EASY
4th CBSE
IMPORTANT
Earn 100

What is the main source of energy on the earth?

50% studentsanswered this correctly

Important Questions on Force, Work and Energy

MEDIUM
4th CBSE
IMPORTANT
Mastering SCIENCE Integrated with Environmental Education 4..>Chapter 11 - Force, Work and Energy>Exercises>Q E
Give any four effects of force.
MEDIUM
4th CBSE
IMPORTANT
Mastering SCIENCE Integrated with Environmental Education 4..>Chapter 11 - Force, Work and Energy>Exercises>Q E
When a wall is pushed, it does not move from its place. Is any work done in this situation? Why/Why not?
MEDIUM
4th CBSE
IMPORTANT
Mastering SCIENCE Integrated with Environmental Education 4..>Chapter 11 - Force, Work and Energy>Exercises>Q E

Rishabh's mother seldom uses LPG and electrical equipment, and mostly uses solar energy for cooking and heating purposes. Rishabh has convinced his friends and neighbours also to do so.

What is solar energy?

MEDIUM
4th CBSE
IMPORTANT
Mastering SCIENCE Integrated with Environmental Education 4..>Chapter 11 - Force, Work and Energy>Exercises>Q E

Rishabh's mother seldom uses LPG and electrical equipment, and mostly uses solar energy for cooking and heating purposes. Rishabh has convinced his friends and neighbors also to do so.

What value does Rishabh's mother show by using solar energy?

MEDIUM
4th CBSE
IMPORTANT
Mastering SCIENCE Integrated with Environmental Education 4..>Chapter 11 - Force, Work and Energy>Exercises>Q E
What is gravitational force?
MEDIUM
4th CBSE
IMPORTANT
Mastering SCIENCE Integrated with Environmental Education 4..>Chapter 11 - Force, Work and Energy>Exercises>Q E
What is the force of friction?
MEDIUM
4th CBSE
IMPORTANT
Mastering SCIENCE Integrated with Environmental Education 4..>Chapter 11 - Force, Work and Energy>Exercises>Q E
What are simple machines? Name the types of simple machines.
MEDIUM
4th CBSE
IMPORTANT
Mastering SCIENCE Integrated with Environmental Education 4..>Chapter 11 - Force, Work and Energy>Exercises>Q F
Why is friction essential for us?