PART - 1 CH - 3 Motion in a Plane — Physics STD 11 Science — Question

A copper cube of mass 200g slides down on a rough inclined plane of inclination 37° at a constant speed. Assume that any loss in mechanical energy goes into the copper block as thermal energy. Find the increase in the temperature of the block as it slides down through 60cm. Specific heat capacity of copper = 420Jkg^-1 K^-1.

A body of mass 2kg initially at rest moves under the action of an applied horizontal force of 7N on a table with coefficient of kinetic friction = 0.1. Compute the:
Work done by the net force on the body in 10s.

Crystalline solids are called true solids. Why?

What will be the effect on the angle of contact of a liquid if the temperature increases?

A man is standing on top of a building 100m high. He throws two balls vertically, one at t = 0 and other after a time interval (less than 2 seconds). The later ball is thrown at a velocity of half the first. The vertical gap between first and second ball is +15m at t = 2s. The gap is found to remain constant. Calculate the velocity with which the balls were thrown and the exact time interval between their throw.

What is the force equation of a SHM?

Explain why a violin note and sitar note may have the same frequency, yet we can distinguish between the two notes.

If the torricellian tube is tilted by 30° with the vertical how much length of mercury will stand at atmospheric pressure at sea-level?