Nicole Saville
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Quiz on Energy, work, power, created by Nicole Saville on 01/12/2014.

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Nicole Saville
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Energy, work, power

Question 1 of 24

1

What is internal energy?

Select one of the following:

  • when an object has speed

  • the movement of particles

  • the random movement of molecules and the attractive forces between them when they're together

Explanation

Question 2 of 24

1

What is chemical energy

Select one of the following:

  • energy can be released when the arrangement of atoms is altered

  • energy can be released by reorganising the protons and neutrons in an atoms nucleus

  • where an object is at a high level in the earth's gravitational field

Explanation

Question 3 of 24

1

What is energy?

Select one of the following:

  • the ability to do work

  • the work done by a force

  • work done per unit time

Explanation

Question 4 of 24

1

Which of these are examples of potential energy?

Select one or more of the following:

  • chemical

  • electrical potential

  • electromagnetic

  • gravitational potential

  • nuclear

  • internal

  • sound

  • kinetic

Explanation

Question 5 of 24

1

What is a kinetic type of energy?

Select one of the following:

  • where movement is taking place

  • regions where electric, magnetic, gravitational or nuclear forces exist

Explanation

Question 6 of 24

1

The conservation of energy is: In a closed system, energy may be converted form one form into another but never created or destroyed

Select one of the following:

  • True
  • False

Explanation

Question 7 of 24

1

What is the equation for kinetic energy?

Select one of the following:

  • 1/2mv^2

  • mgh

  • mgv

  • 1/2mv

Explanation

Question 8 of 24

1

What is energy measured in?

Select one of the following:

  • Joules

  • Newtons/metre

  • Joule metre/second

Explanation

Question 9 of 24

1

What is work done?

Select one of the following:

  • focre / distance

  • force x distance moved in the direction of force

  • force x energy

  • energy x distance

  • force / time

Explanation

Question 10 of 24

1

Work done is the energy transferred when a force is mode through a distance

Select one of the following:

  • True
  • False

Explanation

Question 11 of 24

1

What is power and what is it measured in?

Select one or more of the following:

  • work done/ time taken

  • watts

  • joules

  • work done x time

Explanation

Question 12 of 24

1

One watt is the power generated when one joule of energy is transferred to an object.

Select one of the following:

  • True
  • False

Explanation

Question 13 of 24

1

What is weight?

Select one or more of the following:

  • The gravitational force on an object

  • mass x gravity

  • the mass of an object

Explanation

Question 14 of 24

1

What is terminal velocity?

Select one or more of the following:

  • the velocity at which an objects drag equals its acceleration force

  • for free fall - when weight = drag

  • the fastest possible velocity

  • when you're accelerating

Explanation

Question 15 of 24

1

At terminal velocity:

Select one or more of the following:

  • kinetic energy is constant

  • the GPE is transferred to the surrounding air as heat

  • The loss in KE is the work done by the drag force

Explanation

Question 16 of 24

1

The larger the surface area of an object, the smaller the terminal velocity because there is more drag so you don't accelerate as much before drag = weight.

Select one of the following:

  • True
  • False

Explanation

Question 17 of 24

1

The larger the mass, the smaller the terminal velocity

Select one of the following:

  • True
  • False

Explanation

Question 18 of 24

1

What is stopping distance?

Select one of the following:

  • The time taken for a car to stop

  • The total instance a car travels from the moment the driver sees a hazard

  • The time taken from the moment the driver has pressed the break

Explanation

Question 19 of 24

1

Factors that increase thinking distance:

Select one or more of the following:

  • under the influence of alcohol or other drugs

  • tiredness

  • distractions

  • high speed

  • weather

  • intelligence

Explanation

Question 20 of 24

1

The work done to stop an object will be equal to the change in kinetic energy of the object

Select one of the following:

  • True
  • False

Explanation

Question 21 of 24

1

Factors that increase breaking distance

Select one or more of the following:

  • high speed

  • mass of vehicle

  • road conditions

  • car conditions

  • driver distractions

  • alcohol/drugs

  • tiredness

Explanation

Question 22 of 24

1

If speed of a car doubles:

Select one or more of the following:

  • kinetic energy quadruples

  • work done quadruples

  • breaking distance quadruples

Explanation

Question 23 of 24

1

An air bag works by:
deflated nylon bag attached to a crash sensor which measures acceleration and detects when you are breaking very sharply. It releases two chemicals which react rapidly and produce nitrogen gas which inflates the airbag.

Select one of the following:

  • True
  • False

Explanation

Question 24 of 24

1

What is trilateration?

Select one of the following:

  • using four satellites together to determine the position of something

  • The distance from a satellite to the earth

  • The orbit of a satellite

Explanation

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