What should a free-body diagram look like for a skydiver that is still speeding up as he falls? there is an arrow up for air resistance and an arrow down for gravity. the arrows are the same length. there is an arrow up for air resistance and an arrow down for gravity. the arrow up is longer than the arrow down. there is an arrow up for air resistance and an arrow down for gravity. the arrow up is shorter than the arrow down. there is only an arrow down for gravity. ~

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)