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Standard IX

Physics

Motion under Gravity

A block of ma...

Question

A block of mass $5 kg$ is dropped from top of a building. Then, the magnitude of force applied by the block on the earth while falling is (where g is acceleration due to gravity) :

5 g N

upwards

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5 g N

downwards

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10 g N

upwards

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None of these

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Solution

The correct option is A $5 g N$ upwards
Earth is applying a force of magnitude $5 g N$ downwards while the block is falling.

Therefore,
From Newton's ${III}^{r d}$ law of motion block will apply a force of $5 g N$ upwards.

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A block of mass 5 kg is dropped from top of a building. Then, the magnitude of force applied by the block on the earth while falling is (where g is acceleration due to gravity) :

The correct option is A 5g N upwards Earth is applying a force of magnitude 5g N downwards while the block is falling. Therefore, From Newton's IIIrd law of motion block will apply a force of 5g N upwards.

A block of mass $5 kg$ is dropped from top of a building. Then, the magnitude of force applied by the block on the earth while falling is (where g is acceleration due to gravity) :

The correct option is A $5 g N$ upwards
Earth is applying a force of magnitude $5 g N$ downwards while the block is falling.

Therefore,
From Newton's ${III}^{r d}$ law of motion block will apply a force of $5 g N$ upwards.