WorksheetsRotational Motion
Total questions: 14
Worksheet time: 20mins
Name
Class
Date
1.
2600 rev/min is equivalent to which of the following?
a)
2600 rad/s
b)
43.3 rad/s
c)
273 rad/s
d)
60 rad/s
2.
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?
a)
9.6 rad/s/s
b)
4.8 rad/s/s
c)
3.1 rad/s/s
d)
1.6 rad/s/s
3.
Which has greater linear speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?
a)
the inside horse
b)
the outside horse
c)
Neither
4.
When the clock reads 1:45 p.m., what is the rotational position of the minute hand in radians, as measured from a 12:00 reference line?
a)
π/4
b)
π/2
c)
π
d)
–π/4
5.
The easiest way to open a heavy door is by applying the force
a)
Near the hinges
b)
In the middle of the door
c)
At the edge of the door far from the hinges
d)
At the top of the door
6.
What is the Unit for Torque
a)
Nm
b)
N
c)
W
d)
J
7.
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?
a)
0.75m
b)
3m
c)
1.5m
d)
1m
8.
A state of equilibrium is also seen below. Each of the cars weighs the same 9800 N. Despite the fact that there is only one car on the left-hand side that is 9 m from the fulcrum, the torques balance because, the cars on the right-hand side, are ____meters from the fulcrum.
a)
4.5 m
b)
3 m
c)
1 m
d)
2 m
9.
What is the weight of the package?
a)
5 N
b)
10 N
c)
15 N
d)
20 N
10.
The moment of inertia:
a)
is synonymous with mass
b)
does not depend on where the mass is located
c)
resistance to a change in rotational inertia
d)
more resistance to change = less inertia
11.
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 perpendicular to the plane of the drawing at point P?
a)
A
b)
B
c)
C
d)
D
12.
why is the car on the left unstable?
a)
Its centre of mass is high
b)
it has a narrow base
c)
it has a high height
d)
all of the above
13.
this cupboard is filled with boxes. will it topple over ?
a)
it will
b)
it will not
c)
it will if the weight remains inside the base
14.
Signs are suspended from rods of equal length on the side of a building. For each case, the mass of the rod can be ignored. The mass of the sign is given in each figure. Which case has the greatest magnitude of the torque that the sign exerts about the point at which the rod is attached to the side of the building.
a)
b)
c)
d)
100 %
