Page 3 - HA

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3. A car of mass 1000 kg travelling at 32 ms dashes into the rear of a truck of mass 8000 kg
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moving in the same direction with a velocity of 4 ms . After the collision, the car bounces with a
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velocity of 8 ms . What is the velocity of truck after the impact?(HOTS)
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4. A neutron having amass 1.67× 10 kg and moving at 10 ms collides with a deuteron at rest
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and sticks to it. If the mass of deuteron is 3.34 × 10 kg, find the speed of the combination?(AVG)
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5. A hunter has a machine gun that can fire 50 g bullets with a velocity of 150 ms A 60 kg tiger
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springs at him with a velocity of 10 ms . How many bullets must the hunter fire into the tiger in
order to stop him in track? (HOTS)
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6. A 30 g bullet leaves a rifle with a velocity of 300 ms and the rifle recoils with a velocity of 0.60
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ms . Find the mass of the rifle.
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7. A man weighing 60 kg runs along the rails with a velocity of 18 kmh and jumps into a car of
mass 1 quintal standing on the rails. Calculate the velocity with which the car will start travelling
along the rails. (AVG)
8. A boy of mass 50 kg running 5 m/s jumps on to a 20 kg trolley travelling in the same direction at
1.5 m/s. find their common velocity (BOARD)