Work Review

What is work? Choose TWO correct answers.

• Force applied PERPENDICULAR to the motion of an object

• A CHANGE IN ENERGY of an object

• Objects maintaining the SAME energy start to finish

• Force applied PARALLEL to the motion of an object

Tags

NGSS.HS-PS2-1

What is the Force equation?
W= 

• F * d

• m * a
• d / V
• F / d

Tags

NGSS.HS-PS2-1

How many joules of work are done on a cart when a force of 50 N pushes it 100 meters away?

• 7000 J
• 5000 J
• 5500 J
• 6600 J

Tags

NGSS.HS-PS3-1

A force of 3.0 N is used to push a 20 kg object a distance of 1500 m. What is the work done?

• 4500 J

• 225 J

• 90000 J

• 500 J

Tags

NGSS.HS-PS3-2

An object starts on the ground at rest. It is then lifted and held above the ground giving it 300 J of GPE. What was the work done on the object?

• 300 J

• 50 J

• 0 J

• Not enough information.

An object moving on the ground at a certain speed has 500 J of KE. It then experiences a force causing it to stop. How much work was done on the object?

• 500 J

• 1000 J

• 250 J

• • 0 J

A car has 600 J of KE as it coasts along a level road at a constant speed. How much work is being done to the car?

• 600 J

• • 300 J

• 0 J

• Not enough information

Which of the following scenarios is an example of work?

• A cyclist riding a bike at a constant speed.

• Holding a grocery bag in the store.

• Pushing a heavy box in order to move it across the room.

• A dog taking a nap.

A powerlifter lifts a 300 kg barbell from the ground over their head, then sets it back down on the ground. How much work was done on the barbell overall.

• 0 J

• 3000 J

• • 30 J

• Not enough information.

Calculate the work done by a 47 N force pushing a pencil 0.26 m.

• 12.2 J

• 13.5 J

• 12.8 J

• 11.2 J