Question

E. Name the type of motion seen in the following cases.
1. Earth moving about its axis.
2. Apple falling from a tree.
3. Needle in a sewing machine.
4. Bumble bee.
5. Motion of a football.​

Answer 1

$\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}$

1. ● Uniform Motion.
2. ● Curvilinear motion.
3. ● Oscillatory motion.
4. ● Curvilinear motion.
5. ● Random motion.

Answer 2

The types of motion seen in the following cases:

${ \red{ \bf{ Case \: 1: }}}$

Earth moving about its axis.

${ \green{ \bf{ Motion:}}}$

Rotatory motion and also Periodic motion

${ \orange{ \bf{ Explanation: }}}$

Rotatory motion is a kind of motion in which the body rotates along its own axis or path, periodic motion refers to the motion which occurs in fixed time intervals. Thus, the moving of the earth is considered as rotatory as well as periodic motion.

${ \red{ \bf{Case \: 2: }}}$

Apple falling from a tree.

${ \green{ \bf{ Motion: }}}$

Projectile Motion

${ \orange{ \bf{ Explanation: }}}$

A projectile is any object thrown by the exertion of a force. So, the falling of an apple from a tree is considered as a projectile motion.

${ \red{ \bf{ Case \:3:}}}$

Needle in a sewing machine.

${ \green{ \bf{ Motion:}}}$

Periodic motion

${ \orange{ \bf{ Explanation: }}}$

As we know that in a sewing machine the needle is vibrated periodically, so it is a periodic motion.

${ \red{ \bf{ Case \:4: }}}$

Bumblebee.

${ \green{ \bf{ Motion:}}}$

Descending or Ascending motion

${ \orange{ \bf{ Explanation:}}}$

In a bumblebee its abdomen is in either in ascending motion or in descending motion so it is considered as an ascending or descending motion.

${ \red{ \bf{ Case \: 5:}}}$

Motion of a football.

${ \green{ \bf{ Motion:}}}$

Random or translatory motion

${ \orange{ \bf{ Explanation: }}}$

When a football is kicked either it will go random or it will go straight as and translatory motion show the motion of a football is considered as random or translatory motion.