10

You visited us 10 times! Enjoying our articles? Unlock Full Access!

Linear Momentum

If no externa...

Question

If no external force acts on a system

A

Velocity of centre of mass remains constant

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

Total kinetic energy of the system remains constant

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

Angular momentum of system may change

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

Total mechanical energy of the system remains constant

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A Velocity of centre of mass remains constant
No force means no acceleration implying constant velocity. Also as velocity is constant kinetic energy remains constant. The angular momentum may change due to the change in moment of inertia. Also the total mechanical energy may change due the change in potential energy.

Suggest Corrections

thumbs-up

0

Similar questions

Q. Assertion :When there is no external force on a system, its kinetic energy must remain constant Reason: When there is no external force on a system its linear momentum must remain constant.

Q. Assertion :No external force acts on a system of two spheres which undergo a perfectly elastic head-on collision. The minimum kinetic energy of this system is zero if the net momentum of the system is zero. Reason: If any two bodies undergo a perfectly elastic head-on collision, at the instant of maximum deformation, the complete kinetic energy of the system is converted to deformation potential energy of the system.

Q. Statement 1: If no external force acts on a system of particles, then the centre of mass will not move in any direction
Statement 2: If net external force is zero, then the linear momentum of the system remains constant.

Q. Assertion :If no external force acts on a system of particles, then the centre of mass will not move in any direction. Reason: If net external force is zero, then the linear momentum of the system changes.

Q. Can kinetic energy of a system be increased or decreased without applying any external force on the system? (Yes/No)

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

PHYSICS

Watch in App

explore_more_icon

Explore more

Linear Momentum

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon