Question

3
.
In which of the following cases forces may not be required to keep the
a) particle going in a circle
b) particle going along a straight line
c) momentum of the particle constant
d) acceleration of the particle constant
​

Answer 1

Answer:

i think b is tje ans.....

Answer 2

Answer:

option c

Explanation:

Given that, momentum is constant

that means

p=m.v is constant

v is also constant

a=dv/dt

as v is constant,

a will be zero that means the force is zero

as we know that f=ma

So,when momentum is constant the force is not required .