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A 4 kg cart...

Question

A $4 k g$ cart starts moving up an incline of $45^{o}$ with a speed of $8 m / s$ and comes to rest after moving up $2 m$ along the incline. Find the total work done by all forces on the cart.

A

8 J

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B

0 J

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C

40 \sqrt{2} J

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D

40 \sqrt{3} J

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Solution

The correct option is B $0 J$
Cart is moving with constant speed hence net force on the cart is zero.

So, net work done on by all forces will cancel out each other

Hence, net work done on cart is zero.

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