What simple machine is used to lift the lid of a soda bottle?
Lever
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15
How does friction affect the movement of a sliding object?
Friction slows down the sliding object.
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15
What is the purpose of a wedge?
A wedge is used to split or cut objects.
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10
What is an example of an inclined plane in everyday life?
A ramp
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20
Describe a real-life example where potential energy is converted into kinetic energy.
A roller coaster at the top of a hill has maximum potential energy. As it descends, the potential energy is converted into kinetic energy, increasing its speed.
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15
What do you need to do to start moving a heavy object?
Apply a force to it.
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15
What is kinetic energy?
Kinetic energy is the energy of an object due to its motion.
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thief
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fairy
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rocket
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baam
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15
What is potential energy?
Potential energy is the energy stored in an object due to its position or state.
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15
What force pulls objects toward the Earth?
Gravity.
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15
What happens to an object when you push it harder?
It moves faster
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15
Why does an object move easily in a smooth surface than rough surface?
An object moves more easily on a smooth surface and more slowly on a rough surface due to increased friction
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monster
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fairy
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rocket
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thief
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How does an inclined plane reduce the effort needed to lift an object?
By allowing the object to be moved up a gradual slope instead of being lifted vertically, spreading the effort over a longer distance.
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10
What simple machine would you use to lift a bucket from a well?