Verified answer

Answer:

A force is applied on a body of mass 20 kg moving with a velocity of 40 M s-1 in 2 sec . Calculate the work done by the body .

Force =m

t

(v−u)

=m⋅a

Displacement =

2a

(v

2

−u

2

)

Word done (W) = Force × Displacement

=m⋅a⋅

2a

(v

2

−u

2

)

W =

2

1

m(v

2

−u

2

)

W =

2

1

×20×(2500−1600)

=

2

1

×20×900

=9000J

Therefore, the work done to attain the final velocity is 9000J

Explanation:

It is a four-sided quadrilateral whose area formula is expressed as, product of its base and height, i.e., A = base × height square units.