Unit 5.2 explore 2 review

When is a skate boarder at rest position?

• Where is at the top of the hill

• When the skateboarder is not moving

• When there is zero potential energy

• When the skateboarder is sleeping

What happens to objects with potential energy when you release them?

• They will move from a condition of high potential energy to one of low potential energy

• They will move from a position of high kinetic energy to a position of low kinetic energy

• They will slow to a complete stop

• They will move from rest position to a position of high potential energy

What happens when potential gravitational energy is released?

• It will store more energy

• The force of gravity does work on it

• The objects will lift off the ground

• The gravitational potential energy gets stronger

What does the amount of gravitational energy depend on?

• Matter and weight of an object

• Size and matter of an object

• Gravity and volume of an object

• Height and mass of an object

What is the equation used to find potential energy?

• PE = mph

• PE = KE@W

• PE = mgh

• KE + PE = 100%

How much potential energy is there in a spring when it is at equilibrium position?

• Zero

• 25%

• 50%

• 100%

What will happen when you release a stretched spring with a mass attached to it?

• The mass will gain more potential energy

• The mass will do work on the spring to make it stretch to the maximum

• The spring will do work on the mass to move it to its rest position

• The springs energy will change from kinetic to potential

When you move two like charged particles close to each other what happens to the repulsive (repulsive means to push apart) force between them?

• It gets weaker

• It will get stronger

• It will fade away

• It will change it to unlike charges

How is stored chemical energy released?

• The nucleus of two atoms are combined

• The bonds between atoms and molecules are broken

• The energy flows as electrons through a wire

• The nucleus of an atom is split

What happens when we break or combine the nucleus of an atoms?

• A large amount of energy is released

• The world would end

• That can’t happen

• A large amount of energy is stored