What is the direction of ‘g’? Throw a stone vertically up. Measure

1.	What is the direction of ‘g’? Throw a stone vertically up. Measure the time required for it to come back to earth’s surface with stop clock.a) What happens to its speed when it moves up and down?b) What is the direction of acceleration?
Answer» a) When the stone moves up, its velocity decreases gradually and finally it becomes zero, because it is moving against the direction of gravitation. When its velocity becomes zero, it starts to fall down due to gravitational force of earth, and its velocity increases. b) While the stone is moving up, the direction of acceleration is in upward direction, which is against to the direction of gravitational force. While the stone is falling down, the direction of acceleration is in downward direction, which is in the direction of gravitational force.

What is the direction of ‘g’? Throw a stone vertically up. Measure the time required for it to come back to earth’s surface with stop clock.a) What happens to its speed when it moves up and down?b) What is the direction of acceleration?

Answer»

When the stone moves up, its velocity decreases gradually and finally it becomes zero, because it is moving against the direction of gravitation.
When its velocity becomes zero, it starts to fall down due to gravitational force of earth, and its velocity increases.

While the stone is moving up, the direction of acceleration is in upward direction, which is against to the direction of gravitational force.
While the stone is falling down, the direction of acceleration is in downward direction, which is in the direction of gravitational force.

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