- how much force is required to keep a body moving with a constant speed on a frictionless surface?
- give an example in which momentum changes even through the speed and mass remain the same?
- if the mass of a body and the force acting on it are both doubled what happens to the acceleration?
- is any force required to keep a body moving in a circular path?
1-No forces are required to keep a body moving with a constant speed on a frictional surface.
2-Momentum=Mass x Velocity
If mass and velocity of a body are constant then it's momentum will also remain same.
3-We know that,
Force (F)=Mass( m) x Acceleration (a)
Or a=F/m
If m'=2m and F'=2F
Then a'=2F/2m=F/m=a
Acceleration will remain same.
4-Yes,The centripetal force is required to keep a body moving in a circular path.