Force and Motion

Work and Energy

by

VIII STD. STUDENT

GOVERNMENT HIGH SCHOOL, VISWANATHAM,

SIVAKASI,

VIRUDHUNAGAR DIST.

Force and Motion

To move something by

using force against it.

Examples of Pushing:

Getting out of bed

Rowing a rowboat

Knocking a box off a shelf

Closing a door

Opening a can of soda

To move somethingtoward or nearer by

using force.

Examples of Pulling:

Removing a nail from the wall

Lifting a box from the floor

Opening a truck door

Drinking out of a straw

Dispalcement

Types of Forces

Muscular force Frictional force Gravitational force (Attractive force) Electric force Magnetic force Nuclear force

Muscular force

Frictional force

Gravitational force (Attractive force)

Electric forces

Magnetic forces

Motion

Straight line motion Circular motion Uniform motion

Non-uniform motion Oscillatory motion

Non-uniform motion

Oscillatory motion

Work Simple machines Levers

First order Second order Third order

Energy Potential energy Kinetic energy

Chemical energy Light energy

Sound energy Magnetic energy Electric energy

Radiant ElectricalChemical

Thermal Nuclear

Magnetic

Sound

Mechanical

Kinetic Energy Potential Energy

Mechanical energy

Examples of Mechanical Energy

Electrical energy

Chemical energy

What type of energy cooks food in a microwave oven?ELECTROMAGNETIC

ENERGY

What type of energy is the spinning plate inside of a microwave oven?

MECHANICAL ENERGY

Electrical energy is transported to your house through power lines.

When you plug an electric fan to a power outlet, electrical energy is transform into what type of energy?

MECHANICAL ENERGY

What energy transformation occurs when an electric

lamp is turned on?

ELECTRICAL ENERGY

ELECTROMAGNETIC ENERGY

Mechanical and Thermal Energy(Don’t forget friction)

Chemical Energy

Electrical, Mechanical andElectromagnetic Energy

Chemical Energy

Energy Transfer

Chemical

Electrical

Electrical

Electrical

Sound(mechanical)

Light(Electromagnetic)

ThermalMechanical

Solar Cooker

Thirumala Tirupati Devasthanam