Though the particle repeats its motion but not at a regular interval (Since the speed is continuously increasing), so (a) is not true. (b) and (c) are not true because the motion is not a to and fro motion. Since none of the (a), (b) and (c) is true hence (d) is true.
Law of conservation of momentum is applicable to isolated system (no external force is applied). In this case, the change in velocity is due to the gravitational force of earth.
(b) The magnitude of the frictional force on the car is greater than mv2/r
(c) The friction coefficient between the ground and the car is not less than α/g.
Explanation:
Since the circular...
(d) its velocity and acceleration both change.
Explanation:
Velocity and acceleration are both vectors and a vectors is fully defined with its magnitude and direction. Even when one entity changes, the vector...
(a) periodic
EXPLANATION:
Since a uniform circular motion repeats itself at a regular time interval.
(b) not true because it is not a to and fro motion. ...
(b) A body moving with a uniform angular velocity ω on a circular path of radius r has radial acceleration equal ω2r directed towards the centre of the path.
