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Force and Laws of Motion
A stone of 1 kg is thrown with a velocity of 20 across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?
Because the stone comes into rest after travelling 50 m distance, therefore the final velocity of the stone will be zero.
To find: Force of friction (F) on the stone.
Using 3rd equation of motion
Now, for the force (F)
Therefore the force of friction between the stone and ice is -4 N.
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