. gravitational forcec. strong forced. net force
Forces and Motion9. What is the result of a net force
acting on an object?
a. the object will accelerate
b. the object remain motionless
c. the object’s velocity will not change
d. inertia is greater than net forces
Forces and Motion9. What is the result of a net force
acting on an object?
a. the object will accelerate
b. the object remain motionless
c. the object’s velocity will not change
d. inertia is greater than net forces
Forces and Motion10. An objects tendency to resist
changes in motion is called ___________? a. accelerationb. frictionc. inertiad. unbalanced force
Forces and Motion10. An objects tendency to resist
changes in motion is called ___________? a. accelerationb. frictionc. inertiad. unbalanced force
Forces and MotionAn object that is only acting under the
influence of gravity is ___________
a. decelerating
b. in free fall
c. stationary
d. weightless
Forces and MotionAn object that is only acting under the
influence of gravity is ___________
a. decelerating
b. in free fall
c. stationary
d. weightless
Forces and MotionFor every force there is an equal and
opposite reaction force is
a. Newton's 1st Law of Motion
b. Newton's 2nd of Motion
c. Newton's 3rd Law of Motion
d. Newton's 4th Law of Motion
Forces and MotionFor every force there is an equal and
opposite reaction force is
a. Newton's 1st Law of Motion
b. Newton's 2nd of Motion
c. Newton's 3rd Law of Motion
d. Newton's 4th Law of Motion
Forces and MotionAn object at in motion remains in motion
unless acted upon by an unbalanced force is which of Newtons laws?a. Newton's 1st Law of Motion
b. Newton's 2nd of Motion
c. Newton's 3rd Law of Motion
d. Newton's 4th Law of Motion
Forces and MotionAn object at in motion remains in motion
unless acted upon by an unbalanced force is which of Newtons laws?a. Newton's 1st Law of Motion
b. Newton's 2nd of Motion
c. Newton's 3rd Law of Motion
d. Newton's 4th Law of Motion
Forces and MotionThe total momentum of objects before
a collision equals the total momentum after a collision is described by which law?
a. Law of Conservation of Mass
b. Law of Conservation of Momentum
c. Newtons 4th Law of Motion
Forces and MotionThe total momentum of objects before
a collision equals the total momentum after a collision is described by which law?
a. Law of Conservation of Mass
b. Law of Conservation of Momentum
c. Newtons 4th Law of Motion
Forces and MotionWhich of Newton’s laws describes the
relationship between force, mass and acceleration?a. Newton's 1st Law of Motionb. Newton's 2nd of Motionc. Newton's 3rd Law of Motiond. Newton's 4th Law of Motion
Forces and MotionWhich of Newton’s laws describes the
relationship between force, mass and acceleration?a. Newton's 1st Law of Motionb. Newton's 2nd of Motionc. Newton's 3rd Law of Motiond. Newton's 4th Law of Motion
Forces and MotionIf a projectile was fired in space it will
continue to travel at a constant velocity until it hits something or is pulled into a gravity field. Which of Newton’s Law’s does this demonstrate?a. Newton's 1st Law of Motionb. Newton's 2nd of Motionc. Newton's 3rd Law of Motion
Forces and MotionIf a projectile was fired in space it will
continue to travel at a constant velocity until it hits something or is pulled into a gravity field. Which of Newton’s Law’s does this demonstrate?a. Newton's 1st Law of Motionb. Newton's 2nd of Motionc. Newton's 3rd Law of Motion
Forces and MotionA student leans against the wall.
Neither the wall nor the student move. This is an example of which of Newton’s Laws?a. Newton's 1st Law of Motionb. Newton's 2nd of Motionc. Newton's 3rd Law of Motion
Forces and MotionA student leand against the wall.
