Question

4. A constant retarding force of 20 N acts on a body of mass 5 kg moving with a speed of
10 m/s. How long does the body take to stop?
( )​

Answer 1

Answer:

It takes 6s for body to stop. since it is retardation then acceleration become negative. therefore a= -2.5 m/s^2

Explanation:

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Answer 2

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ANSWER

F=m×a

 50=20×a

 a=2.5ms−2

deacceleration  is 2.5ms−2

0=15−2.5t

0=15−2.5t

t=2.515

t=6s