Choose the correct statements from the following: |
|
a) |
The general form of Newton’s second law of motion is |
b) |
A bond can have energy and get no momentum |
c) |
A body having momentum must necessarily have kinetic energy |
d) |
The relative velocity of two bodies in a head-on elastic collision remains unchanged in magnitude and direction |
Choose the correct statements from the following: |
|
a) |
The general form of Newton’s second law of motion is |
b) |
A bond can have energy and get no momentum |
c) |
A body having momentum must necessarily have kinetic energy |
d) |
The relative velocity of two bodies in a head-on elastic collision remains unchanged in magnitude and direction |
(b,c)
The general form of Newton’s second law is
The form is valid only if
, i.e., mass does not change with time. Hence, option (a) is incorrect.
Option (b) is correct because a body at rest may have potential energy yet no momentum. Option (c) is also correct. A body has momentum if it has mass and velocity and a body having mass and velocity must have kinetic energy. Option (d) is incorrect because the relative velocity remains unchanged in magnitude and gets reversed in direction
Hence, the correct options are (b) and (c)