Free Fall

What is the acceleration of a ball that is dropped off the side of a cliff after 1,2,3,4,5 seconds? (assume g is rounded to 10 m/s²)

• 5,10,15, 20, 25 m/s²

• 10, 20, 30, 40, 50 m/s²

• 5, 20, 45, 80, 125 m/s²

• 10,10,10,10,10 m/s²

What is the vertical velocity of a ball that has been dropped off a cliff after 1 , 2, 3, 4, and 5 seconds? (assume g is rounded to 10 m/s²)?.

• 10, 20, 30, 40, 50 m/s

• 5, 10, 15, 20, 25 m/s

• 5, 20, 45, 80,125 m

• 10,10,10,10,10 m/s

The change in velocity in a given time period is?

• initial velocity

• final velocity

• acceleration

• displacement

Which would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?

• the feather

• the metal bolt

• They would hit the ground at the same time.

• They would be suspended (floating) in a vacuum.

Which would fall with greater acceleration in a vacuum—a leaf or a stone?

• the leaf
• the stone
• They would accelerate at the same rate.
• It is difficult to determine without more information.

If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by 

• about 5 m/s.
• about 10 m/s.
• about 15 m/s.
• a rate that depends on its initial speed.

If you throw a baseball straight up, what is its vertical velocity at the highest point?

• 9.8 m/s²

• 9.8 m/s

• 0 m/s²

• 0 m/s

A ball is thrown upwards and caught when it comes back down at the same height. In the absence of air resistance, the speed of the ball when caught would be

• less than the speed it had when thrown upwards.

• more than the speed it had when thrown upwards.

• the same as the speed it had when thrown upwards.

• need more information to determine.

A freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about:

• 6m/s

• 36m/s

• 60m/s

• 12m/s

A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to the ground

• the acceleration increases

• the acceleration decreases

• the acceleration remains constant