Free fall

Free fall

Multiple Choice

If a ball is thrown up and lands at the same location, what was its acceleration?

• -10 m/s² on the way up and +10 m/s² on the way down.

• -10 m/s² the entire time.

• +10 m/s² on the way up and -10 m/s² on the way down.

Multiple Choice

Free fall is

• moving through the air under the influence of the force of gravity only.

• not paying for a fall.

• clothing sale with lots of orange & brown clothes.

• a feather dropped from an airplane.

Multiple Choice

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

Multiple Choice

The state that exists when the only force acting on an object is gravity is called

• free fall

• inertia

• acceleration

• momentum

Multiple Choice

Heavier objects free fall faster than lighter objects.(in the absence of the air resistance)

• True

• False

Multiple Choice

Do free falling objects move at constant velocity or do they accelerate?

• Falling objects accelerate at -9.8 m/s²
• Falling object move at constant velocity
• Falling objects accelerate at 100 m/s²
• It depends on the mass: heavy objects accelerate, light objects do not

Multiple Choice

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 in a vacuum.

Multiple Choice

When there is no air resistance, objects of different masses dropped from rest

• fall with equal accelerations and with equal displacements.
• fall with different accelerations and with different displacements.
• fall with equal accelerations and with different displacements.
• fall with different accelerations and with equal displacements.

Multiple Choice

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.

Multiple Choice

In a normal environment, why does a bowling ball and feather hit the ground at different times when dropped from the same height?

• They don't; they hit the ground at the same time.
• One is more dense than the other.
• One is heavier than the other.
• Air resistance 

Multiple Choice

What is the 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