Question

of the following ways, which one is the best way to increase the power output?
A. Increase the amount of work done in a given time or do a given amount of work in less time.
B. Increase the amount of work done in a given time or do a given amount of work in more time.
C. Decrease the amount of work done in a given time and do a given amount of work in less time.
D.Decrease the amount of work done in a given time and do a given amount of work in more time.
E. None of these options.
I choose a. Is that correct

Answer 1

Yes, A
Power = work / time
to increase power increase work, decrease time

Answer 2

Can you help me with this question.
When going up stairs, by which method would you do more work?
A. Running
B. Walking
C. Crawling
D. All of the above options
E. There is not enough information to compare these situations

Answer 3

the work done is m g h, the same for all of them
If you go faster your power goes up but your time goes down, same old m g h

Answer 4

So it's d

Answer 5

I guess, I does not give you explicitly the option of "They are all the same".

Answer 6

When going up the stairs, by which method would you expend more power.
A. Running
B. Walking
C. Crawling
D. All of the above options produce the same power output.
E. There is not enough information to compare these situations

Answer 7

same energy
power = energy / time
shortest time wins

Answer 8

ah come on, you knew that !

Answer 9

So all of them have the same power output.

Answer 10

NO !!!!
same ENERGY
Power = energy/time
short time -----> big power
(mow lawn faster with more horsepower :)

Answer 11

Would that be a.

Answer 12

Work done = increase in energy = m g h
same for all
power = work done/ time
so bigger for shorter time
running expends more power, but work done getting the body up 12 feet is the same.

Answer 13

Yes, A

Answer 14

That is doing the same work in less time
which means more power

Answer 15

So I guess walking and crawling are out of the question

Answer 16

correct more time ===> less power needed

Answer 17

You can do a job with less power but it will take longer :)

Answer 18

A 1500 kg truck traveling at 80 km/h collides with another car of mass 1000 kg traveling at 30 km/h in the opposite direction. The two cars stick together after the collision. The speed immediately after the collision is

A. 36 km/h
B. 60 km/h
C. 180 km/h
D. 300 km/h
E. The correct answer is not listed above.

Answer 19

So how do I get this answer.

Answer 20

I showed you later