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

Is energy produced when a transformer steps up the voltage?

What does the slope of stress versus strain graph indicate?

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.

Standing in the sun is more pleasant on a cold winter day than standing in shade. Is the temperature of air in the sun considerably higher than that of the air in shade?

On what factors does the thrust on a rocket depend?

What will be the ratio of the velocity of efflux from two holes made with a separation (H - 2h) in a container holding liquid of height 'H' and one hole at a depth ‘h' from its bottom? Give reason.

Is it possible that even after heating a body, its temperature does not increase? Does this go against the first law of thermodynamics?

Fill in the blanks using the word (s) from the list appended with statement:
For solids with elastic modulus of rigidity, the shearing force is proportional to . . . while for fluids it is proportional to . . . (shear strain/ rate of shear strain).