AnswersHSPHY Physics Sem 1 26-27Centripetal Acceleration

Lesson 4: Centripetal Acceleration Answers

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1
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0.0250.0372.18.0

A
0.025
B
0.037
C
2.1
D
8.0
2
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A car drives toward the right over the top of a hill, as shown below.

Question illustration
A
W
B
X
C
Y
D
Z
3

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.
4

When is an object moving in uniform circular motion?

A
when it speeds up around a curve
B
when its tangential speed is constant
C
when it has no net force acting on it
D
when its acceleration is tangent to a circle
5

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
6

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.
7

[BLANK]

A
0.0051
B
0.43
C
25
D
84
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

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.
10

The tip of a pinwheel is 0.24 m from the center. The pinwheel spins 5 times each second. What is the tangential speed of the tip of the pinwheel?

A
0.30 m/s
B
1.2 m/s
C
1.5 m/s
D
7.5 m/s

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