The total distance covered by the person is 12 times the height of each stair:
The work done by the person to climb the stairs is equal to the increase in his gravitational potential energy:
And therefore, the power generated by the person in 12 s is the work done divided by the time taken:
So, the correct answer is B.
15 you get 3 Multiply it by 5 and get 15
Is there any Examples/Answers or is it simply just explain it in a text box?
Answer:
The total net force is 17N in total.
Hope this helps :)
Answer:
FALSE
Explanation:
Velocity = speed with direction.
Think of speed and direction like rockets and missiles. Rockets are not smart. Missiles are smart. Rockets go in one direction. Missiles can track their targets, they have a specific destination, a specific direction.
Velocity is often used in physics, because its almost useless to know how fast an object is going if you don't know which direction it is going.
Think of it like this. If the Weather man told you a hurricane was traveling at 30 miles an hour, but didn't tell you which direction it was going, you would have no idea where to run, or if it was going to hit you at all. However, if he told you it was going 30 miles an hour to the North, and you were West of it, you would be fine, and wouldn't have to worry.
