Shobhita Johari, Pankaj Tyagi and, Parminder Chopra Solutions for Exercise 4: EXERCISES

How can we use spring balance to measure the weight of an object?

Why a push or a pull is considered a force? Give examples to support your answer.

A boy is riding a bicycle. Identify forces or actions involved in the process.

Two forces ${\mathrm{F}}_1$ and ${\mathrm{F}}_2$ act on an object towards the left and two forces ${\mathrm{F}}_3$ and ${\mathrm{F}}_4$ act towards the right. Determine the magnitude of the resultant force of an object. Can you tell me on what factors will the direction of resultant force depend?

When we stop pedalling a bicycle, it comes to rest after some time. Describe the forces responsible for the change in the state of motion of the bicycle.

Suppose there are two teams (team A and B) playing tug of war. Team A is pulling with a force of $90 \mathrm{N}$ and team B is pulling with the force of $100 \mathrm{N}$. What will be the force acting applied by both the teams? Which team do you think will win finally?

Space does not have gravitational force, so how do you think astronauts survive there? How do they eat and sleep in space? Does the Moon have gravitational force? What is the difference between the Moon and Earth in terms of force?

A 'push' can change position, the direction of motion, speed, shape and size of an object. Find out examples from your daily life to justify this statement.