Priyanka B Solutions for Chapter: Motion, Exercise 8: Assignment

A body covers a semi-circle of radius $10 \mathrm{cm}$ in $2 \mathrm{seconds}$. Find its speed.

Name a motion where an object does not change its speed but its direction of motion changes continuously. Calculate the speed of tip of a seconds hand watch of length $1.5 \mathrm{cm}$. 

Look at the figure above:

Name the kind of motion of the stone.

Look at the figure above:

Is this an example of accelerated motion? Why?

Look at the figure above:

Name the force that keeps the stone in its path.

Look at the figure above:

What is the direction of its force? Draw in your answer sheet.

Identify the kind of motion in the following cases:

i) A car moving with constant speed turning around a circular path.

ii) An electron orbiting around a nucleus.

An artificial satellite is moving in a circular orbit of radius $36,000 \mathrm{km}$. Calculate its speed if it takes $24 \mathrm{hours}$ to revolve around the earth.