Question

The velocity of a particle of mass 1 kg is given by
v=10√ x. The work-done by the force acting on the
particle during its motion from x = 4 to x = 9 m is
(1) 250 J
(2) 300 J
(3) 450J
(4) 500 j​

Answer 1

Answer:

Explanation:

work done = force * displacement =  integration f.dx

force =dv/dx=5/x^1/2

f.dx = integeration 5/x^1/2 dx = 10 x^1/2( apply limit 4 to 9)

you get the answer

which is 10 joule

Answer 2

Answer:

500j ' x is equal to 4 &9 they square root is 2&3 it multipled 10