PART - 1 CH - 4 Laws of Motion — Physics STD 11 Science — Question

State the condition for translational equilibrium of a body.

What will happen to the potential energy if a wire is:

1. Compressed,
2. Stretched?

Doubling the pressure at constant temperature for a gas but the molecular weight, what will be the effect on velocity?

Draw a diagram to show all the forces acting on a tanga-horse earth system and mark the action- reaction pairs in them.

Two particles A and B are moving along the same straight line. Bis ahead of A. Velocities remaining unchanged, what would be effect on the magnitude of relative velocity if A ahead of B?

Explain why Atmospheric pressure at a height of about 6km decreases to nearly half of its value at the sea level, though the height of the atmosphere is more than 100km.

Why is it cooler at the top of mountains?

The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative: Work done by friction on a body sliding down an inclined plane.

The gravitational force between a hollow spherical shell (of radius R and uniform density) and a point mass is F. Show the nature of F vs r graph where r is the distance of the point from the centre of the hollow spherical shell of uniform density.