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physics > Paper Two Physics u > Flashcards

Paper Two Physics u Flashcards

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1
Q

Describe scalar quantities

A

Magnitude with no direction

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2
Q

Examples of scalar quantities

A

Mass, temperatures, speed, energy, distance, time

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3
Q

Describe vector quantity

A

Magnitude and direction

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4
Q

Examples of vector quantities

A

Displacement, weight, force, velocity, acceleration, momentum

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5
Q

How can we represent vectors

A

Arrows and the length shows magnitude, and direction of arrow shows direction of vector

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6
Q

What is a force

A

A push or pull that acts on an object due to the interaction with another object.

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7
Q

What quantity is force and why

A

Vector - has magnitude and direction

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8
Q

What are the two types of force

A

Contact
Non contact

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9
Q

What are examples of a contact force

A

Tension in a rope
Friction
Air resistance
Normal contact force - something exerting a downward force e.g lamp on table, and table doing a force upwards. Direct contact

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10
Q

What is a non contact force

A

Two objects are physically separated.

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11
Q

What are examples of non contact force

A

Gravitational force
Electrostatic force
Magnetic force

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12
Q

What quantity is gravity

A

Vector - magnitude and direction

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13
Q

What is the definition of mass

A

How much matter the object has in it and unit is kg

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14
Q

What type of quantity is mass

A

Scalar as it has no direction

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15
Q

What is weight

A

The force acting on it due to gravity and unit of weight is newtons

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16
Q

What is the gravitational force on earth

A

9.8 N/Kg which is the gravitational field strength

17
Q

What is the relationship between mass and weight

A

Directly proportional

18
Q

How can we determine an objects weight

A

Calibrated spring-balance/newton metre

19
Q

What is the gravitational field strength on the moon

A

1.6 N/Kg

20
Q

What is the centre of mass

A

The weight of an object(the force due to gravity) can be considered to act at a single point.

21
Q

What is the resultant force

A

Single force that has the same effect as all of the original forces acting together

22
Q

What is the free body diagram of an aeroplane

A

Lift
Air resistance-thrust
Weight

23
Q

Describe a free body diagram if the object is moving at a constant velocity

A

The forward and backwards forces must be balanced

24
Q

What is refraction

A

Change in direction due to a change in speed

physics (15 decks)

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