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Energy, work, power

Description

Quiz on Energy, work, power, created by Nicole Saville on 01/12/2014.
Nicole Saville
Quiz by Nicole Saville, updated more than 1 year ago
Nicole Saville
Created by Nicole Saville almost 10 years ago
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Resource summary

Question 1

Question
What is internal energy?
Answer
  • when an object has speed
  • the movement of particles
  • the random movement of molecules and the attractive forces between them when they're together

Question 2

Question
What is chemical energy
Answer
  • 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

Question 3

Question
What is energy?
Answer
  • the ability to do work
  • the work done by a force
  • work done per unit time

Question 4

Question
Which of these are examples of potential energy?
Answer
  • chemical
  • electrical potential
  • electromagnetic
  • gravitational potential
  • nuclear
  • internal
  • sound
  • kinetic

Question 5

Question
What is a kinetic type of energy?
Answer
  • where movement is taking place
  • regions where electric, magnetic, gravitational or nuclear forces exist

Question 6

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

Question 7

Question
What is the equation for kinetic energy?
Answer
  • 1/2mv^2
  • mgh
  • mgv
  • 1/2mv

Question 8

Question
What is energy measured in?
Answer
  • Joules
  • Newtons/metre
  • Joule metre/second

Question 9

Question
What is work done?
Answer
  • focre / distance
  • force x distance moved in the direction of force
  • force x energy
  • energy x distance
  • force / time

Question 10

Question
Work done is the energy transferred when a force is mode through a distance
Answer
  • True
  • False

Question 11

Question
What is power and what is it measured in?
Answer
  • work done/ time taken
  • watts
  • joules
  • work done x time

Question 12

Question
One watt is the power generated when one joule of energy is transferred to an object.
Answer
  • True
  • False

Question 13

Question
What is weight?
Answer
  • The gravitational force on an object
  • mass x gravity
  • the mass of an object

Question 14

Question
What is terminal velocity?
Answer
  • 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

Question 15

Question
At terminal velocity:
Answer
  • 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

Question 16

Question
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.
Answer
  • True
  • False

Question 17

Question
The larger the mass, the smaller the terminal velocity
Answer
  • True
  • False

Question 18

Question
What is stopping distance?
Answer
  • 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

Question 19

Question
Factors that increase thinking distance:
Answer
  • under the influence of alcohol or other drugs
  • tiredness
  • distractions
  • high speed
  • weather
  • intelligence

Question 20

Question
The work done to stop an object will be equal to the change in kinetic energy of the object
Answer
  • True
  • False

Question 21

Question
Factors that increase breaking distance
Answer
  • high speed
  • mass of vehicle
  • road conditions
  • car conditions
  • driver distractions
  • alcohol/drugs
  • tiredness

Question 22

Question
If speed of a car doubles:
Answer
  • kinetic energy quadruples
  • work done quadruples
  • breaking distance quadruples

Question 23

Question
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.
Answer
  • True
  • False

Question 24

Question
What is trilateration?
Answer
  • using four satellites together to determine the position of something
  • The distance from a satellite to the earth
  • The orbit of a satellite
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