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15
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When two like charges approach, they feel a force of attraction or repulsion?
Repulsion
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trap
No points!
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gold
Win 50 points!
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fairy
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25
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lifesaver
Give 20 points!
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15
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Define a vector
A quantity with both size and direction, e.g. a force
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How do we represent vectors in diagrams?
As arrows, arrow have size and direction.
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The forces on this car are balanced. There is no resultant force. Therefore the car is stationary [True/false]
False, the drag force shows the car is moving at a constant velocity
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If the forces on an object are balanced, what will be happening to the object's motion?
The object will be moving at a constant velocity or stationary.
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Define a scalar
A quantity with size only.
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What causes the Earth's tides?
The gravitational pull of the moon
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monster
Reset all scores!
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shark
Other team loses 25 points!
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rocket
Go to first place!
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thief
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15
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Is friction a contact or non contact force?
Contact
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How does a jet engine create forward thrust?
The turbine pushes air backwards. The backward force has an equal and opposite reaction, pushing the plane forwards.
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What does the "resolution" of a piece of measuring equipment mean?
Resolution is the smallest increment on the scale of a piece of equipment.
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An ice hockey player pushes another ice hockey player. What will happen to the motion of both players?
Both players will move backwards due to Newton's third law.
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Is gravity a contact or non contact force?
Non contact
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eraser
Reset score!
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gift
Win 20 points!
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gift
Win 20 points!
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lifesaver
Give 20 points!
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15
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What is the resultant force on this trolley and in which direction?
0N
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