Neither the wall nor the student move. This is an example of which of Newton’s Laws?a. Newton's 1st Law of Motionb. Newton's 2nd of Motionc. Newton's 3rd Law of Motion
Forces and MotionA player strikes a ball with a bat and
the ball changes direction and sails into the outfield. This is an example of which of Newton’s Laws?a. Newton's 1st Law of Motionb. Newton's 2nd of Motionc. Newton's 3rd Law of Motion
Forces and MotionA player strikes a ball with a bat and
the ball changes direction and sails into the outfield. This is an example of which of Newton’s Laws?a. Newton's 1st Law of Motionb. Newton's 2nd of Motionc. Newton's 3rd Law of Motion
Forces and MotionA bowling ball hits some pins. Which
is true of the momentum after the collision?a. The total momentum is lessb. The total momentum is greaterc. The total momentum is equald. None of the above
Forces and MotionA bowling ball hits some pins. Which
is true of the momentum after the collision?a. The total momentum is lessb. The total momentum is greaterc. The total momentum is equald. None of the above
Forces and MotionWhich of the following is also called
the Law of Inertia?a. Newton's 1st Law of Motionb. Newton's 2nd of Motionc. Newton's 3rd Law of Motiond. Newton’s 4th Law of Inertia
Forces and MotionWhich of the following is also called
the Law of Inertia?a. Newton's 1st Law of Motionb. Newton's 2nd of Motionc. Newton's 3rd Law of Motiond. Newton’s 4th Law of Inertia
Forces and MotionRank the following in order of
increasing inertia. a. Tennis ballb. Bowling ballc. Marbled. Wrecking ball
Forces and MotionRank the following in order of
increasing inertia. Marble -> tennis ball -> bowling ball --> wrecking ball
Forces and MotionWhat equation is related to Newton’s
Second Law?a. s = d/t
b. a = (vf – vi)/tc. F = mad. p = mv
Forces and MotionWhat equation is related to Newton’s
Second Law?a. s = d/t
b. a = (vf – vi)/tc. F = mad. p = mv
Forces and MotionAn action force of 450 N pushes on a
wall to the left, what is the reaction force?
a. 450 N upb. 225 N leftc. 225 N rightd. 450 N right
Forces and MotionAn action force of 450 N pushes on a
wall to the left, what is the reaction force?
a. 450 N upb. 225 N leftc. 225 N rightd. 450 N right
Forces and MotionThe gravitational force between two
objects depends on what two things?a. Sizeb. Distance between the objectsc. Massd. Velocitye. Momentum
Forces and MotionThe gravitational force between two
objects depends on what two things?a. Sizeb. Distance between the objectsc. Massd. Velocitye. Momentum
Forces and MotionWhat is the gravitational acceleration
constant on earth?a. 9.8 m/sb. 98 m/sc. 9.8 m/s2
d. 982 mph
Forces and MotionWhat is the gravitational acceleration
constant on earth?a. 9.8 m/sb. 98 m/sc. 9.8 m/s2
d. 982 mph
Forces and MotionMomentum depends on what two
things?a. densityb. gravityc. massd. volumee. velocity
Forces and MotionMomentum depends on what two
things?a. densityb. gravityc. massd. volumee. velocity
Forces and MotionWhich has more momentum a semi
truck traveling at 10 m/s or a small car traveling at the same speed? Why?
Forces and MotionWhich has more momentum a semi
truck traveling at 10 m/s or a small car traveling at the same speed?
A semi truck because it has more mass.
Forces and MotionDescribe the motion of an object
whose distance vs. time graph looks like this.
Forces and MotionThe object is standing still. Time is
passing but distance is not increasing.
Forces and MotionDescribe the motion of the object that
produces the graph below.
Forces and MotionMotion at a constant speed. The line is
straight so you know there is no acceleration.
Forces and MotionDescribe the motion of the object that
produces the graph below.
Forces and MotionThe object is experiencing positive
acceleration; it is speeding up.
Forces and MotionDescribe and draw the path of a dart
shot from a dart gun at earth’s surface.
Forces and MotionDescribe and draw the path of a dart
shot from a dart gun at earth’s surface.
