Energy Work & Power

At the start of a ski jump, a skier begins at rest at the top of a hill. What types of energies are present?

• Kinetic
• Gravitational
• Kinetic & Gravitational
• Gravitational & Internal

As the skier goes down the hill, ________ energy increases while _______ energy decreases.

• Gravitational; Kinetic
• Kinetic; Gravitational
• Elastic; Kinetic
• Kinetic; Elastic

A 24 Newton force was used to push a crate a distance of 4 meters. Calculate the work done on the crate.

• 6 Joules
• 28 Joules
• 96 Joules
• 60 Joules

Bro A bench presses 145-lbs five times in 20 seconds.
Bro B bench presses 145-lbs five times in 10 seconds.

• Bro A did more work.
• Bro B did more work.
• Both Bros did the same amount of work.
• Bro

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is the energy of position or shape that depends on weight and height, also called stored energy?

• Energy
• Kinetic energy
• Potential energy
• Sound energy

What is the law that states that energy cannot be created or destroyed only transform form one energy to another?

• Law of Conservation of Energy
• Law of Gravity
• Law of Inertia
• None of these

What kind of energy is in a moving car.

• Potential
• Kinetic

Energy is the ability to do _____________ or cause change.

• work
• rest
• experiments
• science

Power is:

• How fast work is done.
• A force applied through a distance.
• Work out divided by work in multiplied by 100.
• Everything.

In which of the following situations do your arms do work on books?

• holding a heavy stack of books while standing
• carrying a heavy stack of books
• dropping a stack of books onto a table
• picking up a pile of books from the floor

Tags

NGSS.MS-PS2-4