WorksheetsRotational motion
Total questions: 10
Worksheet time: 5mins
Centre of mass of a body
lies always along the edge
lies always inside the body
lies always outside the body
may lie within or outside the body
The velocity of centre of mass of the system remains constant, if the total external force acting on the system is
minimum
maximum
unity
zero
A child is standing on one end of a long trolley moving with a speed v on a smooth horizontal floor. If the child starts running towards the other end with a speed u, the centre of mass of the system will move with a speed
zero
u + v
v - u
v
A couple produces
purely translational motion
purely rotational motion
Both translational and rotational motion
no motion
Moment of couple is called
Angular momentum
force
torque
impulse
Analogue of mass in rotational motion is
moment of inertia
radius of gyration
torque
angular momentum
Moment of inertia of a body depends on
mass of the body
axis of rotation of the body
shape and size of the body
all of these
A flywheel rotating at 420 rpm slows down at a constant rate of 2 rad/s. The time required to stop the flywheel is
22 s
11 s
44 s
12 s
A person is standing on a rotating table with metal sphere in his hands. If he withdraws his hands to the chest, then the effect on his angular velocity will be
increases
decreases
remain same
first increases then decreases
When a torque acting upon a system is zero. Which of the following will be constant?
Force
Linear impulse
Linear momentum
Angular momentum
