# Spring Physics Exam 2 #'s 11-15

5 Questions | Attempts: 239
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11. In the absence of air resistance, the path of a projectile is a(n)
• A.

A. parabola

• B.

B. arc

• C.

C. polygon

• D.

D. semicircle

• 2.
12. The motion of a projectile in free fall is characterized by
• A.

A. ax = ay = -g.

• B.

B. ax = constant and vy = constant.

• C.

C. vx = constant and ay = g.

• D.

D. vx = constant and vy = constant.

• 3.
13. For an object to be a projectile, it must be in free fall and its initial velocity must
• A.

A. have a horizontal component.

• B.

B. have both a vertical and a horizontal component.

• C.

C. have either a vertical or a horizontal component.

• D.

D. start from rest.

• 4.
14. A baby drops a ball from her hand resting on the serving tray of her high chair. Simultaneously, she knocks another ball from the same tray. Which of the following statements are true?   I. Both balls strike the ground at the same time.II. The dropped ball reaches the ground first.III. The knocked ball reaches the ground first.
• A.

A. I only

• B.

b. II only

• C.

c. III only

• D.

d. None are true

• 5.
15. Which of the following is an example of projectile motion?
• A.

a. a jet lifting off a runway

• B.

b. a baseball being thrown

• C.

c. dropping an aluminum can into the recycling bin

• D.

d. a space shuttle orbiting Earth

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