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Physics 2 > P5 > Flashcards

P5 Flashcards

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1
Q

What is the difference between scalar and vector quantities

A

scalar - magnitude
vector - magnitude + direction

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2
Q

Difference between contact and non contact

A

contact - objects are physically touching
non-contact forces - objects are physically separated

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3
Q

Is force scalar or vector

A

vector

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4
Q

Gives examples of contact and non contact forces

A

contact - friction, air resistance
non-contact - magnetic force, gravitational force, electrostatic force

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5
Q

Give two examples of scalar and vector quantities

A

scalar - speed, distance, mass, temperature, time
vector - force, velocity ,displacement, acceleration, momentum

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6
Q

What is an interaction pair

A

pair of forces that are equal and opposite and act on two interacting objects

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7
Q

What two things are directly proportional

A

weight and mass

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8
Q

What are the units for work done

A

Watts

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9
Q

1 newton-meter = how many joules

A

1 joule

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10
Q

What does work done against friction cause

A

a rise in the temperature of the object.

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11
Q

What does elastically deformed mean

A

object being able to go back to its original shape and length after the force has been removed

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12
Q

To stretch, compress or bend an object what is required

A

more than one force acting on the object

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13
Q

How is weight measured

A

a calibrated spring-balance

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14
Q

Define resultant force

A

Overall force acting on an object

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15
Q

What is work done

A

When a force causes an object to move through a distance work is done on the object.

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16
Q

What is elastically deformed
Objects that can be elastically deformed are called what

A

Object can go back to its original shape and length after the force has been removed
Elastic objects

17
Q

What is inelastically deformed

A

Object that doesn’t return to its original shape and length after the force has been removed

18
Q

What is the extension of an elastic object directly proportional to

A

force applied, provided that the limit of
proportionality is not exceeded.

19
Q

What is extension

A

Increase in length of a spring when its stretched

20
Q

What does the spring constant tell us

A

How many newtons it would take to stretch the object by one meter

21
Q

What is Hooke’s law

A

Force and extension are directly proportional

22
Q

When the spring graph starts to curve what does it represent

A

Limit of proportionality - object is inelastically deformed

Physics 2 (4 decks)

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