The angular speed of a fly wheel making 120 revolutions/minute is.
The angular velocity of the second’s needle in watch is-
The average acceleration vector for a particle having a uniform circular motion in one revolution is
Angular velocity of minute hand of a clock is :
The second’s hand of a watch has length 6 cm. Speed of end point and magnitude of difference of velocities at two perpendicular positions will be :
In a uniform circular motion
Which of the following statements is false for a particle moving in a circle with a constant angular speed ?
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
A wheel is subjected to uniform angular acceleration about its axis. Initially its angular velocity is zero. In the first 2 sec, it rotates through an angle θ1. In the next 2 sec, it rotates through an additional angle θ2. The ratio of θ2/θ1 is
If the equation for the displacement of a particle moving on a circular path is given by (θ)=2t³+0.5 , where θ is in radians and t in seconds, then the angular velocity of the particle after 2 sec from its start is
For a particle in a non-uniform accelerated circular motion
Two particles P and Q are located at distances rP and rQ respectively from the axis of a rotating disc such that rP > rQ :
A stone tied to one end of string 80 cm long is whirled in a horizontal circle with a constant speed. If stone makes 14 revolutions in 25 sec, the magnitude of acceleration of stone is :
A body is moving in a circular path with acceleration a. If its velocity gets doubled, find the ratio of acceleration after and before the change:
A spaceman in training is rotated in a seat at the end of a horizontal arm of length 5m. If he can withstand acceleration upto 9 g then what is the maximum number of revolutions per second permissible ? (Take g = 10 m/s2)
A particle of mass m is moving in a uniform circular motion. The momentum of the particle is
If mass, speed & radius of rotation of a body moving on a circular path are increased by 50% then to keep the body moving in circular path increase in force required will be –
A motor cycle driver doubles its velocity when he is having a turn. The force exerted outwardly will be.
For a particle in circular motion the centripetal acceleration is
If the radii of circular paths of two particles of same masses are in the ratio of 1 : 2, then in order to have same centripetal force, their speeds should be in the ratio of :
