Tuesday , October 27 2020

NCERT 5th Class (CBSE) Science: Force and Energy – Simple Machine

Question: What is force?

Answer: A push or pull acting on an object is called force.

Question: What is gravity?

Answer: The force that attracts objects towards the center of the earth is called gravity.

Question: What is magnetism?

Answer: The push or pull applied by a magnet on metals like iron and nickel and on other magnets is called magnetism.

Question: What is energy? Name any four types of energy.

Answer: The ability to do work is called energy. The four types of energy are heat energy, light energy, wind energy and sound energy.

Question: What is a machine?

Answer: A machine is a tool that makes our work easier by helping us overcome a larger force (load) by applying lesser force (effort).

Question: Name the six types of simple machines.

Answer: The six types of simple machines are:

1. Lever
2. Pulley
3. Wheel and axle
4. Wedge
5. Screw
6. Inclined plane

Question: List the four effects that force have on objects.

Answer: The four effects that force have on objects are:

1. A force can make a stationary object move or make a moving object move faster.
2. A force can make a moving object stop or slow down.
3. a force can change the direction in which an object is moving.
4. A force can change the shape of an object.

Question: What is friction? Why is friction necessary?

Answer: The force that tries to stop the sliding movement of objects across a surface is called friction. Friction is necessary because friction between or feet and ground makes it possible for us to walk.

स्वामी की दादी 5th NCERT CBSE Hindi Book Rimjhim Ch 13

स्वामी की दादी 5th Class NCERT CBSE Hindi Book Rimjhim Chapter 13 प्रश्न: “सच? राजम बड़ा बहादुर …