Physics Quest Review (Test 2)

You drop a bowling ball from the top of a building, what is the initial velocity of the ball. (this is not a course on safety, but physics)

• 9.8 m/s²

• 9.9 m/s

• 0 m/s²

• 0 m/s

What is acceleration of an object traveling upward during free fall?

• +9.8m/s²

• -9.8m/s²

• 9.8 m/s

• -9.8m/s

When an object falls in physics world, what happens?

• It accelerates at a constant rate until it hits the ground

• It accelerates at a non-constant rate until it hits the ground

• It accelerates at a constant rate until it reaches terminal velocity

• It accelerates at a non-constant rate until it reaches terminal velocity

Which of the following statements applies to the motion of a ball rising and then falling in free fall?
I. The ball has constant acceleration as it moves upward.
II. The ball has constant acceleration at the top of its path.

III. The ball has constant acceleration as it moves downward.

• I only

• III only

• I and III

• I, II, and III

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.

In the absence of air resistance, objects fall at constant 

• speed

• velocity

• acceleration

• distances each successive second.

A ball is thrown upwards and caught when it comes back down. 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.

A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always 

• in the direction of motion.

• opposite its velocity.

• directed downward.

• directed upward.

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

• 6m/s

• 30m/s

• 60m/s

• 300m/s

A ball is thrown into the air. At the highest point, the ball has zero velocity and zero acceleration.

• True

• False