1. Select the option which will cause a worker to do the maximum amount of work

Question

A)using a lever to lift 100 newtons up 4 meters on to a shelf (This one?)
B) using her hands to lift 200 newtons up 1 meter on to a table
C) using a ramp to lift a 200 newton box up 1 meter into a truck
D) using a pulley to lift a 100 newton box up 3 meters onto a platform

2. Yours friends are in a debate over who does the most work. In which situation is the most work being done.

A)Jesse hauls 9 kg bags of mulch 200m with an average force of 90n
B) Stella mops the restaurant with an average force of 60N for 250m
C)Peyton pushes his lawnmower with an average force of 75 N for 500 M the lawnmower weights 10 kg. (This one?)
D) Addie stocks 10 kg boxes of cans on the shelves of the grocery store with an average force of 30 N for a total of 1km

3. A running back holds a 0.25 kg football and runs 100 m down the football field. In addition to scoring six points for his team, he also ___ work on the football.

A) no
B) 25 J of
C) 100 J of
D) 250 J of

4. Lulu gets a flat tire on her way to school. She gets out and attempts to push the car. For 60 minutes, she pushes but the car never moves. How much work did Lulu perform as she unsuccessfully tried to move the car.
A) She did 60 minutes of hard work
B) No work was done since the car never moved
C) We would have to know how much Lulu weighed in order to calculate the force she exerted
D) She performed a lot of work but was simply not strong enough to move the car herself. (This one?)

5. A 3.0 kg cart rolls down a hill. Assume that the height of the cart changes from a maximum of 4.0 meters at the top of the hill to 0.0 meters at the bottom. The speed of the cart changes from 0.0 m/s to 3.0 m/s. How much kinetic energy does the cart have when it is half-way down the hill

A)6.0J
B) 12.0J (This One?
C)58.8 J
D) 117.6J

Answer 1

1. Select the option which will cause a worker to do the maximum amount of work
A)using a lever to lift 100 newtons up 4 meters on to a shelf (This one?CORRECT)
B) using her hands to lift 200 newtons up 1 meter on to a table
C) using a ramp to lift a 200 newton box up 1 meter into a truck
D) using a pulley to lift a 100 newton box up 3 meters onto a platform

2. Yours friends are in a debate over who does the most work. In which situation is the most work being done.

A)Jesse hauls 9 kg bags of mulch 200m with an average force of 90n
B) Stella mops the restaurant with an average force of 60N for 250m
C)Peyton pushes his lawnmower with an average force of 75 N for 500 M the lawnmower weights 10 kg. (This one?CORRECT)
D) Addie stocks 10 kg boxes of cans on the shelves of the grocery store with an average force of 30 N for a total of 1km

3. A running back holds a 0.25 kg football and runs 100 m down the football field. In addition to scoring six points for his team, he also ___ work on the football.

A) no
B) 25 J of...WHAT IS .25*100?
C) 100 J of
D) 250 J of

4. Lulu gets a flat tire on her way to school. She gets out and attempts to push the car. For 60 minutes, she pushes but the car never moves. How much work did Lulu perform as she unsuccessfully tried to move the car.
A) She did 60 minutes of hard work
B) No work was done since the car never moved
C) We would have to know how much Lulu weighed in order to calculate the force she exerted
D) She performed a lot of work but was simply not strong enough to move the car herself. (This one? THE BEST ANSWER, AS THE SWEAT ON HER BROW PROBABLY ATTESTS TO. VERY POOR QUESTION)

5. A 3.0 kg cart rolls down a hill. Assume that the height of the cart changes from a maximum of 4.0 meters at the top of the hill to 0.0 meters at the bottom. The speed of the cart changes from 0.0 m/s to 3.0 m/s. How much kinetic energy does the cart have when it is half-way down the hill

A)6.0J
B) 12.0J (This One? CORRECT
C)58.8 J
D) 117.6J