Question

a stone is thrown vertically upwards from the surface of earth.what is the direction of velocity and acceleration of the stone.
1. on its way up
2. on its way down

Answer 1

1.
Direction of velocity is upwards as stone is thrown upwards.
Acceleration would be -9.8 as Earth is pulling stone downwards due to which speed of stone is decreasing.

2.
Direction of velocity is downwards as stone is moving downwards
Acceleration is 9.8 as speed is increasing due to earth gravitational force.

Answer 2

(a)on its upward motion

Answer:

Velocity is vertically upward and acceleration is vertically downward.

(b) on its downward motion?

Answer:

Both velocity and acceleration are vertically downward.