30 practice sets · Page 2 of 2
A particle is performing a U.C.M. Which is the wrong statement regarding its motion?
The acceleration vector is tangential to the circle
The acceleration vector is directed towards the center of the circle
The velocity and acceleration vectors are perpendicular to each other
The velocity vector is tangential to the circle
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle? The motion takes place in a plane. It follows that
its acceleration is constant
its motion is linear
its motion is circular
its velocity is constant
A ladybug rests on the bottom of a tin can that is being whirled horizontally on the end of a string. Since the ladybug, like the can, moves in a circle, there must be a force on it. What exerts this force?
The string
There is no force acting on it.
The can
Gravity
A communication satellite is in a circular orbit around Earth. If the speed of the satellite is constant, the force acting on the satellite
is decreasing.
points toward the center of the Earth at all times.
points in the direction that the satellite is moving.
is zero.
A car travels in a circle with constant speed. The net force on the car
is directed forward, in the direction of travel.
is directed toward the center of the curve.
none of the above
is zero because the car is not accelerating.
A car sometimes overturns while taking a turn. When it overturns, it is
The outer wheel which leaves the ground first
both the wheel leave the ground simultaneously
Either inner wheel or the outer wheel leaves the ground
The inner wheel which leaves the ground first
A car is making a turn at speed v. The radius of the turn is r and the centripetal force on the car is F. If the car rounds the same curve at speed 2v, the required centripetal force is
F
2F
4F
1/2 F
A body of mass m moves in a horizontal circle of radius r at constant speed v for one complete revolution. Which of the following statements is incorrect?
The work done by the centripetal force is 2 pi m v2.
The change in linear momentum of the body is zero.
The total energy of the body is constant.
The angular velocity of body is directed perpendicular to the plane of circular motion.
A body is traveling in a circle at a constant speed. It
has no acceleration
has an inward acceleration
has an outward radial acceleration
has a constant velocity
A body is moving along a circular path with variable speed, it has
A tangential acceleration
Zero acceleration
Both radical and tangential acceleration
A radical acceleration
