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x Standard Grade Physics > TRANSPORT Forces At Work > Flashcards

TRANSPORT Forces At Work Flashcards

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0
Q

What is force measured in?

A

Newtons

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1
Q

What are the effects if force?

A

Can change speed, shape and direction of an object.

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2
Q

What does a Newton balance measure?

A

Force

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3
Q

How does a Newton balance measure force?

A

The spring becomes longer when force is applied to the balance. The length of spring is proportional to the force applied.

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4
Q

What is weight?

A

The force on an object due to earths gravitational pull

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5
Q

What is weight measured in?

A

Newtons BECAUSE IT IS A FORCE

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6
Q

What is mass?

A

The amount of matter that makes up an object

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7
Q

What is mass measured in?

A

Kg

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8
Q

What is friction?

A

A force that opposed motion of an object

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9
Q

Give an example of friction

A

Air resistance which opposes an objects movement through air.

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10
Q

How could you increase friction?

A

Breaks, parachute, rubber shoes for rock climbing.

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11
Q

How could you decrease friction?

A

Streamlined cars, oiling moving parts in an engine, using an air cushion on a air hockey table.

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12
Q

What are balanced forces?

A

Where equal forces act in opposite directions (equal to no forces at all)

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13
Q

What is Newton’s first law?

A

When balanced forces act on an object it remains at rest or continues at a steady speed in a straight line.

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14
Q

What is the effect of balanced forces on an object?

A

Remains at rest or travels at a steady speed in a straight line.

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15
Q

Explain into worms of forces why seat belts are used in cars.

A

When a car breaks there is a force which acts against the car causing it to slow down. The passenger will move forward at a constant speed (N1L). A seatbelt is used to provide a force in the opposite direction causing rapid deceleration of the passenger.

16
Q

What happens to acceleration if the mass of an object increases but force remains at a constant rate?

A

Deceleration occurs

17
Q

What happens to the object if the mass stays constant and force increases?

A

Acceleration occurs.

18
Q

How can a car be made to reduce friction?

A

Reducing front areas not carrying a roof rack, havering door mirrors instead of wing mirrors

19
Q

What is Newton’s second law?

A

When an object is acted on by a constant unbalanced force, the body over with constant acceleration in the direction of the unbalanced force. Or f=ma

20
Q

What is inertia?

A

An objects reluctance to change motion

21
Q

What is inertia dependant on?

A

Mass

x Standard Grade Physics (29 decks)

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