Question

A constant force acting on a body of mass 5 kg changes its speed from 2 ms1 to 4 ms1 in 20 s, without changing its direction of motion. the magnitude of the force is

Answer 1

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Answer 2

m=5kg

speed(v)= 2-4

= -2

t=20s

v=u+at

-2= 0+a(t)

-2= a(20)

a= -2/20

a= -1/10

F=ma

=5(-1/10)

= -1/2

=0.5

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