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Force and Simple Machines (Part 1) Class 5 Notes Science

Force 

To do any work, we need to apply force. A force can make things move. When a force moves something, work is done. A push or pull applied to an object is called force. 

Example: A boy pulling a toy car, a boy pushing the paddles of a bicycle and a lady drawing water from a well.

Force and Simple Machines (Part 1) Class 5 Notes Science

Effects of Force

  • A force can move a stationary object. 
  • A force can also make a moving object move faster when applied in the direction in which the object is moving.
  •  A force can change the direction of a moving object. 
  • A force can stop a moving object. 
  • A force can slow down a moving object when applied in the opposite direction to which the object is moving.
  •  A force can change the shape of an object.

Question for Detailed Notes: Force & Simple Machines (Part 1)
Try yourself:
What is the effect of a force on a stationary object?
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Types of Forces

  • Gravitational force or Gravity: The force that attracts objects to the center of the Earth is called gravitational force or gravity. Gravity is a force that makes things fall to the ground.

Force and Simple Machines (Part 1) Class 5 Notes Science

  • Magnetic force or magnetism: The force by which a magnet pushes or pulls iron objects or another magnet is called magnetic force.

Force and Simple Machines (Part 1) Class 5 Notes Science

  • Muscular force: When we push or pull something, we are applying muscular force.

Muscular Force applied on the TableMuscular Force applied on the Table

  • Electrostatic force: Some materials when rubbed with other materials get charged. These charged materials either attract or repel other objects. This happens because of the electrostatic force.

Force and Simple Machines (Part 1) Class 5 Notes Science

  • Friction or frictional force: The force that acts between two objects when they are in contact with each other is called friction. Friction stops or slows down the movement of objects across a surface.

Force and Simple Machines (Part 1) Class 5 Notes Science

Energy

To do any work, we need energy. Energy is the ability to do work. There are many forms of energy. 

Types of Energy

  • Light energy: Light energy helps us to see things. Sun, electric bulb, tube light and candle are some sources of light.Force and Simple Machines (Part 1) Class 5 Notes Science
  • Heat energy: Heat is a form of energy. Apart from sun, we get heat energy by burning of fuels like coal, kerosene, LPG (Liquefied Petroleum Gas) and wood.

Force and Simple Machines (Part 1) Class 5 Notes Science

  • Sound energy: Radio, television, loudspeakers, horns and musical instruments are sources of sound. Living things like humans, birds and animals also produce sound.

Force and Simple Machines (Part 1) Class 5 Notes Science

  • Electrical energy: Appliances like fan, computer, washing machine and television use electrical energy. Electricity is generated at power stations and supplied to our homes through wires.

Force and Simple Machines (Part 1) Class 5 Notes Science

Question for Detailed Notes: Force & Simple Machines (Part 1)
Try yourself:
Which force is responsible for making objects fall to the ground?
View Solution

  • Mechanical Energy: The energy possessed by an object due to its position or its movement is called mechanical energy. It is of two types – potential energy and kinetic energy. Potential energy is due to the position of an object and kinetic energy is due to the movement of an object.

Force and Simple Machines (Part 1) Class 5 Notes Science

Sun is the greatest source of energy on Earth. It gives us heat and light. We also get energy from moving water, wind, and burning fuels.

The document Force and Simple Machines (Part 1) Class 5 Notes Science is a part of the Class 5 Course Science Class 5.
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FAQs on Force and Simple Machines (Part 1) Class 5 Notes Science

1. What is force?
Ans. Force is a push or pull that can cause an object to move, stop, or change direction.
2. How is force related to energy?
Ans. Force can transfer energy to an object, causing it to move and do work.
3. What are simple machines?
Ans. Simple machines are basic mechanical devices that can make work easier by changing the direction or magnitude of a force.
4. How do simple machines help in reducing the amount of force needed to do work?
Ans. Simple machines help in reducing the amount of force needed to do work by either increasing the distance over which the force is applied or changing the direction of the force.
5. What are the different types of simple machines?
Ans. The different types of simple machines include the lever, pulley, wheel and axle, inclined plane, wedge, and screw.
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