Every action has an equal and opposite reaction. e.g. stepping off a boat and the boat pushes back or a rocket pushing air down so that it goes up.
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20
Describe the difference between mass and weight.
Mass is a measurement of how much matter or "stuff" is in an object. Weight is a measurement of the gravity acting on the object.
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heart
Other team wins 10 points!
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shark
Other team loses 25 points!
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shark
Other team loses 10 points!
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thief
Give points!
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15
What factors can affect the friction on an object?
The surface (rough or smooth), the weight (heavy or light), surface area
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25
What is Newton's first law? Give an example to support your answer.
An object will not change its motion unless a force acts on it (object in rest will stay at rest) e.g people flying forward when a car stops quickly.
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monster
Reset all scores!
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gift
Win 25 points!
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fairy
Take points!
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lifesaver
Give 15 points!
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10
Are the forces balanced or unbalanced?
Balanced
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25
What is upthrust? What keeps it balanced?
The upward force that a liquid puts on an object floating in it. The weight of the object balances the upthrust.
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25
Using Weight = Mass x Gravitational field, calculate the weight of a 75kg object on Uranus. (Uranus GFS = 9N/KG)
675N
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5
How does surface area affect air resistance?
The greater the surface area, the greater the air resistance.
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15
What is net/resultant force? What does it show us?
Net or resultant force is the sum of all the forces acting on an object. It shows us whether the object will accelerate in any direction or remain still.
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5
Balanced or unbalanced?
Balanced
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monster
Reset all scores!
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fairy
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rocket
Go to first place!
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banana
Go to last place!
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20
Who discovered gravity and how?
Isaac Newton discovered gravity when he saw an apple fall straight down from a tree and wondered why it didn't fall sideways or upwards.
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25
Which direction will the people move? Why?
They will move to the left because the force is unbalanced.
