Physics

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Created by: Alkachifa
Created on: 22-02-22 19:06

Define Velocity

rate of change of displacement

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Define acceleration

rate of change of velocity

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When can suvats be used?

When an object has a constant acceleration

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Describe how the magnitude and direction of air resistance depends on the velocity of the object

Air resistance is air particles acting on an object opposite to its direction. The higher the air resistance the faster the object reaches a terminal velocity as air resistance increases with velocity

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State Newton's First Law

an object will remain at rest or at constant velocity unless acted on by a resultant force

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State Newton's Second Law

The resultant force is directly proportional to the products of its mass and acceleration

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State Newton's Third Law

When object A exerts a force on object B, object B exerts an equal and opposite force on object A

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State the Law of conservation of energy

Total momentum before = Total momentum after in a closed system with no external forces

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What is meant by an elastic collision?

Kinetic energy is conserved, total momentum is conserved

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Explain how crash mats reduce the risk of injury on anyone falling on it

Time taken to crash increases therefore the force when falling onto a crash decreases.

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State the principle of moments

Rotational Equilibrium : Clockwise moments = anticlockwise moments about any point

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State the law of conservation of energy

Energy cannot be created or destroyed only transferred

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Define work done

Work done equals to the force multiplied by the parallel distance to the force

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Other cards in this set

Card 2

Front

Define acceleration

Back

rate of change of velocity

Card 3

Front

When can suvats be used?

Back

Card 4

Front

Describe how the magnitude and direction of air resistance depends on the velocity of the object

Back

Card 5

Front

State Newton's First Law

Back

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Physics