Where will an astronaut have a greater mass? On the moon or on earth?
None: Mass stays the same, it is not affected by gravity.
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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.
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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
Using Weight = Mass x Gravitational field, calculate the weight of a 75kg object on Uranus. (Uranus GFS = 9N/KG)
675N
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10
Give two examples of a non contact force.
Magnetism and gravity.
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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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heart
Other team wins 20 points!
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gift
Win 25 points!
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gift
Win 20 points!
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lifesaver
Give 20 points!
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trap
No points!
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star
Double points!
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shark
Other team loses 20 points!
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banana
Go to last place!
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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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10
Balanced or unbalanced?
Unbalanced
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25
What is air resistance? Give an example where it is useful.
Air resistance is a kind of friction which occurs between air and another object. It is useful to parachutists who use it to slow down their fall.
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seesaw
Swap points!
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rocket
Go to first place!
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fairy
Take points!
5
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25
lifesaver
Give 5 points!
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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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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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20
Describe Newton's third law. Give an example.
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.