a) How much work does gravity do on a 0.180-kg ball fallingfrom a height of 23.0
ID: 1671505 • Letter: A
Question
a) How much work does gravity do on a 0.180-kg ball fallingfrom a height of 23.0m?___J b) A student throws a 0.170-kg ball straight upwards to aheight of 4.70 m. How much work did the they do? ____J c) What is the kinetic energy in joules of a 1060-kgautomobile traveling at 94 km/h?____J How much work would have to be done to bringa 1060-kg automobile travling at 94 km/h to a stop. d) A 59kg student traveling in a car wih a constant velocityhas a kinetic energy of 1.7 x 10^4J. What is the speedometerreading of the car in km/h? _______km/h a) How much work does gravity do on a 0.180-kg ball fallingfrom a height of 23.0m?___J b) A student throws a 0.170-kg ball straight upwards to aheight of 4.70 m. How much work did the they do? ____J c) What is the kinetic energy in joules of a 1060-kgautomobile traveling at 94 km/h?____J How much work would have to be done to bringa 1060-kg automobile travling at 94 km/h to a stop. d) A 59kg student traveling in a car wih a constant velocityhas a kinetic energy of 1.7 x 10^4J. What is the speedometerreading of the car in km/h? _______km/hExplanation / Answer
(a). mass m = 0.18 kg
Height h = 23 m
Work due to gravity W = mgh = 40.572 J
(b). mass m = 0.17 kg
Height h = 4.7 m
Work W ‘ = mgh
= 7.8302 J
(c). Mass m = 1060 kg
Speed v = 94 km / h = 26.1111 m / s
Kinetic energy K = ( 1/ 2) mv ^ 2= 361348.76 J
(d). Kinetic energy K = 1.7* 10 ^ 4 J
Mass m = 59 kg
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