Question

Example 13. A body of mass 4 kg initially at rest is subject
to a force 16 N. What is the kinetic energy acquired by the
body at the end of 10 s?
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Answer 1

Answer:

1jule of force to 1 meter so 16 jule is 16m

Answer 2

Answer:

Given= mass=4kg, f=16n,t=10s

f=ma

a=f/m=16/4=4m/s2

v=u+at=0+10*4=40m/s

K.E.=1/2mv²

=1/2*4*40*40

=2*1600

=3200Joules......