6. a roller coaster is at the top of a 72 m hill and weighs 966 n. the coaster (at this moment) has ____…
6. a roller coaster is at the top of a 72 m hill and weighs 966 n. the coaster (at this moment) has ____ energy. calculate it.
Answer
Explanation:
Step1: Identify the type of energy
The roller - coaster at the top of the hill has potential energy.
Step2: Recall the formula for gravitational potential energy
The formula for gravitational potential energy is $U = mgh$. We are given the weight $F = mg=966\ N$ and height $h = 72\ m$.
Step3: Calculate the potential energy
Since $U = mgh$ and $mg = 966\ N$, then $U=(mg)h$. Substitute $mg = 966\ N$ and $h = 72\ m$ into the formula: $U=966\times72$. $U = 69552\ J$
Answer:
$69552\ J$