Question

a body of mass 6kg is acted upon by a force which causes displacement in it given as S=t^3/4 metres where t is time. the work done by the force in 2 seconds is:-
A)18J
B)9
C)27J
D)16J

Answer 1

Answer:

Acceleration produced in the body (a)=

dt

2

d

2

S

=

dt

2

d

2

(

4

t

2

)

=

2

1

m/s

2

So, Value of Force =ma=3N

So, work done =F.S=∫

0

2

(

4

3t

2

)dt=2J

Explanation:

answer is 9j