A ski jumper starts from rest from point A at the top of a hill that is a height h1above point B at
the bottom of the hill. The skier and skis have a combined mass of 80 kg. The skier slides down
the hill and then up a ramp and is launched into the air at point that is a height of 10 m above
the ground. The skier reaches point traveling at 42
(a) Calculate the height hi.
Please respond on separate paper, following directions from your teacher.
(b) Calculate the speed of the skier as the skier reaches point B.
(c) is the work done by the gravitational force on the skier as the skier slides from point A to
point B positive or negative?
Why?

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

Dust and gases contract.