Work
Work Problems
Power
Power Problems
Energy/Other
100
Work is the transfer of ___________ through motion.
What is energy?
100

Carlos pulls a sled up a snow-covered hill. He does 405 J of work on the sled. If Carlos walks 15 m up the hill, how large of a force must he exert?

27 N

100
Power is the amount of ___________ done in a certain amount of _______.
What is work;time?
100
The formula for Power?
What is P=W/t
100

You are pushing against a house. Are you doing work? Why or why not?

What is no because the house is not moving in the direction of the force?

200

The unit for work

What is Joules (J)?

200

You use 6N to move a table 5m. How much work did you do? *Make sure to include units!

What is 30J?

200
The unit for Power?
What is Watts?
200
A toy car was using 600J of work over 200s. What was the power of the car?
What is 3W?
200

When a kernel of corn is popped into popcorn, some of the potential energy is destroyed to due to an increase in heat.

What is wrong with this statement?

Energy cannot be created or destroyed according to the LOCE

300
What two things does work depend on?
What is force and distance?
300
While you are riding a bicycle 5 m down the road you do 500J of work. What force did you use? *Make sure to include units!
What is 10N?
300

The two things Power depends on

What is work and time?

300
A kite was flying in the sky for 5s with a power of 10W. What is the kite's work?
What is 50J?
300

Describe the energy transformation that occurs when you turn on a battery-powered fan.

3 types

What is chemical to electrical to kinetic (or mechanical)

400
How do you know when work is being done?
What is when a force is applied, and the object moves in the same direction as the applied force?
400
A football player, weighing 1500N, is traveling down the field doing 3000J of work. How far did he travel?
What is 2 m?
400
You are at the store picking out lightbulbs. There is a 100W bulb and a 50W bulb. Which one would you get to last longer? Why?
What is 100W bulb because it has more power, meaning it will work harder for a greater amount of time
400
A dog used 200J of work to create a power of 2W while running in the yard. How long did the dog run for?
What is 100s?
400

In a game of tug of war, Team A and Team B had equal forces. Which team did work? How do you know?

What is neither team did work because the rope did not move in either direction since the forces were equal?

500
You are at library. You pick books off the bottom shelf and bring them to waist level. You then carry the books to the check out counter. When is work being done on the books?
What is when you pick up the books from the bottom shelf?
500
A 8kg cat on Earth climbed up a tree 4m high. How much work was done by the cat? *Make sure to include units; round to the nearest hundredth!
What is 313.6J?
500
Two women are running a 5k. They both reach the finish line, but runner A finishes in 45min and runner B finishes in 1hr. Which one has more power? Why?
What is Runner A because she did the same amount of work as Runner B but in less time?
500
A soccer ball, weighing 10N,was kicked 20m in 50 sec. How much power does the ball have?
What is 4W?
500

A 100N person walked up a staircase that was 5m high in 10s.That same 100N person ran up a staircase that was 5m high in 5s. When did the person use more power? Why/Why not?

What is when they ran up the staircase bc they completed the same work quicker?

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