Mechanical Properties of Fluids — Physics STD 11 Science — Question

What is the effect on the value of potential energy if the height of the object is more or increases from earth's surface?

Tell the position of the center of mass of rectangular rod, disc and sphere etc.

The gravitational force between two spheres is x when the distance between their centers is y. What will be the new force if the separation is made 3y?

A needle floats in water, but sinks in soap solution. Why?

A retarding force is applied to stop a motor car. If the speed of the motor car is doubled, how much more distance will it cover before stopping under the same retarding force?

The kinetic energy of an object is 40 joules, if its mass is 5 kg then what will be the velocity of the object?

Is it possible for the value of friction coefficient to be greater than 1?

Determine the maximum acceleration of the train in which a box lying on its floor will remain stationary, given that the co-efficient of static friction between the box and the train’s floor is 0.15.

Water is flowing through a pipe of non- uniform area of cross-section. The velocity of water at point A is four time the velocity of water at another point B. What would be the diameter of the pipe at point A relative to point B?

Why is it difficult to walk on snow or sand?