Physics
A force to be expressed correctly requires :
- only the magnitude
- only the direction
- both the magnitude and direction
- none of the above.
Related Questions
A body falls downwards because of :
- electrical force
- gravitational force
- mechanical force
- magnetic force.
A force does not change :
- mass
- length
- shape
- state of motion
Friction :
- promotes motion
- opposes motion
- acts in the direction of motion
- is always a nuisance.
Friction is reduced by :
- making the surfaces wet
- making the surfaces dry
- making the surfaces rough
- sprinkling sand on the surface.