To calculate the gravitational potential energy (GPE) of the rollercoaster cart, we can use the formula:
\[ \text{GPE} = m \cdot g \cdot h \]
where:
- \( m \) is the mass of the cart (in kg),
- \( g \) is the acceleration due to gravity (approximately \( 9.81 , \text{m/s}^2 \)),
- \( h \) is the height above a reference point (in meters).
From your question, we know the mass of the cart is \( m = 125 , \text{kg} \). However, you didn't specify the height \( h \). If you provide the height, I can calculate the GPE for you.
Regarding the "m/s" you're asking about, if you are referring to the speed of the cart, that depends on various factors such as the height it starts from and the physics of the rollercoaster. If you can clarify how you want to relate GPE to speed or if there’s a specific height to consider, I can assist with that as well!