Internal energy of the system changes by ΔE = 178 J.
Heat given to the system = Q = +658 J.
According to the first law of thermodynamics,
ΔE = Q + W
178 = 658 + W
∴ W = 178-658 = -480 J
Minus sign indicates that work is done by the system.
From the graph given, the y-axis represents the potential energy while the x axis is represents the displacement. To calculate the potential difference, I think the values from point two to point one should be only subtracted.
Potential difference = 200 - 100 = 100 V/m
easy, The fuel is ignited
1. Air resistance (therefore, the air density, shape (aerodynamic or not), and surface area affected
2. The gravitational acceleration constant (g = 9.8 m/s^2 on Earth)
It would <span>keep rolling without slowing down if no friction acted upon it.
</span>