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Internal forces can change...

Internal forces can change

A

are always balanced

B

are never balanced

C

may or may not be balanced

D

None of these

Text Solution

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The correct Answer is:
A
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Choose the correct statement regarding a system of particles. Internal forces can change the kinetic energy of the system without changing system's momentum O Impulse can be defined as a very large force that acts for a very short time and causes finite change in momentum. Internal forces can change the potential energy of the system without changing system's momentum Internal forces can change the mechanical energy of the system without changing system's momentum.

If only an external force can change the momentum of the centre of mass of an object, how can be internal force of an engine accelerate a car?

If only an external force can change the state of motion of CM of a body then how does the internal force of the brakes bring bicycle to rest?

Explain with an example force can change the speed of an object. How does second law of newton supports it?

Internal forces acting in a system of particle can change

Internal forces acting in a system of particle can change

MCGROW HILL PUBLICATION-LAWS OF MOTION, FRICTION AND ARCHIMEDES' PRINCIPLE-HIGHER ORDER THINKING QUESTIONS
  1. Internal forces can change

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  2. A car travelling at a speed of 30 km/hour is brought to a halt in 8 m ...

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  3. A body of mass 1 kg moving on a horizontal surface with an initial vel...

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  4. The average force necessary to stop a hammer with 50 NS momentum in 0....

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  5. Two trains A and B are running in the same direction on the parallel r...

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  6. A body of mass 10 kg is acted upon by a net force F which varies with...

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  7. A machine gun has a mass 4 kg. It fires 50 gram bullets at the rate of...

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  8. A truck is loaded with 10^(3) kg of iron and another identical truck i...

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  9. A particle of mass M strikes a wall at an angle of incidence 60^(@) wi...

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  10. The ratio of SI to cgs units of force is

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  11. A metal ball and a rubber ball , both having the same mass , strike a ...

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  12. A man of weight mg is moving up in a rocket with acceleration 4 g . Th...

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  13. A thief stole a box full of valuable articles of weight W and while ca...

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  14. A bullet of mass m is fired at angle theta with the vertical. The bull...

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  15. A ballon has 2 g of air . A small hole is pierced into it . The air c...

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  16. A body of mass 2kg collides with a wall with speed 100 m/s and reboun...

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  17. In a rocket of mass 1000 kg fuel is consumed at a rate of 40 kg/s . Th...

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  18. Action and reaction

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  19. A body is in translatory equilibium if:

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  20. If the tension in the cable supporting an elevator is equal to the wei...

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  21. A scooter of mass 150 kg is moving with a uniform velocity of 108 km/h...

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