Using Weight = Mass x Gravitational field, calculate the weight of a 50kg person on the moon. (Moon GFS = 1.6N/KG)
80N
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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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10
What are mass and weight measured in? Give an answer for each.
Mass in KG, Weight in Newtons
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5
Balanced or unbalanced?
Balanced
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10
Give two examples of a non contact force.
Magnetism and 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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trap
No points!
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magnet
Take 15 points!
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fairy
Take points!
5
10
15
20
25
baam
Lose 10 points!
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10
Balanced or unbalanced?
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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10
Are the forces balanced or unbalanced?
Unbalanced. It will move to the left.
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heart
Other team wins 15 points!
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rocket
Go to first place!
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shark
Other team loses 5 points!
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thief
Give points!
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25
thief
Give points!
5
10
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25
rocket
Go to first place!
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fairy
Take points!
5
10
15
20
25
baam
Lose 20 points!
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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.
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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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gift
Win 25 points!
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gift
Win 20 points!
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lifesaver
Give 10 points!
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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.