AnswersDISD CR Physics 2020-2021Universal Law of Gravitation

Circular Motion Answers

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1
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In which situation would a space probe most likely experience centripetal acceleration?

A
as it revolves around a planet
B
as it flies straight past a moon
C
as it is pulled in a line toward the Sun
D
as it lifts off from Earth
2
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A
0.025
B
0.037
C
2.1
D
8.0
3

A police officer draws a sketch of the scene of an accident, as shown.

Question illustration
A
W
B
X
C
Y
D
Z
4

Which is a characteristic of centripetal acceleration?

A
It is directed outward from the center of a circle.
B
It is directed inward, toward the center of a circle.
C
It results in an object moving faster.
D
It results in an object moving slower.
5

Which situation during a basketball game involves centripetal acceleration?

A
The official tosses the ball up for the opening tip-off.
B
A player passes the ball to another player.
C
The basketball bounces off the backboard.
D
A player spins a basketball on his finger.
6

A spinning top rotates so that its edge turns at a constant speed of 0.63 m/s. If the top has a radius of 0.10 m, what is the centripetal acceleration of the edge of the top?

A
0.016 m/s2
B
0.73 m/s2
C
4.0 m/s2
D
6.3 m/s2
7

Juan and Kuri are on a carousel. Juan is closer to the center of the carousel than Kuri. Which statement describes their tangential speeds?

A
Juan and Kuri move the same distance in one revolution, but Juan completes the revolution in less time and has a higher speed.
B
Juan and Kuri complete one revolution in the same time, but Juan travels a shorter distance and has a lower speed.
C
Juan moves a shorter distance in less time than Kuri, but their speeds are the same.
D
Juan and Kuri complete one revolution in the same time, so they have the same speed.
8

How does an object’s motion change as a result of centripetal acceleration?

A
The speed decreases in the same direction.
B
The speed increases in the same direction.
C
The direction changes along with the speed.
D
The direction changes but not the speed.
9

The tip of a fan blade is 0.61 m from the center of the fan. The fan turns at a constant speed and completes 2 rotations every 1.0 s.

A
6.0 m/s2
B
48 m/s2
C
53 m/s2
D
96 m/s2

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