Advertisements
Advertisements
प्रश्न
A body of mass 60 kg has the momentum 3000 kgm/s-1. Calculate: the speed of the body.
उत्तर
Mass of body = 60 kg
Momentum, p=3000 kgm/s
Momentum = mass x velocity
3000 = 60 x velocity
Velocity =50 m/s
APPEARS IN
संबंधित प्रश्न
Write the expression for work done by a force.
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B does the same in 15 s. Compare the Work done.
Define 1 joule of work.
A boy throws a rubber ball vertically upwards. What type of work, positive or negative, is done : by the force applied by the boy?
(a) by the force applied by the boy?
(b) by the gravitational force of earth?
Give one example each in which a force does (a) positive work (b) negative work, and (c) zero work.
A force of 50 N acts on a body and moves it a distance of 4 m on horizontal surface. Calculate the work done if the direction of force is at an angle of 60° to the horizontal surface.
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. If the value of g be 10 m/s2, the work done by the girl against the gravitational force will be :
Why is the work done on an object moving with uniform circular motion zero?
Name the force acting away from the centre of circular path.
What is the SI unit of work?
What is the work done when the object acted upon by a force remains at rest?
Write an expression for work done by a force depends?
Write an expression for the work done against gravity.
Complete the following sentences:
The SI unit of work is ....... and of power is .......
Can two agents, doing the same work, have different power?
In what way does an ‘Ideal machine’ differ from a ‘Practical machine’?
