1.3 Dynamics Flashcards

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1
Q

Newton’s 1st Law

A

If the resultant force on an object is zero then the object will either remain stationary, or if it was already moving, then it will continue to move with uniform motion.

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2
Q

Newton’s 2nd Law

A

F = ma
The force in a direction is directly proportional to the mass multiplied by the acceleration in the direction

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3
Q

Newton’s 3rd Law

A

If body A exerts a force on body B, then body B exerts an equal but opposite force on body A

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4
Q

What are the units for force

A

N, Newton’s

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5
Q

What are the base SI units for N?

A

kgms-2

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6
Q

Weight

A

Is a measure of how large the force of gravity is on an object

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7
Q

Mass

A

Is a measure of how much ‘matter’ or material an object has

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8
Q

Momentum

A

Is the product of mass and velocity

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9
Q

The principle of Conservation of Momentum

A

The total momentum of a system of interacting bodies will remain constant if there are no external forces acting upon the system

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10
Q

What are the units for momentum?

A

kgms-1

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11
Q

In an elastic collision …

A

No kinetic energy is lost

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12
Q

In an inelastic collision …

A

Some kinetic energy of the system is lost to the surroundings

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13
Q

What is the opposite reaction to weight called?

A

Normal Reaction

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14
Q

What is the gradient of a momentum-time graph equal to?

A

Force

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