Question

b. The S.l. unit for retardation is -
(1)
(1) m/sec
(1) m/sec
C. The expression rate of change of Momentum' is used for --
(1) Acceleration (11) Mass
(1) Inertia
(iv) Nom af te soove
(iv) Force​

Answer 1

Explanation:

1. Retardation, actually, is acceleration that acts opposite to the direction of motion of an object. So, under retardation, an object accelerates away from its direction of motion, so it's velocity in that direction decreases. The SI unit of retardation, it being just an oppositely directed acceleration, is m/s^2.
2. Well, first of all, momentum is equal to product of mass and velocity of the object. Now, rate of change of momentum means change in momentum with respect to time is defined as force. ... F = d(mv)/dt = m*dv/dt = ma (I'm explaining this a later on.) Example: You are driving a car with varying speed.

Answer 2

hope the answer is correct.....