Day 8 of Work, Mechanical Advantage, and Simple machines

Day 8 of Work, Mechanical Advantage, and Simple machines

Multiple Choice

The Ability to do work

• Soil 
• Energy 
• Matter
• Math

Multiple Choice

At which point during the roller coaster ride is the potential energy the lowest?

• A

• B

• C

• D

Multiple Choice

What is happening to the gravitational potential energy as the car travel up the hill?

• increasing

• decreasing

• staying the same

Multiple Choice

At what position does the pendulum have the greatest gravitational potential energy?

• Position D
• Position C
• Position B

​Gravitational Potential Energy Practice Problem

​9a.)A 1200 kg climber on top of a hill that is 42 m high.

​Gravitational Potential Energy Practice Problem

​9b.)A 65 kg climber on top of Mount Everest (8,800 meters high)

​Gravitational Potential Energy Practice Problem

9c.) A 0.52 bird kg bird flying at an altitude of 550m.

Multiple Choice

Which of the following is the correct equation for calculating an object's gravitational potential energy?

• PE = mgh

• PE = mg / h

• PE = mg + h

• PE = gh

Multiple Choice

How could you increase the gravitational potential energy of an object without changing its mass and gravity?

• Make the object larger

• Lower the object towards the ground

• Raise the object farther off the ground

• Allow the object to roll on the ground

Multiple Choice

Calculate the potential energy of a rock with a mass of 55 kg while sitting on a hill that is 35 m high

• 18,865 J

• 1,925 J

• 9,625 J

• 336,875 J

Kientic Energy Practice Problem

13a.) A 1500 kg car that is moving at a speed of 11.66 m/s.

Kientic Energy Practice Problem

13b.) A 35 kg child has 190J of energy after sledding down a hill. What is his speed?

Kientic Energy Practice Problem

13c.) A bowling ball traveling at 2.0 m/s has 16 J of energy. What is its mass?

Multiple Choice

Energy due to motion is ____________ energy. 

• Potential 
• Energy
• Kinetic
• Friction

Multiple Choice

The faster an object moves, the ________ kinetic energy it has. 

• more
• less
• none of the above
• all of the above 

Multiple Choice

As mass increases, KE ...

• increases
• decreases
• stays the same

Multiple Choice

Calculate the kinetic energy of a moving 4 kg object travelling at a velocity of 3 m/s.

• 18 J
• 36 J
• 12 J
• 6 J