Question

Q1 calculate total work done by the person weighing mass of 50 kg from one point to another wid the velocity of 5m/s in 2 min if the body covers a unit displacemnt.
Q2 calculate the work done by the person uses a power of 15 watt in 2 min.
Q3 calculate the total energy of the body of unit mass moving wid a speed of 5cm/sec upto displacemnt of 6cm.​

Answer 1

Answer:

1)

Given,

Mass m=50kg

Velocity=50cms

−1

1cm=0.01m

So, velocity=50×0.01ms

−1

v=0.5ms

−1

We know,

Kinetic energy =

2

1

mv

2

Substituting value of m and v in the equation:

Kinetic energy =

2

1

×50×0.5

2

=6.25J