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15
×
A car travels 100 m in 20 s. Calculate its average speed.
100 ÷ 20 = 5 m/s
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15
×
A force of 30 N acts on a 6 kg object. Find acceleration.
a = F ÷ m = 30 ÷ 6 = 5 m/s²
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15
×
State the SI unit of mass.
kilogram (kg)
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15
×
Why does a wooden block float on water while a metal block sinks?
Because density of wood < density of water, while density of metal > density of water.
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15
×
Define vector quantity. Give one example.
A physical quantity that has both magnitude and direction, e.g. velocity / displacement / force
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15
×
State Newton’s Second Law of Motion.
The force on an object is equal to the rate of change of momentum / F = ma.
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trap
No points!
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seesaw
Swap points!
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rocket
Go to first place!
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banana
Go to last place!
Oops!
15
×
Name one instrument used to measure length accurately.
Vernier caliper / micrometer screw gauge
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15
×
State the formula for density.
density = mass ÷ volume
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seesaw
Swap points!
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seesaw
Swap points!
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gift
Win 25 points!
Okay!
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lifesaver
Give 15 points!
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15
×
Differentiate between mass and weight.
Mass is the amount of matter in an object (kg, scalar), weight is the force of gravity on the object (N, vector).
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15
×
A student measures a time interval of 2.5 minutes. Express this in seconds.
150 s
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15
×
From a velocity-time graph, what does the area under the graph represent?
Displacement
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15
×
How do you determine the volume of an irregular solid object?
Use displacement method (measure volume of water displaced in measuring cylinder).
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15
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State the difference between speed and velocity.
Speed is scalar (no direction), velocity is vector (includes direction).
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thief
Give points!
5
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15
20
25
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gift
Win 25 points!
Okay!
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rocket
Go to first place!
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lifesaver
Give 20 points!
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