If a 5.0 kg mass is raised 2.0 m vertically, how much work is done? a. 5.0 J b. 9.8 J c. 98 J d. 0.0 J

Explanation:vertically it means distance =0. so we have work= weight x distance, it means W= 5 kg x 0 m= 0 J.

explanation:

specific heat is the amount of heat required to raise the temperature of a unit mass of a substance.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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