WorksheetsRotational motion
Total questions: 18
Worksheet time: 9mins
2600 rev/min is equivalent to which of the following?
2600 rad/s
43.3 rad/s
273 rad/s
60 rad/s
A 0.12-m-radius grinding wheel takes 5.5 s to speed up from 2.0 rad/s to 11.0 rad/s. What is the wheel's average angular acceleration?
9.6 rad/s2
4.8 rad/s2
3.1 rad/s2
1.6 rad/s2
A 0.30m radius automobile tire rotates how many rad after starting from rest and accelerating at a constant 2.0 rad/s2 over a 5.0 s interval?
25 rad
12.5 rad
2 rad
0.5 rad
A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed?
3.2 rad/s
26 rad/s
52 rad/s
81 rad/s
What is the Unit for Torque
m.N
N
W
J
A wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench?
7.5 m.N
1.5 m.N
750 m.N
150 m.N
A 800N man is playing on a seesaw with son who has a weight of 200N. If the child is sitting 3 meters away, how far will the man have to sit to balance the seesaw?
0.75m
3m
1.5m
1m
What is the net torque?
5 mN
10 mN
25 mN
50 mN
What is the net torque?
2 mN
5 mN
10 mN
25 mN
How do you get the maximum torque?
longer lever arm and less force at an acute angle
shorter lever arm and less force perpendicularly
shorter lever arm and more force perpendicularly
longer lever arm and more force perpendicularly
When a rigid object rotates about a fixed axis, what is true about all the points in the object?
They all have the same tangential acceleration.
They all have the same angular speed.
They all have the same tangential speed.
They all have the same radial acceleration.
The figure shows scale drawings of four objects, each of the same mass and uniform thickness, with the mass distributed uniformly. Which one has the greatest moment of inertia when rotated about an axis through point P?
A
B
C
D
A centrifuge rotor rotating at 9200rpm. The 9200rpm means
period
frequency
angular speed
angular acceleration
A rotating merry-go-round makes one complete revolution in 10s, so the period of the merry-go-round is
0.1s
0.5s
10s
20s
A 40-cm-diameter wheel accelerates uniformly about its center from 120rpm to 280rpm in 4s, determine its angular acceleration.
2.1rad/s2
25rad/s2
2.51rad/s2
4.2rad/s2
2 rad equals to
Calculate the rotational kinetic energy of a wheel with a rotational inertia of 10 kg ⋅m 2 and an angular velocity of 2 rad/s.
A disk and a ring have the same mass and radius, but the ring has all its mass at the rim. Which has a greater rotational inertia?
Cannot be determined without additional information
