A body of mass $1 k g$ is thrown vertically upwards up with an intial speed of $5 m s^{- 1}$ . What is the magnitude and direction of force due to gravity acting on the body when is at its highest point

9.8 N

and downward

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9.8 N

and upward

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4.9 N

and downward

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4.9 N

and upward

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Solution

The correct option is A $9.8 N$ and downward
When the body is at the highest point of its motion its velocity is zero but it is acted upon by the acceleration due to gravity (while it is at rest for a moment at the highest point).
Magnitude of the force on the body at the highest point is given as,
Force, $F = m g = 1 \times 9.8 = 9.8 N$
And, the force due to gravity acts on the body in the downward direction.

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A body of mass 1kg is thrown vertically upwards up with an intial speed of 5ms−1. What is the magnitude and direction of force due to gravity acting on the body when is at its highest point

A body of mass $1 k g$ is thrown vertically upwards up with an intial speed of $5 m s^{- 1}$ . What is the magnitude and direction of force due to gravity acting on the body when is at its highest point