Force, Work and Energy - Class 4 - Science
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Questions & Answers - Force, Work and Energy | Living Science | Science | Class 4
Tick ✅ the correct answer.
A moving body slows down or stops on its own due to this force.
a. gravitational
b. elastic
c. mechanical
d. frictional
The correct answer is d. frictional.
Frictional force is the force that opposes the motion of a body as it moves across another surface, causing it to slow down or eventually stop.
Tick ✅ the correct answer.
This is used to open lids.
a. pulley
b. lever
c. wheel and axle
d. inclined plane
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Sign up nowName five simple machines.
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Sign up nowHOTS Questions - Force, Work and Energy | Living Science | Science | Class 4
Which action would need more physical energy?
a. riding a bicycle on a level road
OR
riding a bicycle up a hill
b. walking on the road
OR
jogging in the park
c. doing your homework
OR
playing football
Let's think about which activities need more physical energy:
a. Riding a bicycle up a hill requires more energy compared to riding on a level road because you have to work against gravity to go uphill.
b. Jogging in the park requires more energy than walking on the road because jogging involves faster movement and higher physical activity.
c. Playing football requires more energy than doing your homework. Playing football is a physically demanding activity that involves running, kicking, and quick movements, whereas doing homework is mostly a sitting activity with mental exertion.
Name the kind of force being used in each case. There might be more than one type in some cases.
Arun bowled the fifth ball of the over. Ajay hit it to the boundary for a four.
The doorbell rang. Stella ran to the door.
The cup fell from Shaan's hands and broke into pieces.
The stone rolled down the slope and fell into the river.
Ali dropped the bat. It fell on the floor with a thud.
Granny cut a piece of cloth into two with a pair of scissors.
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