In which of the following cases work is being done?

Pushing a box against a wall

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Standing still at one position

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Running in a straight line

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Sitting at one position

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Solution

The correct option is C Running in a straight line
Work is done when an object moves through some distance due to the force applied to it. From the above options, work is done only when someone is running in a straight line.

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In which of the following cases is work being done :

(a) A boy pushing a heavy rock

(b) A boy climbing up the stairs

(d) A girl moving on the road.

In which of the following cases will a small wooden box move the furthest?

Case 1: A bowling ball is thrown at the box

Case 2: A tennis ball is thrown at the box

Case 3: A ping-pong ball is thrown at the box

Case 4: A cricket ball is thrown at the box

S . H . M .

\frac{A}{2}

A =

S . H . M .

t = 0

S . H . M .

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