need for (more) speed. of course not every object is going to travel the same velocity all the time
DESCRIPTION
ACCELERATION is the rate of change in VELOCITY.TRANSCRIPT
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Need for (More) Speed
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Of course not every object is going to travel the same VELOCITY all the
time.
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ACCELERATION is the rate of change in VELOCITY.
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There are three ways to acceleratesince there are three ways to CHANGE velocity.
1. INCREASE Velocity (SPEED UP)2. DECREASE Velocity (SLOW DOWN)3. Change DIRECTION (TURN)
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1. Which of the following experiences a greater acceleration
- a plane that goes from 1000 km/hr to 1005 km/hr over 10
seconds or a skateboard that goes from rest to 5 km/hr in 1 second?
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2. Can a car traveling north have acceleration towards the south?
Give an example.
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3. Give an example of an object moving with a constant speed but
a changing velocity.
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4. Give an example of an object undergoing acceleration, but
maintaining a constant speed.
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5. A car initially traveling 25 m/s undergoes a constant acceleration of 2.5 m/s2 for 2 seconds. What is
the car’s final speed?
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6. A cheetah can accelerate at a rate of 4.0 m/s2. How long would
it take the cheetah to reach its top speed of 32.0 m/s if it begins from
rest?
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7. A golf ball rolls up a hill toward a miniature-golf hole. Assume that the direction toward the hole is positive
.
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If the golf ball starts with a speed of 2.0 m/s and slows at a constant rate of 0.50 m/s2, what
is its velocity after 2.0 s?