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Application of Second law of Motion

a retarding f...

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a retarding force F= -2v is acting on a body of mass 10 gram. Find out time taken for its velocity to reduce to 37% of its initial value if initial velocity is 1m/s

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Q. A force of 20 N acting on a body of mass 10 kg is found to double its velocity in 8 s. Find its initial velocity?

20 N

acting on a body of mass

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Q. A force F acts for 1 sec on a body of mass 1kg moving with initial velocity u in a direction perpendicular to its initial velocity

Q. A body of mass '

m

' is travelling with a velocity '

u

'. When a constant retarding force '

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s_{1}

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s_{2}

Q. If we throw a body vertically upwards with velocity of 4 m/s. Then at what height does its kinetic energy reduce to half of initial value?(Take g=10 m/s^-2)

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