Non-contact Forces

Explain the arrangement of iron filings around a bar magnet with the help of a figure.

The weight of the car is $14,400 \mathrm{N}$, and its mass is $\mathrm{X} \mathrm{Kg}$. What is the value of $\mathrm{X}$? (Assume $g=9.8 \mathrm{N} {\mathrm{kg}}^{-1}$).

The Curiosity Mars rover is a car-like mobile laboratory which landed on Mars in August $2012$. The rover has a mass of $900 \mathrm{kg}$. On Mars, $g=3.72 \mathrm{N} {\mathrm{kg}}^{-1}$. Then the weight of Curiosity Rover on Mars is $\mathrm{K} \mathrm{newtons}$. Find the value of $\mathrm{K}$.

Draw a diagram showing the forces that act on a car when it is stationary.

Draw a diagram showing the forces that act on a car when it is travelling at top speed.

Identify the forces that are in action when a magnet sticks to a fridge door.

Identify the forces that are in action when you are sitting on a chair.

Is it possible to tell which pole is which from the pattern of the iron filings?

Why are two bar magnets required to show the field between two poles of the same type?

The Curiosity Mars rover is a car-like mobile laboratory which landed on Mars in August $2012$. The rover has a mass of $900 \mathrm{kg}$. On Mars, $g=3.72 \mathrm{N} {\mathrm{kg}}^{-1}$. Calculate the weight of Curiosity on Mars.

The weight of the car is $14,400 \mathrm{N}$. What is its mass? (Assume $g=9.8 \mathrm{N} {\mathrm{kg}}^{-1}$).

Which two objects are interacting in the following example?

The force of gravity acting on you.

One day car journeys may be possible on the Moon. What statement is correct about the car on the Moon?

The phenomenon by which magnets attract certain substances is called _____.

A magnet attracts.

Magnetic force is a non-contact force.

You have a bag of cotton and an iron bag each containing a mass of $100 \mathrm{kg}$ when measured on a weighing machine. In reality one is heavier than the other. Can you say which one is heavier and why?

The weight of a body depends upon _____.

The force exerted between the magnet and other substances

The force that pulls every object downwards towards the centre of the Earth is called the force of _____.