Advertisements
Advertisements
प्रश्न
Calculate the momentum of a toy car of mass 200 g moving with a speed of 5 m/s.
Advertisements
उत्तर
We know that:
Momentum = mass × velocity
= m × v
Here, mass, m = 200 g
or m = 0.2 kg
And, velocity, v = 5 m/s
Putting these values in the above formula, we get:
Momentum = 0.2 × 5 kg.m/s = 1 kg.m/s.
APPEARS IN
संबंधित प्रश्न
A nucleus is at rest in the laboratory frame of reference. Show that if it disintegrates into two smaller nuclei the products must move in opposite directions.
Figure shows a man standing stationary with respect to a horizontal conveyor belt that is accelerating with 1 m s–2. What is the net force on the man? If the coefficient of static friction between the man’s shoes and the belt is 0.2, up to what acceleration of the belt can the man continue to be stationary relative to the belt? (Mass of the man = 65 kg.)

Explain the meaning of the following equation : .
p = m x v
where symbols have their usual meanings.
What is the momentum in kg.m/s of a 10 kg car travelling at (a) 5 m/s (b) 20 cm/s, and (c) 36 km/h ?
Calculate the change in momentum of a body weighing 5 kg when its velocity decreases from 20 m/s to 0.20 m/s.
State the relation between the momentum of a body and the force acting on it.
A 10 g bullet travelling at 200 m/s strikes and remains embedded in a 2 kg target which is originally at rest but free to move. At what speed does the target move off ?
Why are car seat-belts designed to stretch some what in a collision ?
A truck of mass 500 kg moving at 4 m/s collides with another truck of mass 1500 kg moving in the same direction at 2 m/s. What is their common velocity just after the collision if they move off together ?
A girl riding a bicycle along a straight road with a speed of 5 ms–1 throws a stone of mass 0.5 kg which has a speed of 15 ms–1 with respect to the ground along her direction of motion. The mass of the girl and bicycle is 50 kg. Does the speed of the bicycle change after the stone is thrown? What is the change in speed, if so?
