Work Power Energy Final Review

How much work is being done with 200 N of force over 426 meters?

• 85,200 J
• 45,620 J
• 90,480 J
• 62,329 J

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

How much work is being done with 200 N of force over 426 meters?

• 85,200 J
• 45,620 J
• 90,480 J
• 62,329 J

If 150 Joules of work is needed to move a box 10 meters, what force was used? 

• 1500 N
• 15 N
• 1.5 N
• 150 N

If you walk up the stairs with the box, why is work being done?

• Because the force and direction are both horizontal

• Because the force is horizontal and the direction is vertical

• Because the force and direction are unrelated

• Because the force and direction are both vertical

Answer explanation

The correct answer is because the force and direction are both vertical, indicating work is being done when walking up the stairs with the box.

What is a wedge based on?

• A circular motion

• An inclined plane

• A lever system

• A pulley system

Answer explanation

A wedge is based on an inclined plane, allowing for the multiplication of force to split objects apart more easily.

What is energy defined as in the context of work?

• The force applied on an object

• The displacement of an object

• The ability, capacity, or capability of a physical system to do work

• The amount of work done by a force of 1 N acting through 1 m

Answer explanation

Energy is defined as the ability, capacity, or capability of a physical system to do work, making it the correct choice.

What is the SI-derived unit used to measure energy, work, and quantity of heat?

• Newton

• Watt

• Joule

• Pascal

Answer explanation

The SI-derived unit used to measure energy, work, and quantity of heat is the Joule. It is the correct choice for this question.

When does kinetic energy emerge?

• During the dormant state of an object

• When energy is being stored

• During the active process of work

• After work has been completed

Answer explanation

Kinetic energy emerges during the active process of work, as it is the energy possessed by an object due to its motion.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS3-3

What must occur for work to be done, as per the learning material?

• A force must be applied without movement

• Displacement must occur without force

• A force must cause displacement

• Movement must occur without force

Answer explanation

For work to be done, a force must cause displacement according to the learning material.

How is work (W) calculated ?

• W = F + d

• W = F / d

• W = F x d

• W = F - d

Answer explanation

Work (W) is calculated by multiplying the force (F) applied to an object by the distance (d) over which the force is applied, so the correct formula is W = F x d.