Physics Test - ...

A motor car moving with a uniform speed of 20 ms⁻¹ comes to rest on the application of brakes after travelling a distance of 10 m. Its acceleration is  

Using the expression 2dsinθ=λ, one calculates the values of d by measuring the corresponding angles θ in the range θ to 90^o. The wavelength λ is exactly known and the error in θ is constant for all values of θ. As θ increases from 0^o,

The magnitude of the resultant of two equal vectors is equal to the magnitude of either vector. What is the angle between the two vectors?

A rod of mass \(M,\) hinged at \(O\) is kept in equilibrium with a spring of stiffness \(k\) as shown. The

potential energy stored in the spring is:

A motorcycle is going on an overbridge of radius R . The driver maintains a constant speed. As the motorcycle is ascending on the overbridge, the normal force on it

A 10 kg mass is resting on a horizontal surface and horizontal force of 80 N is applied. If μ=0.2, the ratio of acceleration without friction and with friction is (g=10ms⁻²)

Modulus of elasticity for a perfectly elastic body is

A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is about

A body of mass 10 kg is slipping on a rough horizontal plane and moves with a deceleration of 4.0 m/s². What is the magnitude of frictional force?

A ball moving with a speed of 2.2 m/sec strikes an identical stationary ball. After collision the first ball moves at 1.1 m/sec at 60⁰ with the original line of motion. The magnitude and direction of the ball after collision is