Which ball has more friction? The top ball or the bottom ball?
Top ball
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15
Mention 2 advantages of friction.
Any 2: allows objects to remain still, allows us to grip things and walk, prevents slipping, allows moving objects to stop, produces heat to start a fire.
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15
Is friction useful for doing ice skating?
No
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eraser
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gift
Win 25 points!
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gift
Win 10 points!
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thief
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15
What causes friction?
Friction is caused when the surfaces of two objects are in contact.
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15
Friction is a force that acts in an ___________ direction of movement.
opposite
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15
What is a force?
A push or pull applied to an object.
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15
Bea is squeezing her red ball. What is the effect of force shown in this movement?
Force can change the size and shape of an object.
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thief
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seesaw
Swap points!
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rocket
Go to first place!
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baam
Lose 25 points!
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15
True or False: Heavier objects require more force to move and stop.
True
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15
Who will go faster? A or B?
A. Because it has less friction.
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15
True or False: Friction speeds up moving objects.
False (Friction slows things down)
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15
Which type of force shown in the picture?
A pull
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15
Andy is kicking a moving soccer ball. What is the effect of forces on the ball?