Chemical energy stores, Kinetic energy stores, Gravitational potential energy stores, Elastic potential energy store and Thermal energy stores.
1 of 24
What happens to an object thrown into the air?
When an object is thrown into the air, the object slows down as it goes up. The energy is transferred from the object's kinetic energy store to its gravitational potential energy store.
2 of 24
What is work done?
Work done is what happens to an object when an object is moved by a force.
3 of 24
What is work done equal to?
Work done is equal to the amount of energy transferred to the object.
4 of 24
What does work done depend on?
Work done depends on the size of the force and the distance moved.
5 of 24
How do you calculate work done?
work done= force applied x distance moved along the line of action of the force
6 of 24
The force you need to lift an object at a constant velocity is equal to?
It is equal to the gravitational force on the object.
7 of 24
What happens to an object when it is moved upwards?
When an object is moved upwards, the energy in its gravitational potential energy store increases.
8 of 24
What does the energy of an object depend on?
The energy of an object depends on its mass and speed. This energy is called kinetic energy.
9 of 24
How do you calculate the amount of kinetic energy in an object?
kinetic energy= 1/2 x mass x speed
10 of 24
How do you calculate the amount of elastic potential energy in an object?
elastic potential = 1/2 x spring constant x entension
11 of 24
What is useful energy?
Useful energy is energy transferred to where it is wanted in the way that it is wanted.
12 of 24
What is wasted energy?
Wasted energy is the energy that is not usefully transferred.
13 of 24
What is dissipation?
Energy that is spread out and stored in less useful ways.
14 of 24
What does friction cause in machines?
In machines, friction causes energy to be wasted
15 of 24
What happens when you exercise?
As you're exercising, energy is transferred to the thermal energy stores of your muscles.
16 of 24
Where does wasted energy get dissipated to?
Wasted energy gets dissipated to the surrounding. For example, the gears of a car get hot because friction where the car is running.
17 of 24
When does energy become less useful?
Energy becomes less useful the more is spreads out.
18 of 24
What is the energy supplied to the device called?
The energy is called the input energy.
19 of 24
How do you work out the efficiency?
efficiency=useful output energy/ total input energy
20 of 24
What are the three main energy supplies in the home?
Electricity, gas and oil.
21 of 24
What does the power of an appliance do?
The more powerful an appliance is, the faster the rate at which it transfers energy.
22 of 24
What is the power of an appliance measured in?
The power of an appliance is measured in watts.
23 of 24
How can you calculate the power of an appliance?
power= energy transferred/ time taken for energy to be transferred
24 of 24
Other cards in this set
Card 2
Front
What happens to an object thrown into the air?
Back
When an object is thrown into the air, the object slows down as it goes up. The energy is transferred from the object's kinetic energy store to its gravitational potential energy store.
Comments
No comments have yet been made