Energy Forms
Work
Work-Energy Theorem
Speed & Kinetic Energy
Calculations
100
The energy of motion...
What is... kinetic energy?
100
Work is the energy transferred to an object by an applied force over a measured...
Where is... distance?
100
In order to stop an automobile safely, the braking system must work to decrease the speed of the vehicle and effectively eliminate its...
What is... kinetic energy?
100
Kinetic energy depends on the mass of the object and its...
What is... speed or velocity? (or the speed/velocity squared)
100
A supermarket employee pushes a bunch of carts at a constant velocity with a force of 100 N. The amount of work done to push the cart 10 m in the same direction as the force is...
What is... 1000 J of energy.
200
It powers your phone, laptop, classroom lights...
What is... electrical energy?
200
The force and the distance moved are in the same direction...
What is... positive work?
200
In the lab, to stop the egg, a surface had to apply a force over some distance. This distance can be seen as...
What is... an indentation?
200
In the lab, both eggs had the same mass, and at the moment before hitting the surface, because they were both dropped from the same height (the smash height), both eggs had the same...
What is... the same speed/velocity, or the same kinetic energy?
200
Imagine a 70.0-kg passenger traveling at a speed of 10 m/s. The person’s kinetic energy will be...
What is... 3500 J of energy?
300
Stored energy due to gravity...
What is... gravitational potential energy?
300
The force is in the opposite direction to the distance moved...
What is... negative work?
300
The type of work that decreases the kinetic energy of an object when a force is applied over the distance (displacement) that the object moves...
What is... negative work?
300
The equation involving mass, velocity, and kinetic energy of an object is KE = mv2/2. Because of the relationship between the kinetic energy and velocity, if a driver decides to triple the velocity, the kinetic energy will be...
What is... nine times more? (or 32 times more)
300
An object is moving with 5000 J of kinetic energy. A force of 500 N is used to try to stop the object. This can be accomplished in a distance of...
What is... 10 m?
400
Stored energy in the chemical bonds of molecules...
What is... chemical potential energy?
400
A force is applied, but NO distance is moved by the object, OR a distance is moved, but NO force is applied...
What is... zero work?
400
The amount of work needed to take away 5000 J of kinetic energy from a moving object...
What is... 5000 J of work?
400
An increase in velocity increases the kinetic energy of a moving object dramatically. If a driver decides to triple the velocity, the braking distance required to bring the vehicle to a stop will increase to...
What is... nine times more braking distance required? (32 times more)
400
The force needed to stop a moving cart in a distance of 5 m with a kinetic energy of 1000 J would be...
What is... 200 N?
500
A physical law that states: When energy changes from one form to another, NO energy is lost...
What is... the law of conservation of energy?
500
An airbag works by applying a smaller force over...
What is... a longer distance.
500
According to the Law of Conservation of Energy, 2000 J of work is needed to take away 2000 J of kinetic energy from a moving object in order to stop it. This can be accomplished with 2000 N of force applied over a distance of 1 m, or it can be accomplished by 200 N of force applied over...
What is... 10 m?
500
When the road is wet or icy, there is less force between the tires and the road. With less force, in order to stop, you will need...
What is... a larger distance to stop?
500
A total of 20,000 J of work is required to stop a 100-kg cart. The speed the cart is traveling before it was brought to a stop would be...
What is... 20 m/s