Chapter 8 Flashcards

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1
Q

What do vector quantities both have?

A

Magnitude(size) and direction

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2
Q

Name 3 vector quantities :

A
  • velocity
  • acceleration
  • force
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3
Q

When do vector quantities change?

A
  • magnitudes change
  • direction changes
  • magnitude and direction change
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4
Q

What do scalar quantities only have?

A
  • Magnitude (size)
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5
Q

Name 3 scalar quantities?

A
  • distance
  • speed
  • time
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6
Q

When do scalar quantities change?

A

When their magnitude changes

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7
Q

Name 3 contact forces?

A
  • frictional
  • air resistance
  • spring force
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8
Q

Name 3 non-contact forces?

A
  • gravitational force
  • magnetic force
  • nuclear force
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9
Q

What is weight?

A

The force acting on an object due to gravity

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10
Q

What does the weight of an object depend on?

A

The strength of the gravitational field at the location of the object

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11
Q

How do you calculate the weight of an object if you know its mass and the strength of the gravitational field?

A

Weight = Mass (kg) x gravitational Field Strength (N/kg)

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12
Q

What does the amount of work done depend on?

A

The size on the force of an object and the distance an object moves

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13
Q

What is the equation for work done?

A

Work Done (J) = Force (N) x Distance (M)

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14
Q

What is a joule?

A

A measurement for work done or energy

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15
Q

What is a joule derived from?

A

It’s equal to the energy transferred to an object when a force of one newton acts on that object in the direction of its motion through a distance of one metre.

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16
Q

What is 1.00 J in Newton-Metres?

A

1.00 Nm

17
Q

What happens if a force is overcoming frictional forces?

A

All or some of the energy is transferred to heat