A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 ms^(-1) . How long does the body take to stop?

A constant retarding force of 50 N is applied to a body of mass 20 kg

1.	A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 ms^(-1) . How long does the body take to stop?
Answer» 0.75 s 1.33 s 6 s 35s Solution :Acceleration `a = (-F)/(m) = (-50)/(20) = - 2.5 ms^(-2)` ` u= 15 ms^(-1), V= 0 , t = ? ` ` t =(15)/(2.5) = 6s`