Laws of Motion — Physics STD 11 Science — Question

What is the order of magnitude of 0.00006?

Does the escape velocity vary with mass?

It is easier to pull lawn roller than to push it. Why?

The kinetic energies of light and heavy object are equal. Whose momentum will be greater?

When a body is weighed on an ordinary balance we demand that the arm should be horizontal if the weights on the two pans are equal. Suppose equal weights are put on the two pans, the arm is kept at an angle with the horizontal and released. Is the torque of the two weights about the middle point (point of support) zero? Is the total torque zero? If so, why does the arm rotate and finally become horizontal?

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 an applied force on a body moving on a rough horizontal plane with uniform velocity.

A wire is stretched by a certain amount under a load. If the load and radius both are increased to four times, find the stretch caused in the wire.

If the sum of all the forces acting on a body is zero, is it necessarily in equilibrium? If the sum of all the forces on a particle is zero, is it necessarily in equilibrium?

Which waves will be formed in a resonance tube?