ENREGY,WORK, MECAHINCAL ENERGY

Luis and Gabriel were helping their friend Karissa move a heavy box in her new apartment. They found out that 45 J of work were done on the box that moved 5 meters. How much force did Luis and Gabriel apply to the box together? (a)  

• 8 N

• 225 N

• 9 N

• 0 N

Tags

NGSS.MS-PS2-2

Selina, Gabriel, and Karissa are playing baseball in a park. Selina hits the ball with a force of 6000 N, and it travels 120 m across the field. What is the ΔKE of the baseball?

• 6000J

• 43560000J

• 720000J

• 50J

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-1

Robert, Luis, and Jose are participating in a bicycle race. If the final change in kinetic energy of the winner is 20,000 J, how much work was done by the winner during the race?

• 0J

• 2041J

• 20,000J

• 4164931J

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

Selina, Karissa, and Stephanie are helping Robert and Valentin move a heavy sofa weighing 200 N into their new apartment. They need to push the sofa over a distance of 426 meters. How much work is being done in this process?

• 85,200 J

• 45,620 J

• 90,480 J

• 62,329 J

Tags

NGSS.MS-PS3-5

Gabriel, Jose, and Stephanie are working on a physics project about energy. They need to calculate the work done in lifting a box. Can you help them determine the SI unit of work? The SI unit of work is (a)   .

• Joules

• Watts

• Newtons

• meters

A 4000-watt motor applies a force of 800 newtons to move a boat at a constant speed. it travels 80 m in 16 seconds?

• true

• false

Tags

NGSS.MS-PS3-5

NGSS.MS-PS2-2

During a physics class, Gabriel, Stephanie, and Robert are discussing about the concept of moving a heavy box across the room. They all agree that the force exerted over the distance to move the box is called (a)   .

• power

• work

• momentum

• Watt

Tags

NGSS.MS-PS3-5

Gabriel, Luis, and Selina are participating in a science fair. Their project involves moving a crate of science equipment 10 meters across the room. They find out that it takes 150 Joules of work to move the crate. What force did they apply? (a)  

• 1500 N

• 15 N

• 1.5 N

• 150 N

Tags

NGSS.MS-PS2-2

Selina, Karissa, and Jose are participating in a school marathon. As they increase their running speed, they observe that they have ________ kinetic energy.

• more

• less

• none of the above

• all of the above

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-1

Selina is holding a basketball on top of a tall building. Gabriel and Robert are observing her from the ground. The gravitational potential energy of the basketball depends on its ________ and ________.

• Height and mass

• Friction and movement

• Mass and Movement

• Height and Friction 

Tags

NGSS.MS-PS3-2