The Kinetic Energy Of Objects Up Or Slowing Down Flashcards
Define elastic potential energy
Elastic potential energy is stored in the object when work is done on the object to change its shape
Describe the relationship between force and extension in hookes law
The extension of a spring or wire is directly proportional to the force acting on it
Define work done
When a force causes an object to move through a distance work is done
Define gravitational potential energy
The energy that an object has due to its position in gravitational field
What is regenerative braking
A process where a cars kinetic energy is transferred to electrical energy to slow the car down
What two factors make up the overall stopping distance of a car?
Thinking distance
Braking distance
State three factors that will increase the braking distance of a car
Speed
Worn brakes
Weather conditions
State three factors that will increase the thinking distance of a car
Speed
Tiredness
Alcohol
Drugs
State the conservation of momentum
The momentum before the collision will be the same as the momentum after the collision
Explain how all of the following safety features act to reduce injury: air bag, crumple zone, seat belt
Increase the time taken for the object to stop thereby reducing the rate of change of momentum
Define power
Energy transferred per second
What is one watt equal to?
1 joule per second
