Question

Constant force acting on an object of mass 2kg increases its velocity from 5m/s to 15m/s. find the work

done by the force.​

Answer 1

Answer:

we know that

v=u+at

15=6+a(2)

a=4.5m/s2

s=ut+0.5at2=6(2)+0.5(4.5)(4)=21m

W=mas=2(4.5)(21)=189J

Answer 2

Answer:

we know that

v=u+at

15=6+a(2)

a=4.5m/s2

s=ut+0.5at2=6(2)+0.5(4.5)(4)=21m

W=mas=2(4.5)(21)=189J