Physics Test 11...

The Dimension of σb⁴ (σ = Stefan's constant and b = Wein's Constant) are :

An athlete completes one round of a circular track of radius R in 40 seconds. The displacement at the end of 2 minutes 20 seconds is

A body slides down a smooth curved track which is one quadrant of a circle having radius 10 m. The speed of the body at the bottom of the track is:

A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest the force on the particle at time t is

An engine pumps up 100 kg of water through a height of 10m in 5 sec then if the efficiency of the engine os 60% then calculate the power of the engine where g = 10m/s

A block of mass 4 kg is placed on a rough horizontal plane. A time dependent force F = k t acts on the block, where k = 2 N/s² Force of friction between block and the plane at t = 2 sec (given coefficient of friction is 0.3)

A particle collides with another particle such that the second particle starts moving and the first particle stops just after the collision. Then which of the following conditions must always be valid? (m/M = ratio of masses)

A sphere has a perfectly elastic oblique collision with another identical sphere, which is initially at rest. The angle between their direction after the collision is

Two bodies having masses in the ratio of 3 : 1 possess the same kinetic energy. The ratio of their linear momentum is

The equation of a wave is given by y = Asin ω(x/v-K) Where Asin ω is angular velocity and v is linear velocity. The dimension of K is