A particle is acted upon by a force of constant magnitude.

When the forces acting on an object are balanced, the object is either at rest or moving with uniform velocity.

The gravitational force is responsible for providing the necessary centripetal force

(d) the information is insufficient to decide the relation of xA with xB. Explanation: Magnitude of displacement depends up on initial velocity, time Duration and acceleration. In this case only time is known while magnitude of initial velocity and acceleration...

(b) There are other forces on the particle.  (d) The resultant of the other forces varies in magnitude as well as in direction. Explanation:  Above situation is possible when resultant of external forces...

(c) its kinetic energy is constant (d) it moves in a circular path. Explanation:  Since the force is always perpendicular to the velocity, it means there is no displacement in the direction of...

Initial angular velocity = 20 rad/s Therefore α = 2 rad/s2  t1 = ω/α 1 = 20/2 = 10 sec Therefore 10 sec it will come to rest. Since the same torque continues to act...

(b) gradually decrease

(c) its kinetic energy is constant (d) it moves in a circular path. Explanation:  Since the force is always perpendicular to the velocity, it means there is no displacement in the direction of...

 Resultant force = 10N at an angle of tan-1(3/4) = 37° with the directionof 8N force. Acceleration = 2ms-1 in the same direction as the resultant force

 a = - 20ms-2  0 ≤ t ≤ 30s  t = - 5s:  x = ut = -10 × 5 = - 50m  t = 25s :  x = ut + (½) at2 = (10 × 25...