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

Acceleration due to gravity decreases more rapidly _________ earth surface.

If tension of a wire is increased to four times, how is the wave speed changed?

A hollow sphere, a solid sphere, a disc and a ring all having same mass and radius are rolled down on an inclined plane. If no slipping takes place, which one will take the smallest time to cover a given length?

Read each statement below carefully and state, with reasons and examples, if it is true or false:A scalar quantity is one that
Does not vary from one point to another in space.

In changing the state of a system from A to B does the change in its internal energy depend on the path or not?

The glass and copper pieces are heated to the same temperature. Why does a piece of copper feel hotter when touched?

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.

A hollow sphere, a solid sphere, a disc and a ring all having same mass and radius are rolled down on an inclined plane. If no slipping takes place, which one will take the smallest time to cover a given length?

Two particles A and B start from rest and move for equal time on a straight line. The particle A has an acceleration a for the first half of the total time and 2a for the second half. The particle B has an acceleration 2a for the first half and a for the second half. Which particle has covered larger distance?

What is the condition for the difference between the length of a certain brass rod and that of a steel rod to be constant at all temperature?