Physics Test - ...

In S = a + bt + ct². S is measured in metres and t in seconds. The unit of c is

For a body falling freely under gravity from a height H, its Potential energy will be maximum at:

Consider a vehicle going on a horizontal road towards east. Neglect any force by the air. The frictional forces on the vehicle by the road

The time period of revolution of geostationary satellite with respect to earth is

A ball is projected upwards from the top of tower with a velocity 50 ms⁻¹ making angle 30^∘ with the horizontal. The height of the tower is 70 m. After how many seconds from the instant of throwing will the ball reach the ground.

A wagon weighing 1000 kg is moving with a velocity 50 km/h on smooth horizontal rails. A mass of 250 kg is dropped into it. The velocity with which it moves now is

The bob of a simple pendulum is imparted a velocity 5ms⁻¹ when it is at its mean position. To what maximum vertical height will it rise on reaching to its extreme position if 60% of its energy is lost in overcoming friction of air?

(Take g=10ms⁻²)

Two identical spherical masses are kept at some distance as shown. Potential energy when a mass m is taken from the surface of one sphere to the other

Two vectors of the same physical quantity are equal if

One end of a massless spring of constant 100 N/m and natural length 0.5 m is fixed and the other end is connected to a particle of mass 0.5 kg lying on a frictionless horizontal table. The spring remains horizontal. If the mass is made to rotate at angular velocity of 2 rad/s, then elongation of spring is