NEET Physics: Questions 945 - 948 of 2099
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Question number: 945
Question number: 946
A rifle man, who together with his rifle has a mass of 100 kg, stands on a smooth surface fires 10 shots horizontally. Each bullet has a mass 10 gm and a muzzle velocity of 600 m/s. What velocity does rifle man acquire at the end of 10 shots.
Question number: 947
A ball moving with a speed of 9 m/s strikes with an identical stationary ball such that after the collision the direction of each ball makes an angle of 30° with the original line of motion. Find the speeds of the two balls after the collision. Is the kinetic energy conserved in this collision process?
6 √3 m/s, yes
6 √3 m/s, no
3 √3 m/s, no
Question number: 948
Block A is moving on horizontal surface towards right under the action of force F. All surfaces are smooth. At the instant shown the force exerted by block A on block B is equal to net force on block B.
From Newton’s third law of motion, the force exerted by block A on B is equal in magnitude to force exerted by block B on A.
|a.||Both Ꭺ and Ꭱ are false|
|b.||Ꭺ is true but Ꭱ is false|
|c.||Ꭺ is false but Ꭱ is true|
|d.||Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ|