Force, Work, And Power

Johnny wants to know how much time it will take him to 10 joules of work (moving around live sharks) with 34 watts. He thinks the answer is 0.29 seconds. Is he right?

• Yes

• No

Mark has this extremely bland question on his physics test:

How do you calculate force?

We can't help Mark, but we can check the only 4 things you need to calculate work or force or power:

• Kinetic Energy

• Time

• Acceleration

• Distance

• Mass

Julia is taking boxes roughly the size of a person from her car up a ramp into her house. Does a longer ramp require less force to climb?

• Yes always forever and for certain

• Kind of

• Depends where it's going

• No

W=__D

__=MA

P=W/__

Emmet needs to wreck a building with a wrecking ball. The ball accelerates at 26 m/s/s, arriving at its 30 meters away destination in 34 seconds, and has a mass of 3,000 kg.  

How much work is this ball doing?

• 2,340,000 Joules

• 44,225,463 newtons

• 44,325,473 newtons

• 44,235,464 newtons

Work is measured in...

Jack is calculating mechanical advantage. He puts in 100% of his force to his homework (45 Newtons) but for some reason only 15 Newtons come out. What is the MA?

• 3

• 1/3

• 3.1415926535...

• 346

If you can only work 42 Joules because you're simply EXHAUSTED and you only have 19 seconds to do all that work how much power are you going to use?

• 1.2

• 4

• 2.21

• 3.55