Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A scale is adjusted to zero . Particles fall from a height h = 250 m before colliding with the balance pan of the scale . The collisions are elastic . If each particle has a mass of m = 100 mg and collisions occur at the rate n = 1000 particles per second , what is the scale reading in kg ?

A scale is adjusted to zero . Particles fall from a height h = 250 m before colliding with the balance pan of the scale . The collisions are elastic . If each particle has a mass of m = 100 mg and collisions occur at the rate n = 1000 particles per second , what is the scale reading in kg ?

a man of mass 'm' is standing on the car A railroad flatcar of mass M can roll without friction along a straight horizontal track. Initially which is at rest. What is the velocity of the car if man runs to the left so that his speed relative to the car is vrel.