You use a ping pong ball to knock your friends water bottle off their desk. The water bottle falls backward, but the ping pong ball also bounces back towards you. Why does this happen?
Newton's 3rd Law: The ping pong ball exerted a force on the water bottle, but the water bottle exerted a force back on the ping pong ball, pushing it back.
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baam
Lose 15 points!
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star
Double points!
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rocket
Go to first place!
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thief
Give points!
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15
A golfer uses his club to hit his ball across the green. Why does the ball accelerate away from the club more than the club moves away from the ball?
The ball has less mass, so the same amount of force that is applied to both causes the ball to move farther.
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15
Two equal forces are exerted in opposite directions on an object. Will the object accelerate?
No - the forces are balanced.
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15
Object A has a mass of 20 kg. Object B has a mass of 50 kg. If they are both pushed with the same force, which will accelerate faster?
Object A
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15
FILL IN THE BLANK: If the forces on an object are ____, the object will not move.
balanced
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15
Person A has a mass of 100 kg. Person B has a mass of 50 kg. What will happen when they collide?
Both will exert equal and opposite forces on one another, but person B will bound backward more than person A because they have less mass.
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eraser
Reset score!
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magnet
Take 20 points!
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fairy
Take points!
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banana
Go to last place!
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seesaw
Swap points!
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rocket
Go to first place!
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gift
Win 25 points!
Okay!
thief
Give points!
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heart
Other team wins 15 points!
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fairy
Take points!
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rocket
Go to first place!
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baam
Lose 10 points!
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15
When a meteor gets near the Earth, it curves toward the Earth. Why doesn't the Earth curve toward the meteor?
Though they are both exerting equal gravitational forces on each other, the Earth is much more massive, and thus does not move.
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15
What type of motion could line C represent - a bird landing in sand, a car accelerating away, a car coming to a sudden stop, or a horse slowing from a trot to a walk?
a car accelerating away
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15
What is the net force on the box in the picture?
100 N to the right
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15
Object A and B both have a mass of 50 kg. If object A accelerates slower than object B, on which object was more force applied?
Object B
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15
Two unequal forces are exerted in opposite directions on an object. Will the object accelerate?
Yes - the forces are unbalanced so the object will move in the direction of the stronger force.
