A 900 kg bull is running with a speed of 15 m/s when he runs into the caboose of a rodeo clown. It takes 0.34 seconds for the bull to completely stop. If the rodeo clown has a mass of 95 kg, what force does the bull apply
to him?
a.
Find the momentum of the bull before the collision.
b.
Find the momentum of the bull after the collision.
c
Find the change in momentum of the bull.
d
What impulse does the rodeo clown experience? Include the direction of the impulse.
e.
What impulse does the bull experience? Include the direction of the impulse.
f.
Find the force the bull applied to the rodeo clown.
g. Use complete sentences to explain how the change in momentum of the clown is related to the impulse the
bull applies to the clown.

Write the equation for momentum, first using symbols for the variables, then using words for the variables.

An internally reversible refrigerator has a modified coefficient of performance accounting for realistic heat transfer processes of where qin is the refrigerator cooling rate, qout is the heat rejection rate, and is the power input. show that copm can be expressed in terms of the reservoir temperatures tc and th, the cold and hot thermal resistances rt,c and rt,h, and qin, as where rtot rt,c rt,h. also, show that the power input may be expressed as 1.39 a household refrigerator operates with cold- and hot-temperature reservoirs of tc 5 c and th 25 c, respectively. when new, the cold and hot side resistances are rc,n 0.05 k/w and rh,n 0.04 k/w, respectively. over time, dust accumulates on the refrigerator’s condenser coil, which is located behind the refrigerator, increasing the hot side resistance to rh,d 0.1 k/w. it is desired to have a refrigerator cooling rate of qin 750 w. using the results of problem 1.38, determine the modified coefficient of performance and the required power input w under (a) clean and (b) dusty coil conditions. internally reversible refrigerator qout qin w high-temperature reservoir low-temperature reservoir th th,i tc,i tc high-temperature side resistance low-temperature side resistance w qin th tc qinrtot tc qinrtot copm tc qinrtot th tc

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?