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grade 4 revision 1
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................................... as the stored energy in batteries.
Chemical potential energy
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A child at the top of a playground slide has a kinetic energy.
False
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kinetic energy is the amount of energy that is stored in an object due to its position.
False
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When two objects collide with each other.................... transfer occurs
energy
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If there are ............................ forces acting on an object, so this object will move.
unbalanced
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It is a very heavy steel ball that swings on a cable to help construction workers knock down walls or parts of buildings.
Wrecking ball
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It is the moment when two objects hit or make contact in a forceful way.
collision
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During a crash, airbags ..................... automatically when sensors in the car detect a crash.
inflate
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It is a force that causes an object to move a distance.
Work
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It is the force that pulls objects toward the center of the earth.
Gravity
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Some motions are easy to see, such as rotation of the earth around the sun.
False
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The train has less kinetic energy than the car.
False
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It is push or pull.
Force
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They are used in cars to keep the driver and also the passengers from moving forward when the car stops suddenly.
Seatbelt
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It is any change in the position of an object relative to a fixed point.
Motion
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