Field Forces

A man weighing $60 \mathrm{kg}$ is in a lift moving down with an acceleration of $1.8 \mathrm{m} {\mathrm{s}}^{-2}$. The force exerted by the floor on him is

What are field forces explain?

A man weighing $60 \mathrm{kg}$ is in a lift moving down with an acceleration of $1.8 \mathrm{m} {\mathrm{s}}^{-2}$. The force exerted by the floor on him is

Which surface offers more friction?

Smooth surface offers more resistance than the rough surface.

How does irregularities of surface effects friction?

The force of friction is greater in rough surface than the smooth surface.

Friction is caused by the irregularities of two surfaces in contact.

Gravitational force is an example for field force.

Define electric field force. Write any two properties of it.

A magnetic field force occurs only with the physical contact between two objects.

Field force acts even when the bodies are not in contact.

What are the properties of gravitational field force?

Name the British scientist who proposed the concept of magnetic field lines.

Select the correct statement.

Name the force exerted by animals and humans by their muscle strength.

Choose from the following (muscular force/ frictional force).

Unscramble the following to make a meaningful word:
AMENGCIT.   

Take a look at the planet models shown in the picture. Which planet will have a greater gravitational force- Earth or Mars?

Which of the following games need strong muscular force?

A few iron pins are kept on a plastic plate. What will happen if a horse-shoe magnet is also kept on the same plastic plate?