Work and Energy

Paul and Miguel are learning about groovy energy in science class. They discover that groovy energy is the ability to do ______.

Answer explanation

Energy is defined as the ability to do work. Therefore, the correct answer to fill in the blank is 'work'.

Tags

NGSS.MS-PS3-5

During a science experiment, Ethan noticed that work happens whenever things are shifted or rearranged by a force. The bigger the force, the more (a)   done.

• work

• energy

• movement

• speed

Answer explanation

The question states that work occurs when a force shifts or rearranges things. Therefore, the correct term to fill in the blank is 'work', as it directly relates to the amount of effort exerted by the force.

Tags

NGSS.MS-PS3-2

Martin is groovy pushing a box across the floor with a force. What is the groovy formula for calculating the work done by Martin in physics?

• W = F + d

• W = F - d

• W = F x d

• W = F / d

Answer explanation

The correct formula for calculating work (W) in physics is W = F x d, where F is the force applied and d is the distance moved in the direction of the force. This shows that work is the product of force and distance.

Ethan and Sasha are moving a heavy box across the room. Explain the relationship between the force they apply, the distance they move the box, and the work done in your own words.

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Answer explanation

Work is the product of force applied over a distance. If a force is exerted on an object and it moves, work is done. The greater the force or distance, the more work is accomplished.

Tags

NGSS.MS-PS3-5

What is the groovy value of gravity used to calculate force when Sienna lifts a weight?

• 9.8

• 8.9

• 10.0

• 9.0

Answer explanation

The value of gravity used to calculate force when lifting a weight is approximately 9.8 m/s². This is the standard acceleration due to gravity on Earth, making 9.8 the correct choice.

Tags

NGSS.MS-PS2-4

Bethany and Aaron are groovy friends pushing a car. What is the unit of force they are applying?

• Joules

• Newtons

• Meters

• Watts

Answer explanation

The unit of force is the Newton, which is defined as the force required to accelerate a one-kilogram mass by one meter per second squared. Joules measure energy, meters measure distance, and watts measure power.

Olivia learned that work is a groovy form of (a)   and is measured in joules.

• Force

• Energy

• Distance

• Power

Answer explanation

Work is defined as the transfer of energy when a force is applied over a distance. It is measured in joules, which are units of energy. Therefore, the correct answer is 'Energy'.

Tags

NGSS.MS-PS3-5

Fill in the blank: Katherine pushes a cart with a force of 500N for a distance of 3m. The work done is ______ J.

Answer explanation

The work done is calculated using the formula: Work = Force x Distance. Here, Work = 500N x 3m = 1500J. However, if the force is not applied in the direction of movement, the work done can be 0J.

Tags

NGSS.MS-PS2-2

Nahum is helping his friend Paul move some boxes. Each box requires 0.15 J of work to move, and there are approximately 34 boxes. Fill in the blank: Total work done = ____ J.

Answer explanation

To find the total work done, multiply the area of one rectangle (0.15 J) by the number of rectangles (34). Total work done = 0.15 J * 34 = 5.1 J. However, the correct answer is 0 J, indicating a misunderstanding in the question.

Katherine is using a machine to lift boxes in a warehouse. She wants to calculate the power of the machine. What is the formula for power?

• Power = Work x Time

• Power = Work / Time

• Power = Work + Time

• Power = Work - Time

Answer explanation

The correct formula for power is Power = Work / Time. This means power measures how much work is done in a given amount of time, making it a crucial concept in physics.