Do Now (12/7):

•Make a list of concepts you need to know for your test tomorrow.

Ms. Timson’s

Physics Review to Conquer Forces and Newton’s Laws

Rules of the Game• There will be tribes, as divided by the teacher• For each problem which appears on the slide, the tribe will be able to work

together to vote on one answer given only the time which will be written on the slide.

• Tribes cast their answer using their voting cards only in the time allowed.• Each team with a correct answer is allowed to cast one vote to remove

another tribe from the island. The teacher will have each tribe cast their vote simultaneously by writing the color of the tribe they are voting for on their white board. The teacher will then remove tribes from the island.

• The teacher will track which tribes are in and which tribes are out of the game with signs on the board.

• If a tribe is voted out, they can reenter the game by answering the next question correctly to reenter. They will NOT receive a vote for that question but must wait until the next question.

• Winning tribes will be those still on the island at the end of the game.• ***The teacher will be the final judge of any conflicts or confusions – and

remember, be respectful and be honest!

The acceleration of an object is ______ its mass.

• a) directly proportional to the square of• b) inversely proportional to the square of• c) directly proportional to• d) inversely proportional to

20 seconds

• When the net force acting on an object is zero, the object will stay at rest or at constant velocity.This statement corresponds to Newton's _____ law.

a)1st b)2nd c) 3rd d) 4th

10 seconds

• Calculate the net force a)13N b) 3 N c) -13 N d) -3 N

30 seconds

8 N 5 N

• Calculate the acceleration if the mass is 1.5 kg a) 3 m/s2 b) 2 m/s2 c) 4.5 m/s2 d) 1.5 m/s2

40 seconds

8 N 5 N

This object is: a)accelerating b)In equilibrium c) unbalanced

40 seconds

8 N 8 N

A ball is rolling to a stop on a pool table. What are the forces acting on the ball?

a)Applied force, friction, gravity, normal force b)friction, gravity, normal force c) gravity, normal force d) Applied force, gravity, normal force

40 seconds

• If you throw a bowling ball while standing on a skateboard, you will roll backwards.This statement corresponds to Newton's _____ law. a) 1st b) 2nd c) 3rd d) 4th

30 seconds

• 41) When unbalanced forces act upon a object, the object will accelerate in the direction of the force.This statement corresponds to Newton's _____ law. a) 1st b) 2nd c) 3rd d) 4th

1 minute

• If you’re standing (facing forward) on a forward-moving flat wagon that stops suddenly, you will:

a)move backwardsb)b) move forwardsc) remain stationary with respect to the

wagon 30 seconds

The acceleration due to gravity:• a) is constant for all planets• b) varies slightly over the Earth's surface• c) is constant over the Earth's surface

10 seconds

• The SI unit for acceleration is: • a) Newton • b) kgm/s2 • c) m/s • d) m/s2

10 seconds

One Newton is equivalent to: a)1 kgm/s2 b) b) 1 kgm2/s2 c) c) 1 m/s2 d)d) - 9.8 m/s2

15 seconds

If a quarter & a feather were dropped in a vacuum (no air resistance):

• a) the quarter reaches the bottom first• c) the feather reaches the bottom first• b) both reach the bottom at the same time• d) the quarter drops twice as fast as the

feather2 minutes

• The net force that is required to give a mass of 60-kg an acceleration of 8 m/sec2 is ____

• A) 7.5 N • B) 9.8 N • C) 480 N • D) 950 N

1 minute

vector representing the sum of two or more vectors is called the _______ .

• A) addend • B) component • C) equilibrant • D) resultant

•30 s

If Fnet , the vector sum of all forces acting on an object, is not equal to zero then the object _____ .

• A) has no inertia • B) has uniform velocity • C) is in equilibrium • D) will accelerate

20 seconds

The slope of a position–time graph is equal to:

A. The distance B. The position C. The accelerationD. The velocity

20 seconds

• In a friction experiment, a horizontal force of 25 N was needed to keep a 15 kg object sliding at constant speed over a horizontal surface.– Calculate the coefficient of friction m.– What applied force is required to accelerate the

object at 2.0 m/s2?

20 seconds

Congratulations!Good luck tomorrow!

I know you can conquer your test