The velocity of a moving object is its displacement per unit time. It is a vector quantity and is measured in metres per second (ms-1).
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Card 7
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The acceleration of an object is its rate of change of velocity. It is measured in metres per second squared (ms-2). It is a vector quantity.
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Card 8
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This is the unit of force. 1 N is the force which gives a mass of 1 Kg an acceleration of 1 ms-2
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Card 9
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This is the turning effect due to a couple. It is measured in Newton metres (Nm).
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Card 10
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The moment of a force is the turning effect due to a single force. It is calculated by multiplying the force by the perpendicular distance from a given point. The units are Newton metres. (Nm)
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Card 11
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This is the distance travelled by a vehicle from seeing the need to stop to applying the brakes.
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Card 12
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The distance a vehicle travels while decelerating to a stop. This is the distance travelled after the brakes have been applied.
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Card 13
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This is the thinking distance added to the braking distance.
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Card 14
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The product (multiplied together) of a Force and the distance moved in the direction of the force gives the work done by the force. It can also be thought of as the energy converted from one form into another. The unit is Joules. (J)
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Card 15
Front
This is the unit of energy. It is the work done when a force of 1 N moves its point of application 1 m in the direction of the force.
