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Physics Y8 May test
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What is the weight of the water displaced when the block is fully immersed in water?
2kg
Name the principle shown in the diagram above
Archimedes principle
Boats float because _____________ are colliding with the bottom of the boat
water particles
Things float because _________ is at least equal to the weight of the object
Upthrust
Name point B on the lever
Pivot/Fulcrum
Name point C on the lever
Effort
Name point A on the lever
Load
A box with a cat is 50kg what is the weight of the box in N?
500N
Why do we need to convert mass into weight?
Weight is mass interaction with gravity, which is the accurate force the mass exerts
Explain how a balloon maintains its shape.
Air particles are colliding with the balloon wall
In a cool morning, the balloon becomes smaller, what happened to the air pressure in the balloon in the cool weather?
Decreases
A balloon is squeezed, what happens to the air pressure?
It increases
A spring is 2cm long, after hanging a 2N weight, it becomes 3.5cm long. What is the extension of the spring
1.5cm
A spring is 2cm long, after hanging a 2N weight, it becomes 3.5cm long. How long is the spring if a 4N weight is hung on?
5cm (2cm+3cm)
Name of the physics law related to springs
Hooke's Law
The point where the extension of the spring no longer increases proportionally to the weight.
Elastic limit
When a car is accelerating, the thrust is _________ than the drag
more than
When a car is moving at a steady speed, the thrust is _________ to the drag
equal to
When a car is slowing down, the thrust is _________ than the drag
less than
What will happen to the box?
Move to the right
State the unit to measure forces
Newtons (N)
State the equipment to measure forces
Newton Meter
How far did the car travel in this chart? (distance)
100km
Describe the speed in this distance time graph
Stationary, Not moving