Question

1. a running camper (like a car) rolls down a hill. it has 37 j of kinetic energy and 84 j of total mechanical energy. how much potential energy does the car have? pe = me - ke

options:
1208 j
121 j
47 j
221 j
clear all

Explanation:

Step1: Identify the formula

The formula given is \( PE = ME - KE \), where \( ME \) is total mechanical energy and \( KE \) is kinetic energy.

Step2: Substitute the values

We know \( ME = 164 \, \text{J} \) and \( KE = 37 \, \text{J} \). Substituting into the formula: \( PE = 164 - 37 \).

Step3: Calculate the result

\( 164 - 37 = 127 \, \text{J} \)? Wait, no, wait—wait, maybe I misread. Wait, the options have 127? Wait, no, the options: let's check again. Wait, the problem says "total mechanical energy" is 164 J, kinetic energy is 37 J. So \( PE = ME - KE = 164 - 37 = 127 \)? But the options: one of them is 127? Wait, the options shown: 106, 127, 67, 201. So 164 - 37 is 127. So the correct answer is 127 J.

Answer:

127 J (corresponding to the option with 127 J)