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Forces and speed revision > Forces > Flashcards

Forces Flashcards

1
Q

What is a Newton Meter?

A

A piece of equipment used to measure weight in newtons.

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2
Q

What is a force?

A

A push or a pull.

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3
Q

What is tension?

A

A stretching force

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4
Q

What is weight?

A

The force that pulls objects towards the centre of the Earth

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5
Q

What is thrust?

A

A push caused by an engine.

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6
Q

What is friction?

A

The force between two surfaces sliding over one another, that causes them to heat up and wear.

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7
Q

What is a contact force?

A

A force that acts when an object is in contact with a surface, air or water.

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8
Q

What is gravity?

A

A non-contact force that acts between two masses.

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9
Q

Unbalanced forces means ….

A

Opposing forces on an object that are unequal/ not in equilibrium.

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10
Q

Density means …

A

The amount of particles within a certain volume.

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11
Q

Hooke’s Law states that …

A

The force on an object is directly proportional to its extension.

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12
Q

Mass is …

A

The amount of matter an object is made up of.

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13
Q

The unit of weight is ..

A

Newtons(N)

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14
Q

The unit of mass is …

A

kilograms(kg), grams(g), tonnes

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15
Q

Air resistance is …

A

The force on an object moving through the air that causes it to slow down (also known as drag).

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16
Q

Water resistance is …

A

The force on an object moving through water that causes it to slow down (also known as drag).

17
Q

Extension means …

A

The amount by which an object gets longer when a force is applied.

18
Q

The unit for density is …

A

g/cm³

19
Q

A streamlined object is one that …

A

Is shaped to reduce resistance to motion from water to air.

20
Q

What is the Earth’s gravitational field strength?

A

9.8 N/kg

21
Q

What is lift?

A

A force pushing upwards on an object flying in the air.

22
Q

What is upthrust?

A

A force pushing upwards on an object in a liquid.

23
Q

True or false: Mass is a force.

A

False - Weight is a force, not mass

24
Q

True or false: Mass does not depend on the gravitational field strength.

A

True

25
Q

True or false: An object floats if it has a greater density than the liquid it is in.

A

False - it would sink.

26
Q

True or false: Air resistance is a type of friction.

A

True

27
Q

True or false: Weight does not depend on the gravitational field strength.

A

False

Forces and speed revision (2 decks)

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