Advertisements
Advertisements
प्रश्न
Explain why it is possible for a small animal to fall from a considerable height without any injury being caused when it reaches the ground.
Advertisements
उत्तर
Small animals have low mass and hence their momentum is small. So, when they fall from a considerable height, their momentum is not large enough to cause considerable damage to their bodies. However, falling from too great a height will definitely kill them.
APPEARS IN
संबंधित प्रश्न
From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 m s−1. Calculate the initial recoil velocity of the rifle.
Two objects, each of mass 1.5 kg are moving in the same straight line but in opposite directions. The velocity of each object is 2.5 m s−1 before the collision during which they stick together. What will be the velocity of the combined object after collision?
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.)
What is the SI unit of momentum ?
What is the total momentum of the bullet and the gun before firing ?
Calculate the momentum of a toy car of mass 200 g moving with a speed of 5 m/s.
A man throws a ball weighing 500 g vertically upwards with a speed of 10 m/s.
- What will be its initial momentum ?
- What would be its momentum at the highest point of its flight ?
Which physical quantity corresponds to the rate of change of momentum ?
Explain why, a cricket player moves his hands backwards while catching a fast cricket ball.
State the law of conservation of momentum.
