Systems of Particles and Rotational Motion — Physics STD 11 Science — Question

Two satellites of equal masses, which can be considered as particles, are orbiting the earth at different heights. Will their moments of inertia be same or different?

If the n forces are acting on an object can be expressed sequentially by the sides of n sided polygon, then the object will be.............

If a string of a rotating stone breaks, in which direction will the stone move?

At Deoprayag (Garhwal, UP) river Alaknanda mixes with the river Bhagirathi and becomes river Ganga. Suppose Alaknanda has a width of 12m, Bhagirathi has a width of 8m and Ganga has a width of 16m. Assume that the depth of water is same in the three rivers. Let the average speed of water in Alaknanda be 20km/h and in Bhagirathi be 16km/h. Find the average speed of water in the river Ganga.

What happens to coefficient of friction, when weight of body is doubled?

The length covered by a body is found to be directly proportional to the square of time. What is the nature of acceleration?

In summer, when the valve of a bicycle tube is removed, the escaping air appears cold. Why?

When a pendulum clock is taken to a mountain, it becomes slow. But a wrist watch controlled by a spring remains unaffected. Explain.