The group velocity of matter waves associated with a moving particle is:

If lift is going up with acceleration, the apparent weight of a body is -

Which graph represents uniform motion?

A body is projected upwards with an initial velocity u . At the highest point, what is its acceleration?  

When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance?

The refractive index of glass is 1.5. What is the speed of light in glass?

(Speed of light in vacuum is 3.0 ×10⁸ m s^-1)

A train runs along an unbanked circular track of radius of 10 m at speed of 36 km/h. The mass of the train is 1⁶ kg.

The order of wavelengths for ordinary light is:

If a force of 20 N is applied to push a 4 kg object, what is the acceleration produced?  

Total mechanical energy =