G.5..FORCE, WORK & ENERGY..2021

G.5..FORCE, WORK & ENERGY..2021

Do you know that for any work we use force?

Fill in the Blank

A _____________________ is pull or push that acts on an object.

Multiple Select

Tick the effects of forces from the following.

• Move an object

• Grow an object

• Change the shape of an object

• Stop a moving object

Multiple Choice

Which image displays the effect of force changing the shape of an object?

Multiple Choice

which of the following work is done by the muscular force?

• Riding a bike

• Earth revolving around the sun

• Slipping on stairs

Fill in the Blank

_______________________ force is needed to walk on any surface.

Multiple Select

Identify the gravitational force from the images given below.

Multiple Choice

Which of the following work cannot be done without friction?

• Flying

• Writing

• Sleeping

HIGHLIGHTS PAGE. NO: 79 & 80

LOOKING BACK ACTIVITY - PAGE. NO : 81

Multiple Choice

Which force makes the material go back to its original state?

• Gravitational force

• Mechanical force

• Elastic force

• Frictional force

Fill in the Blank

We need to apply force to do _______________________.

Multiple Choice

Which image shows that more work is being done?

Multiple Select

Machines are the tools that make our work ____________ and ______________.

• difficult

• easy

• delay

• effortless

Multiple Select

Identify the complex machines from the following.

Fill in the Blank

Machines that are made up of very few parts are called ________________________ machines .

Multiple Choice

In a lever the force applied to move a load is called as ___________________ .

• Load

• Fulcrum

• Effort

• Lever

Multiple Choice

Which is the fixed point in a lever?

• Effort

• Fulcrum

• Rod

• Load

HIGHLIGHTS - PAGE. NO: 81 & 82

Multiple Choice

Which lever has a fulcrum in the center?

• First class lever

• Second class lever

• Third class lever

Multiple Select

Identify a second class lever from the following.

Fill in the Blank

Fulcrum-effort-load: represents _____________________ type of lever.

Multiple Choice

A fishing rod is an example of which class of lever?

• First class

• Third class

• Second class

Multiple Choice

Identify the second class lever from the following.

• Load-fulcrum-effort

• Fulcrum-effort-load

• Fulcrum-load-effort

Fill in the Blank

________________ is a slope that helps to move the load with less effort.

Multiple Choice

Two inclined planes make a __________________.

• lever

• wedge

• fulcrum

Multiple Choice

The winding road on a mountain is an example of:

• Wedge

• Inclined plane

• Both

HIGHLIGHTS - PAGE . NO: 83 & 84

Fill in the Blank

Which simple machine looks like a nail with grooves?

Multiple Select

Identify the simple machines with inclined planes in them.

• Wedge

• Nail

• Screw

• Chisel

• Pulley

Multiple Choice

The Screwdriver is an example of which simple machine?

• Pulley

• Wedge

• Wheel and Axel

Multiple Choice

What do you call a grooved wheel with the rope passing around it?

• Wheel and axel

• Pulley

• Screw

• Wedge

Fill in the Blank

____________________ reduces the effort by changing the direction of the force.

LOOKING BACK ACTIVITY - PAGE : 86

HIGHLIGHTS - PAGE.NO: 85 & 86

Fill in the Blank

___________________ is the ability to do work

Multiple Choice

Which energy helps us see things when it is reflected?

• Heat energy

• Sound energy

• Light energy

• Electrical energy

Multiple Choice

Which energy is generated when objects vibrate?

• Sound energy

• Light energy

• Heat energy

Fill in the Blank

When things are burned we get _________________ energy.

Multiple Choice

Sound energy can be transferred through:

• Solid, liquid and gas

• Only liquid

• Only liquid

• Only gas

Fill in the Blank

Water falling from a higher level will have _____________ energy.

Multiple Select

The windmill can be used for the following:

• To produce sound

• To generate electricity

• To get wind

• To grind grains

Fill in the Blank

Water energy is also called as _______________.

Multiple Choice

Identify the source of solar power.

• Wind

• Water

• Sun

• Earth

Multiple Choice

Geothermal energy is present inside the ________________.

• Sun

• Earth

• Water

• Wind

Multiple Choice

Which of the following energy is not good for our environment?

• Electrical energy

• Solar energy

• Wind energy

HIGHLIGHTS - PAGE. NO: 86,87,& 88

LOOKING BACK ACTIVITY - PAGE: 88