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WorksheetsFORCE WORK & ENERGY
Total questions: 40
Worksheet time: 40mins
Identify the simple machine in the given image.
Wedge
Wheel & Axle
Pulley
Inclined Plane
The 2 simple machines being used in the image are
wheel & axle, inclined plane
wedge, pulley
inclined plane, lever
wedge, lever
The energy conversation from 2 to 1 is
chemical energy to potential energy
kinetic energy to potential energy
potential energy to kinetic energy
kine energy to chemical energy
Which of the following is/are non-contact force(s)?
Elastic Force
Gravitational Force
Magnetic Force
All of these
In which of the following work is NOT done?
All of these
State True or False.
- Gravity supports in climbing hills.
- Shadow is the longest at noon.
- Shadows are light coloured at nights.
T, F, T
T, T, T
F, F, T
F, F, F
Which of the following is/are translucent?
Butter paper
Tracing paper
Frosted glass
All of these
Which thing is NOT required to form a shadow?
Screen
Transparent object
Light Source
Opaque object
State True or False.
- Sound is a form of energy.
- Sound travels in straight line.
- Translucent objects form a dark shadow.
T, F, F
T, F, T
T, T, F
F, F, F
Which of the following is an unpleasant sound?
Chirping of birds
Soft music
Crying of child
Singer singing in tune
Which of the following is a luminous object?
Moon
Earth
Asteroid
Star
When is a shadow formed?
When the object is transparent
When the opaque object is at the back of light source
When an opaque object blocks the path of light
When there is no screen
Read both statements carefully.
- Sound is produced by reflection of sound waves.
- Sound travels the fastest in gases.
Both statements are true.
First statement is true & the second one is false.
First statement is false & the second one is true.
Both statements are false.
Which of the following is NOT the effect of force?
Change in the shape of an object.
Change in the direction of an object.
Change in the colour of an object.
Change in the speed of an object.
State True or False.
Elastic Force is a contact force. Sound travels the slowest in vacuum.
F, T
T, T
T, F
F, F
Which force OPPOSES motion?
Gravitational Force
Elastic Force
Frictional Force
Magnetic Force
Which of the following is a non-luminous object?
None of these
State True or False.
- A shadow is always black in colour.
- Translucent objects make dark shadows.
- Shadow is the shortest at breakfast time.
F, F, T
T, T, F
F, T, F
T, F, F
Which of the following is NOT an opaque object?
Window screen
Mirror
Brick
None of these
Sound travels the slowest in ______________.
Solids
Liquids
Gases
Vacuum
Read both the statements carefully.
- We are not able to see objects because light travels in a straight line.
- Echo is produced when an object reflects the sound waves.
Both statements are false.
Both statements are true.
First statement is false & the second statement is true.
First statement is true & the second statement is false.
What is the direction of gravitational force?
Upwards
Sideways
Downwards
None of these
We are able to walk due to __________ force.
Gravitational
Magnetic
Frictional
Both gravitational & frictional force
How can you reduce your effort in 1st class lever?
By reducing the distance between load & fulcrum
By increasing the distance between load & fulcrum
By increasing the distance between effort & fulcrum
Both A & C
Anita picked 2 sacks-one containing 1 kg of stones & another containing 1kg of feathers. In the lifting of which sack will she have to apply more force?
1 kg of stones
1 kg of feathers
Both will require same force
None of these
Identify the incorrect group.
Axe, razor, knife
Bicycle pedal, screwdriver, steering wheel
Wheelbarrow, scissors, skateboard
None of these
State True or False.
- Hydro electricity is generated from wind.
- Geothermal energy comes from the burning of petroleum.
- Machine parts need to be oiled regularly for increasing friction.
T, T, F
F, F, F
T, F, T
F, F, T
Look at the image carefully & answer the following.
Force acting from upward direction is buoyant force
Force acting from downward direction is buoyant force
Force acting from downward direction is gravitational force
Force acting from upward direction is frictional force
What energy conversions will take place when a car goes up the slope?
Chemical energy➡️Kinetic + Sound energy➡️Potential energy
Chemical energy➡️Sound energy➡️Potential energy
Chemical energy➡️Potential + Sound energy➡️Kinetic energy
Muscular energy➡️Kinetic + Sound energy➡️Potential energy
Echo is produced by ________
reflection of light waves
vibration of sound waves
vibration of light waves
None of these
Select the incorrect statement.
Flagpole is a fixed pulley
Screwdriver is a wheel & axle
Nutcracker is a first class lever
None of these
Which of the following are 3rd class levers?
Stapler, crowbar
Fishing rod, hammer
Tweezer, stapler
Tongs, ramp
Which of the following do not have chemical energy stored in them?
Batteries
Fossil fuels
Plants
None of these
What energy conversions will take place when we switch on a light bulb?
Chemical energy➡️Sound energy➡️Light energy
Electric energy➡️Sound + Heat energy
Electric energy➡️Light + Heat energy
Chemical energy➡️Light + Heat energy
Which form of energy has the lowest energy?
Heat energy
Light energy
Chemical energy
Sound energy
Select the correct statement.
Potential energy of an object is more at the 2nd floor as compared to 3rd floor
Chemical energy is stored in coal
Decibel is used to measure light
All of these
Bottle cap is/an ___________.
inclined plane
wedge
screw
wheel & axle
Claw hammer is __________.
2nd class lever
1st class lever
3rd class lever
None of these
Rohan was trying to lift a stone with a 1st class lever.
His effort moved closer to the fulcrum. Then he shifted the load away from the fulcrum.
Select the incorrect option.
In the 1st case, his effort will increase
In the 2nd case, his effort will increase
In both cases, his effort will reduce
All of these
Which are the 2 types of mechanical energy?
Kinetic & Muscular
Kinetic & Potential
Potential & Electrical
Potential & Elastic
