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Q5.2 A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble,
(c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45° with the horizontal direction? Ignore air resistance.
Answers (1)
At the highest point velocity becomes zero for a moment. At this point also, the net force acting is the gravitational force which acts in the downward direction.
Gravitational force:-
or
When a pebble is thrown at 450 with the horizontal direction then also net force will be the same gravitational force.
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