Free Fall Review

If King Kong falls off a roof, which velocity is 0?

• Final velocity

• Initial velocity

What is velocity at the very top of an object thrown upwards?

• Depends on the problem

• 0

• Impossible to answer

• 9.8

An object in free fall is acted on only by the force of gravity

• True

• False

Tags

NGSS.HS-PS2-4

A very massive object will free fall at the same rate of acceleration as a less massive object

• True

• False

Tags

NGSS.HS-PS2-1

When a rock is dropped, it will accelerate downward at a rate of 9.8 m/s^2. If the same rock is thrown downward (instead of being dropped from rest), its acceleration will be ___.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A baseball catcher throws a ball straight up and catches it in the same spot. A what point in the balls trajectory does it experience a velocity of zero.

• Midway on the way up

• At its peak height

• The instant it leaves the catchers hand

• The instant before it arrives in the catchers mitt

An automobile with an initial speed of 4.30 m/s accelerates uniformly at the rate of 3.0 m/s².  Find the final speed after 5.0 s.

• v_f = v₀ + at

Tags

NGSS.HS-PS2-1

A car traveling initially at +7.0 m/s accelerates uniformly at the rate of +0.80 m/s² for a distance of 245 m. What is its velocity at the end of the acceleration?

• v_f = v₀ + at

Tags

NGSS.HS-PS2-1

A car accelerates uniformly in a straight line from rest at the rate of 2.3 m/s². How long does it take the car to travel 55 m?

• v_f = v₀ + at

Tags

NGSS.HS-PS2-1

Turner’s treadmill runs with a velocity of -1.2 m/s and speeds up at regular intervals during a half-hour workout.  After 25 min (1500 s), the treadmill has a velocity of -6.5 m/s.  What is the average acceleration of the treadmill during this period?

• v_f = v₀ + at

Tags

NGSS.HS-PS2-1