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| What is the 1st Law of Motion? |
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| If the resultant force acting on an object is zero then the momentum/speed of the object doesnt change |
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| What is the 2nd law of Momentum? |
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| If there is a resultant force then the momentum/speed changes. |
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| When there is no movement forces are _______ and _____ |
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| If an object is moving at a steady speed then forces are _______ and __________ |
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| When there is no movement forces are _______ and _____ |
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| Why would Jet Engines not work in space? |
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because they work by drawing air in and pushing it out, the force pushes the plane forward. But there is no air in space.
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| How does a car move forward? |
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The wheels exert a backwards force on the road, friction stops the wheel from spinning and exerts an equal and opposite force on the on the car which starts moving forward.
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| How is friction different from most other forces? |
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It is responsive; it will change to match the force you resist it with, up to a limit.
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| What forces are acted upon a stationary ball on a table? |
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Gravity is pulling the ball down. The table is pushing the ball up. The forces are equal and opposite
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| A bag is on a seat, the bag squashes the seat until the ______ on the bag is equal to the ________ |
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Until the upwards force on the bag is equal to the downwards force of gravity.
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| What does the gradient represent on a distance/time graph? |
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| What does the gradient represent on a speed/time graph? |
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A tachograph is a device that is fitted to a vehicle to measure how fast and for how long a driver drives. Lorry drivers have to have them to make sure they do not break the law.
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| What does the amount of momentum gained depend on? |
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The size of the force and the length of time it is applied.
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| What is Work measured in? |
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| Energy Transfered is the same as |
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| Gravitational Potential Energy = |
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| Work Done is the same thing as |
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Gravitational Potential Energy
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| When things fall GPE loss = |
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| What do you to do to mass to get weight on planet earth? |
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| REMEMBER MASS IS NOT THE SAME AS WEIGHT |
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| How do you find the gradient of a straight line? |
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Create a triangle and using the axis values divide y value by the x value.
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