# PHYSICS : REVISION TEST ON TOPICS OF CLASS XI ---VI

A ring of mass 10 kg and diameter 0.4 m is made to turn 2100 rev/min about its axis. The ring will then have an angular momentum of
44 kgm2/s2
88 kgm2/s2
132 kgm2/s2
176 kgm2/s2
A ring (mass 0.3 kg and radius 0.1 m) and a solid cylinder (mass 0.4 kg and radius 0.1 m) are given the same kinetic energy and released simultaneously on a flat horizontal surface such that they begin to roll towards a wall which is at the same distance from the ring and cylinder. If the rolling friction is negligible, then :
cylinder will reach the wall first
ring will reach the wall first
both will reach the wall at the same time
date is insufficient to make any prediction
A particle covers equal distances around a circular path in equal intervals of time. Which of the following parameters connected with the motion of particle remains constant with time?
displacement
speed
velocity
acceleration
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that the particle has
motion in a circular path
constant velocity
constant acceleration
constant kinetic energy
A particle is moving along a circular path with uniform speed. The force acting on the particle is
zero
constant is magnitude only
continuously varying in magnitude and direction
constant both in magnitude and direction
For a particle moving in a circular orbit of radius 0.4 m, the angular velocity and angular acceleration at a particular instant are 2rad/s and 5rad/s2. The particle then has a total linear acceleration of
1.9 m/s2
2.69 m/s2
3.8 m/s2
7.24 m/s2
An aircraft executes a horizontal loop of radius 1 km with a steady speed of 900 km/hr. In terms of acceleration due to gravity (g = 10 m/s2), the centripetal acceleration of aircraft would be
3.12 g
6.25 g
12.5 g
18.75 g
Starting from rest, a particle travels on a circular path and the distance covered is prescribed by the relation s = kt2; where k is constant and t is the time. The particle then has a tangential acceleration of
k/2
k
2k
4k
A stone tied to the end of a string 1000 cm ling is whirled in a horizontal circle with a constant speed. If the stone makes 15 revolutions in 30 seconds, the acceleration of the stone is closest to
315 cm/s2
630 cm/s2
985 cm/s2
3950 cm/s2
A person standing on a uniformly rotating turn table has his arms held close to his chest. If he outstretches his arms
the moment of inertia will decrease
the angular momentum will increase
the speed of rotation will decrease
the angular velocity will remain constant
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TOPIC: CIRCULAR MOTION

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Kajal Sengupta
Physics 9th to 12 th grade,CIE, Edexcel, AP, IB , CBSE, ICSE 87 Members Recommend
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