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

A sphere rolls on a horizontal surface. If there any point of the sphere which has a vertical velocity?

How much is the Modulus of Rigidity of a fully rigid body?

It is a common observation that rain clouds can be at about a kilometre altitude above the ground.
Rate of change of momentum is force. Estimate how much force such a drop would exert on you.

From where does a satellite revolving around a planet get the required centripetal force?

Find the dimensional formulae of (i) Kinetic energy and (ii) Pressure.

What will the effect on time period if a hollow sphere of the same size is used instead of a solid iron sphere in a simple pendulum.

How many amu make 1kg?

Every action has a............but opposite in direction. equal in magnitude

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.

State, for each of the following physical quantities, if it is a scalar or a vector : volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity.