Physics Test 16...

An object is moving through the liquid. The viscous damping force acting on it is proportional to the velocity.

Then dimensions of constant of proportionality are

A particle moves in a straight line with a constant acceleration.

It changes its velocity from  while passing through a distance 135 m in t second. The value of t is:

A stone tied to the end of a string of 1 m long is whirled in a horizontal circle with a constant speed. If the stone makes 22 revolutions in 44 seconds, what is the magnitude and direction of acceleration of the stone?

The upper half of an inclined plane with inclination f is perfectly smooth while the lower half is rough. A body starting from rest at the top will again come to rest at the bottom if the coefficient of friction for the lower half is given by

A body of mass 1 kg begins to move under the action of a time dependent force are unit vectors along x and y axis. What power will be developed by the force at the time t?

Find the value of k.

A body starts from rest from a point distance R₀ from the centre of the earth. The velocity acquired by the body when it reaches the surface of the earth will be (R represents radius of the earth).

The end of a uniform wire of length L and of weight W is attached rigidly to a point in the roof and a weight W1 is suspended from its lower end. If s is the area of cross-section of the wire, the stress in the wire at a height 3L/4 from its lower end is :

The relative velocity of two parallel layers of water is 8 cm/sec. If the perpendicular distance between the layers is 0.1 cm, then velocity gradient will be

When the temperature of a rod increases from t to t + t, its moment of inertia increases from I to If a be the coefficient of linear expansion of the rod, then the value of I/I is