Newton's Laws for System of Particles
Trending Questions
A block of mass moves with a uniform speed in a horizontal circular groove, with vertical sidewalls of a radius of . If the block takes to complete one round, the normal force by the sidewalls of the groove is:
Question 20
What is momentum? Write its SI unit. Interpret force in terms of momentum. Represent the following graphically
(a) momentum versus velocity when mass is fixed.
(b) momentum versus mass when velocity is constant
A stone of density 3000 kg/m3 is lying submerged in water of density 1000 kg/m3. If the mass of stone in air is 150 kg, calculate the force required to lift the stone. ( g=10 m/s2)
- 1000 N
- 600 N
- 500 N
- 750 N
- 50 N
- 45 N
- 40 N
- 55 N
A pulley fixed to the ceiling carried a thread with bodies of masses m1 and m2 attached to its ends. The masses of the pulley and the thread are negligible and friction is absent. Find the acceleration of the center of mass of this system.
A light and a heavy object have the same momentum. What is the ratio of their kinetic energy?
- Remains at rest
- moves with a velocity in the horizontal direction.
- Moves with a velocity v m/M
- moves with velocity vm/M cos in the horizontal direction
(A) Apply a large force on the ball
(B) Reduce the rate of change of momentum of the ball
(C) Keep the ball firmly in hand
Choose the correct statement(s).
- Only (B)
- Both (A) & (B)
- Only (A)
- Only (C)