A roller coaster starts from rest at a height of 50 m. What is its speed at the lowest point?
Practice Questions
1 question
Q1
A roller coaster starts from rest at a height of 50 m. What is its speed at the lowest point?
10 m/s
20 m/s
30 m/s
40 m/s
Using conservation of energy, potential energy at the top = kinetic energy at the bottom. mgh = 0.5mv^2. Solving gives v = sqrt(2gh) = sqrt(2*9.8*50) = 31.3 m/s.
Questions & Step-by-step Solutions
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Q
Q: A roller coaster starts from rest at a height of 50 m. What is its speed at the lowest point?
Solution: Using conservation of energy, potential energy at the top = kinetic energy at the bottom. mgh = 0.5mv^2. Solving gives v = sqrt(2gh) = sqrt(2*9.8*50) = 31.3 m/s.