Drop of a Bullet
Forces and MotionExplain why a hammer falls faster than
a feather in the classroom?
Drop of a Bullet
Forces and MotionExplain why a hammer falls faster than
a feather in the classroom?The feather has greater surface area
and therefore more air resistance than the hammer.
Drop of a Bullet
Forces and MotionSo why do the feather and hammer hit
the ground at the same time on the moon?
Drop of a Bullet
Forces and MotionSo why do the feather and hammer hit
the ground at the same time on the moon?
There is no air on the moon to provide the upward force of air resistance. Gravitational acceleration is constant.
Forces and MotionCalculate the average speed of a mail
truck that moves 80m in 20s.
Forces and MotionCalculate the average speed of a mail
truck that moves 80m in 20s.
v = d/t = 80 m/20 s = 4 m/s
Forces and MotionWhich is the correct equation for
calculating the acceleration of an object from its change in speed?
a. s = d/t
b. a = (vf – vi)/tc. a = F/md. p = mv
Forces and MotionWhich is the correct equation for
calculating the acceleration of an object from its change in speed?
a. s = d/t
b. a = (vf – vi)/tc. a = F/m this one is if you know mass and Force
d. p = mv
Forces and MotionMary coasts her bicycle down the
hill. At one point, she is traveling at 5.0 m/s. 10 s later, her speed is 15 m/s. What is her acceleration?
Forces and MotionMary coasts her bicycle down the
hill. At one point, she is traveling at 5.0 m/s. 10 s later, her speed is 15 m/s. What is her acceleration?
a = (vf – vi)/t = (15m/s – 5m/s) = 1 m/s2
10 s
Forces and MotionA 30 kg object accelerates at a rate of 5
m/s2. How much force was used to cause this acceleration?
Forces and MotionA 30 kg object accelerates at a rate of 5
m/s2. How much force was used to cause this acceleration?
Force = mass x accelerationF = maF = 30kg x 5 m/s2 = 150Nremember a kgm/s2 is a Newton (N).
Forces and MotionA 300 N-force accelerates an object by 6
m/s2. What is the mass of the object?
Forces and MotionA 300 N-force accelerates an object by 6
m/s2. What is the mass of the object?F = ma300N = m x 6 m/s2
300N/ 6 m/s2 = 50 kg
Forces and MotionWhat is the result if you put an object in
water that is MORE dense than water?a. it floatsb. it sinksc. it moves to the middle of the water
Drop of a Bullet
Forces and MotionWhat is the result if you put an object in
water that is MORE dense than water?a. it floatsb. it sinksc. it moves to the middle of the water
Drop of a Bullet
Forces and MotionWhat is the equation for calculating
density?
Forces and MotionWhat is the equation for calculating
density?
D = m/Vdensity = mass/volume
Forces and MotionWhat is the density of an object with a
mass of 6 g and 4 ml?
Drop of a Bullet
Forces and MotionWhat is the density of an object with a
mass of 6 g and 4 ml?
D = m/V1.5 g/ml = 6 g / 4 ml
Forces and MotionIf water has a density of 1 g/ml, will a
substance with a density of 2.4 g/ml sink or float in water? Why?
Forces and MotionIf water has a density of 1 g/ml, will a
substance with a density of 2.4 g/ml sink or float in water? Why?
The substance will sink because it is more dense than water.
Forces and MotionWhich objects will sink and which will float
in pure water (density of 1 g/mL)?a.a 6 gram object with a volume of 4 mLb.a 3 gram object with a volume of 2 mLc.a 4 gram object with a volume of 6 mLd.a 16 gram object with a vol. of 20 mL
Forces and MotionWhich objects will sink and which will float
in pure water (density of 1 g/mL)?a.a 6 gram object with a volume of 4 mL sinkb.a 3 gram object with a volume of 2 mL sinkc.a 4 gram object with a volume of 6 mL floatd.a 16 gram object with a vol. of 20 mL float
Hint: If the bottom number is bigger it floats!D = m/V