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15
×
Convert your answer in Q7 to SI unit (kg/m³).
4000 kg/m³
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15
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State the SI unit of mass.
kilogram (kg)
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15
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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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seesaw
Swap points!
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seesaw
Swap points!
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gift
Win 25 points!
Okay!
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banana
Go to last place!
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15
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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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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
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Name one instrument used to measure length accurately.
Vernier caliper / micrometer screw gauge
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15
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From a velocity-time graph, what does the slope represent?
Acceleration
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15
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Define vector quantity. Give one example.
A physical quantity that has both magnitude and direction, e.g. velocity / displacement / force
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boom
Lose 50 points!
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rocket
Go to first place!
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fairy
Take points!
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25
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baam
Lose 25 points!
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15
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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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lifesaver
Give 20 points!
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fairy
Take points!
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25
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shark
Other team loses 20 points!
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banana
Go to last place!
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15
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Define speed.
Distance travelled per unit time.
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15
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Define acceleration.
Rate of change of velocity per unit time.
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15
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A student measures a time interval of 2.5 minutes. Express this in seconds.
150 s
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15
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From a velocity-time graph, what does the area under the graph represent?
Displacement
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