Which two forces act directly on objects that are unable to be viewed by the unaided eye?
Gravity is a pair of forces of attraction between every
two objects. Period !
It doesn't matter whether they're moving together, moving apart,
moving gracefully in synchrony, or at rest. The gravitational forces
of attraction between them are always there.
The frequency of the applied voltage is constant
27) Velocity and time
28) it indicates increasing velocity
29) It is moving in constant velocity which means no acceleration.