A pronghorn antelope has been observed to run with a tope speed of 97km/h. Suppose an antelope runs 1.5km with an average speed of 85km/h, and then runs 0.80km with an average speed of 67km/h. A) How long will it take the antelope to run the entire 2.3km? B) What is the antelope's average speed during this time?

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.)