Section 6.2
Circular Motion
Practice Test
1.
If an object moves in a circle at steady speed it is in __________.
a.
projectile motion
b.
uniform circular motion
c.
equilibrium
d.
torque
Hint
2.
The acceleration of an object in uniform circular motion is called __________.
a.
centripetal acceleration
b.
equilibrium
c.
torque
d.
range
Hint
3.
A carnival ride has a 3.0-m radius and rotates once every 1.7 s. What is the speed of the rider?
a.
9.4 m/s
b.
11 m/s
c.
5 m/s
d.
3.4 m/s
Hint
4.
In Figure 6-7, if the mass of the hammer is 7.26 kg, its center is 0.50 m from the thrower, and it is moving at a speed of 1.5 m/s, what is the force of the chain on the thrower's hands?
a.
22 N, inward
b.
33 N, outward
c.
33 N, inward
d.
22 N, outward
Hint
5.
In Figure 6-7, if the mass of the hammer is 7.26 kg, its center is 0.50 m from the thrower, and it is moving at a speed of 1.5 m/s, what is the tension in the chain?
a.
4.5 N
b.
33 N
c.
3.0 N
d.
22 N
Hint
6.
A carnival ride has a 3.0-m radius and rotates once every 1.7 s. Find the centripetal acceleration of a rider.
a.
41 m/s
2
b.
11 m/s
2
c.
82 m/s
2
d.
98 m/s
2
Hint
7.
In Figure 6-7, if the mass of the hammer is 7.26 kg, its center is 0.50 m from the thrower, and it is moving at a speed of 1.5 m/s, what is its centripetal acceleration?
a.
22 m/s
2
b.
33 m/s
2
c.
4.5 m/s
2
d.
3.0 m/s
2
Hint
