Important formulas in the chapter force and laws of motion.
Explain what is momentum?
If no external forces acts on a system of particles then the momentum of the system remains conserved.
Define Momentum. Write its SI unit.
How much momentum will a dumbbell of mass transfer to the floor if it falls from a height of ? Take its downward acceleration to be .
Is momentum a scalar or vector?
A particle of mass m is projected with a velocity v making an angle 45 degree with the horizontal. The magnitude of the angular momentum of the projectile about the pointof projection when the particle is at its max height h.
A balloon is at a height of 81m and is ascending upwards with a velocity of 12 m/s. A body of 2kg weight is dropped from it. If g=10ms−2 the body will reach the surface of the earth in how much time?
A cricket ball is dropped from a height of 20 m. Calculate the speed of the Ball when it hits the ground and calculate the time it takes to fall through this height. (g=10ms−2)
Lugage placed on the roof of a car or bus is tied with rope.Give reason.
If two bodies of different masses have the same K.E. then the relation between momentum and mass will be: