An object of mass 5 kg is sliding on a smooth frictionless horizontal surface with a constant velocity of 10 m/s .The force required to keep thhe object moving with the same velocity is

Options

A. 250 N
B. 500 N
C. 0 N
D. 50 N

Answer

D

Explanation

Given that ,
m = 5 kgt , v = 10 m/s , t = 1 s
We know that , F = ma = `((mv)/t)`
= `(5xx10)/1 = 50 N ` .