Possible answers: gravitational force, magnetic force, and/or electric force (among others)
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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
Why is the front of a car designed to crumple during a crash?
It increases the amount of time it takes for the crash to happen, which decreases the acceleration, which decreases the amount of force from the impact.
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seesaw
Swap points!
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rocket
Go to first place!
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rocket
Go to first place!
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banana
Go to last place!
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15
If a hovercraft is moving with an acceleration of 6 m/s2 and a 52 kg person is onboard, how much force is being applied?
312 N
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monster
Reset all scores!
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gold
Win 50 points!
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gift
Win 15 points!
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baam
Lose 20 points!
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15
You are riding in a car with your family. The car is going 50 km/hr. How fast are you moving relative to your family?
0 km/hr - you are all traveling at the same speed, so compared to them, you are not moving
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15
TRUE or FALSE: One golf ball is moving and one is still. When they collide, both balls exert forces on each other in opposite directions, even though one isn't moving.
TRUE
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boom
Lose 50 points!
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gold
Win 50 points!
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gift
Win 15 points!
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lifesaver
Give 25 points!
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15
Amber hikes 10 miles East then 5 miles West. The trip takes her 5 hours. What is her velocity?
1 mile per hour East
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15
Why does a hockey puck move more easily on ice than cement?
There is less friction on the ice because the surface is smoother.
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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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15
Amber hikes 10 miles East then 5 miles West. The trip takes her 5 hours. What is her distance?
15 miles
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15
A frog jumps off of a lily pad, which is in the water, onto a rock. Which will move - the lily pad, the rock, or both, and in which direction?
The lily pad will move away from the rock.
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15
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.
