KS3 Forces and effect on movement
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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show | a force is a push or pull movement
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show | newtons
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show | friction, upthrust, air resistance
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name non-contact forces | show 🗑
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show | upthrust is the upward force that a liquid or gas use on a body floating in it.
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Define gravity | show 🗑
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show | friction is a force that slows you down, created when one object rubs against another!
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show | air resistance is the opposite force to movement and air resistance is created by particles!
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Explain why air resistance increases when you move faster? | show 🗑
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show | gravity
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show | air resistance
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When you drive in a car, which force hits against a car? | show 🗑
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Where does upthrust occur? | show 🗑
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Which force keeps us on the ground so we don’t float away? | show 🗑
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In which direction does gravitational force apply | show 🗑
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show | the weight will be the different because only the mass does not change but when you are in space your weight changes it becomes lighter.
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show | air resistance increases as there are more particles to hit you
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show | it enable them to move through water with the least possible water resistance.
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What happens to the air resistance when the parachute is opened | show 🗑
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show | As his speed reduces the air resistance will become less and eventually the forces will be the same again.
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show | forces (air resistance and gravity) are balanced and you are moving at a constant speed.
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show | Weight is the force that pulls you down; mass is the Number of atoms in the body
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What will be different on the moon than on the earth: mass or weight? | show 🗑
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show | Upthrust
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What can you do to make a car go faster? | show 🗑
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show | True
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show | Forces are balanced when they are equal in SIZE but opposite in DIRECTION: the forces cancel each other out.
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When are forces unbalanced? | show 🗑
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show | The Earth
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show | answer is stationary
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show | direction may change, or the object may slow down, or it may accelerate(go faster)
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This person is pushing down on the chair with force of 650N. What other force is acting to make it balanced | show 🗑
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show | Answer: 20N to the left
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A car is moving at a constant speed and the thrust of the engine is 500N forward. How big is the friction? | show 🗑
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show | because the car is moving FASTER, it means that the forces are UNbalanced. So friction is less than 700N backwards.
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show | because the car is moving SLOWER, it means that the forces are UNbalanced. As the car is slowing down, it means that the backwards force is bigger: so friction is more than the thrust of the engine.
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What are the 4 forces on a car moving at a steady/constant speed | show 🗑
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Compare the size of the 4 forces on a car moving at a STEADY/CONSTANT speed | show 🗑
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show | Gravity, Push of the floor
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show | Gravity and Push of the floor are the same SIZE
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ursulinephys
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