While Robert was helping his father in the garden, he pushed a shovel into the ground to dig a hole in the dirt. He picked up a shrub, carried it to the hole, and held it while he lowered it into the hole. During which parts of this process does Robert NOT do work? CHOOSE 2!!!

• when he pushed a shovel into the ground to dig a hole

• when he picked up a shrub

• when he carried the shrub to the hole

• when he held the shrub before lowering it into the hole

Marcus is hanging a porch swing on his front porch. The first thing he has to do is attach two springs to the ceiling. Then, he has to fasten the swing to the springs so that they can stretch and support the weight of the swing. What two types of potential energy do the springs have? CHOOSE 2!!!!

• elastic

• gravitational

• kinetic

• stretched

Tags

NGSS.MS-PS3-2

Jaime has a 20-N bird feeder on a 2-m pole in his yard. The gravitational potential energy (GPE) of the bird feeder is the result of?

• its elasticity

• the gravitational pull of earth

• its kinetic energy

• its speed and mass

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

Ali rolled a ball down a hill it had a potential energy of 3 and a kinetic energy of 2. What is the mechanical energy of the ball? (ME = KE + PE)

• 0 J

• 5 J

• 20 J

• 4 J

Chloe is training for her first half-marathon, which requires her to run 21.1 km. Before she runs, she carefully chooses the foods that will give her the energy her body requires for the race. She stands still at the starting line, then starts running, her body warming up as she runs. Which TWO energy transformations take place in this example? CHOOSE 2!!!

• chemical energy to kinetic energy

• chemical energy to thermal energy

• mechanical energy to potential energy

• thermal energy to mechanical energy

Tags

NGSS.MS-PS3-5

As of 2017, the tallest roller coaster in the world is the Kingda Ka, located at Six Flags Great Adventure in Jackson, New Jersey. It stands 139 meters tall, and, at one point, the cars drop 127 meters! Roller coasters are a great way to investigate energy. Look at the diagram of a roller coaster below and answer the following questions. At what point on the track does the car have the greatest potential energy and the greatest kinetic energy?

• greatest potential energy: at the ending point; greatest kinetic energy: at the starting point

• greatest potential energy: at the starting point; greatest kinetic energy: at the ending point

• greatest potential energy: at the highest point on the track; greatest kinetic energy: at the lowest point on the track

• greatest potential energy: at the lowest point on the track; greatest

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A wrecking ball swings from a crane toward a brick wall. A group of students decide to also test three additional wrecking balls against the brick wall. The results of the test show that each wrecking ball achieves a different maximum speed at the bottom of its swing, as shown. Out of the four wrecking balls based on speed alone which has the highest kinetic energy?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Four students are each pushing on one side of a box. Mara is pushing to the west, Cindi is pushing to the east, Chris is pushing to the north, and Sammy is pushing to the south. If the box moves to the east, which student does work on the box?

• Mara

• Cindi

• Chris

• Sammy

Tags

NGSS.MS-PS2-2

Marissa uses a cart to haul flowers at her job as a landscaper. She pushes a 12-kilogram cart a distance of 6 meters with a force of 25 Newtons. How much work does she do? W=F x D

• 4.25 N/m

• 12.50 N·m/kg

• 150.00 N·m

• 1800.00 N·m·kg

Chad’s family just moved into a new home. The sun went down as Chad was moving boxes into the house, so he had to turn on a light to see. Which statements are true about the power Chad used? CHOOSE 2!!!

• The power he used to move the boxes can be found by determining the rate at which work was done on the boxes.

• The power Chad used to move the boxes is the force he used times the distance he moved them.

• The power of the light Chad turned on is the amount of energy changed from electricity to light.

• The power of the light Chad turned on is the amount of energy transferred per time.

Tags

NGSS.MS-PS3-5