Question

Velocity-time graph of a particle moving in a straight line is shown in figure. Mass of the particle is 2 kg. Power delivered by all the forces acting on the particle at 1=5 sec is v (m/s) 5 t = 10 t (sec) 5 Zero​

Answer 1

Answer:

Correct option is B)

Acceleration of the particle = a =

Δt

Δv

=

2

−20

=−10m/s

2

Distance travelled by particle before coming to rest=Area of the triangle=

2

1

×2×20m=20m

Thus the work done by forces=Fs=mas

=2×−10×20J=−400J

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