Review 83500 J

1. A 90.0 kg man climbs hand over hand up a rope to a height of 9.47 m. How

much potential energy does he have at the top?

2. A 50.0 kg shell was fired from a cannon at earth's surface to a maximum

height of 400. m.

a. What is the potential energy at maximum height?

b. It then fell to a height of 100. m. What was the loss of PE as it fell?

3. A person weighing 645 N climbs up a ladder to a height of 4.55 m.

a. What work does the person do?

b. What is the increase in gravitational potential energy?

c. Where does the energy come from to cause this increase in PE?

It is 5 hope this you out 

Answernewton's second law,says that when a contant force acts on a massive body, it causes it to accelerate

Let  be the velocity of the plane.let  be the velocity of the wind.let  be the resultant velocity.add the velocities to find the resultant velocity. in the attached picture, i have done the tail-to-tip method: draw one of the vectors, then add the end of the other vector to the tip of the first drawn vector.see diagram.the magnitude of  can be found via the pythagorean theorem as this is a right angle triangle.to find  , use inverse tangent: since  is in the direction "east of north", a quick convert to "north of east " reveals that 90 - 7.06 = 82.94 = 83.so our resultant is 529 m/s [83° n of e]the answer is a.