1.What is the momentum of a man of mass 75 kg when he walks with a velocity of 2m/s?
2. A man pushes a box of mass 50 kg with a force of 80 N. what will be the acceleration of the box?
What would be the acceleration if the force were doubled?
3. A motorcycle is moving with a velocity of 90km/hr and takes 5 sec to stop after brakes are applied.
Calculate the force exerted by the brakes on the motorcycle if its mass alongwith the rider is 200kg.
4. State Newton’s second law of motion.
5. Derive F= m*a from Newtons second law of motion
6. A truck of starts from rest and rolls down a hill with a constant acceleration. It travels a distance of
400m in 20 sec. Find the force acting on it if its mass is 7 metric tonnes ( Hint 1 metric tonne =
1000Kg)
7. A stone is thrown with a velocity of 20 m/s across the frozensurface of a lake and comes to rest
after travelling a distance of 50m. What is the force of friction between the stone and the ice?
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