Astunt man is attempting to ride his bike through the loop of a track. the
combined mass of the stunt man and his bike is 101 kg. (a) if the radius of
the loop is 10.1 m and he is traveling at 22.5 m/s, what is the normal force
from the track when he is at the top of the loop?
(b.) what is the minimum speed the stunt man can be traveling and still
make the loop?

Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

What was the purpose of the apollo program? to put a man in orbit to launch a spy satellite to launch a space station to put man on the moon