Question

A body is moving with speed 20 m/s comes to rest after travelling 400 m distance then the retarding of acting on body if its mass is 4 kg

Answer 1

Answer:

PLS MARK AS BRAINLIEST !!!

RETARDATION = 1/2 m/s sq.

Explanation:

v = final velocity

u = initial velocity

S = distance travelled

a = acceleration

r = retardation

r = (-a)

By law ,

S = (v^2 - u^2)/2a

S = (0 - 400)/2a

400 = (-400)/2a

r = 400/(400*2)

r = 1/2 m/s^2

Hence , retardation is half metre per second sq.

Answer 2

Answer:

Retarding force= -2N

Explanation:

In the image....

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