Comb Sci: Energy 1

​Watch this video (2 mins)

​Make sure to understand:

• ​What is energy?

• ​What is the unit of energy?

Multiple Choice

What is energy?

• moving energy

• stored energy

• renewable energy

• The ability to do work.

Multiple Choice

capacity to do work is called

• work

• joule

• energy

• none

​Watch this video (1 min)

​Make sure to understand:

• ​What is work done?

• ​What is the unit of work done?

• ​What is the formula for work done?

Multiple Choice

What is the formula for work?

• Force = work x distance
• Distance = force x work
• Work = force x distance
• Work = force x mass

Multiple Choice

units for work are

• newtons

• joules

• meters

• seconds

​Watch this video (1 min)

​Make sure to understand:

• ​How to calculate work done from the formula.

Multiple Choice

if you push a cart with a force of 60 N for 2 m... how much work have you done

• 120 J

• 30 J

• 120 N

• 30 N

Multiple Choice

If 40N of force is applied to Rollo Koster's 10 kg cart over a distance of 50 meters, how much work is done?

• 8000J

• 8000N

• 4000J

• 2000J

Multiple Choice

Ahmed is out with his friends. Misfortune occurs and Ahmed and his friends find themselves getting a workout. They apply a cumulative force of 1000 N to push the car 200 m out of the sand. Determine the work done on the car.

• 2 x 10⁵ J

• 2.70 x 10⁴ J

• 3.2 x 10^-4 J

• 3.54 x 10⁵ J

Multiple Choice

Two people push on a wall with 100 N. The wall doesn’t move. How much work is done?

• 100J

• 100N

• 0J

• 0N

​Watch this video (2 mins)

​Make sure to understand:

• ​How to calculate distance from the formula.

Multiple Choice

A kid uses 210 J to kick a ball and 60 N is exerted on the ball. How far did the ball travel? 

• 3.5 m

• 0.286 m 

• 12.600 m 

• 270  

​Watch this video (2 mins)

​Make sure to understand:

• ​How to calculate force from the formula.

Multiple Choice

Two people push on a car with 4000 J. The car moves by 5 m. What is the force produced from this action?

• 800 N

• 0.00125 N

• 20,000 N

• 3995 N