Question

24. A body of mass 5 kg moving on a horizontal surface with a velocity of 10 ms
comes to rest in 2s. The force required to make this body move with a velocity of
10 ms-l on the same surface is
1) Zero
2) 10 N
3) 25 N
4) 50 N
25. A machine gun fires a bullet of mass 40 g with a velocity 1200 ms-l. The man
holding it, can exert a maximum force of 144N on the gun. How many bullets
can he fire per second at the most ?
1) One
2) Four 3) Two
4) Three
26. Gravel is dropped on a conveyor belt at the rate of 2 kg/s. The extra force
required to keep the belt moving at 3ms-lis
1) 1 N
2) 3 N
3) 4 N
4) 6 N
27. A hammer of mass 1 kg strikes on the head of a nail with a velocity of 2 ms. It
drives the nail 0.01 m into a wooden block. Find the force applied by the
hammer and the time of impact.
1) 200 N; 10-2 sec.
2) 100 N; 10- sec.
3) 30
0-2 ser
4) 400 N. 10-3​

Answer 1

Answer:

the answer of 24 question is is option II, the answer of 25 question is is option first, the answer of 26 question is option second, the answer of 27 question is is option third