SCIENCE CLASS 5 – MORE ABOUT FORCE, ENERGY AND SIMPLE MACHINES QUESTIONS

Differentiate between:
b) Fixed pulley and a Movable pulley

• Simple Machines:

• Machine

• Energy:

• Magnetic Force:

• Electrostatic Force:

• Frictional Force:

• Gravitational Force:

• Elastic Force:

What is Mechanical Force ?

What is Muscular Force ?

What is Force

Write short notes on the following:

c) Mechanical energy

Write short notes on the following:
b) Hydro energy

Write short notes on the following:
a) Sound energy

Give reason: All hospitals have inclined plane.

What is a screw? Why does a screw hold the wood more firmly than a nail?

Differentiate between:
a) Second-class lever and Third-class lever

What is a lever? What are the three components in a lever? Support your answer with
diagrams

State any three advantages of friction

Give reasons
2) Rubbing of comb on dry hair can attract paper pieces on the comb

Give reasons:
1) Soles of shoes have grooves but wheels on skates have no grooves.

How does friction work? What are the disadvantages of friction?

Differentiate between: Muscular force and Mechanical force.

What kind of change can a force bring about?