Shawn and his bike have a total mass of 45.5 kg. Shawn rides his bike 1.95 km in 10.0 min at a constant velocity. What is Shawn's kinetic energy? Assume that air resistance is negligible.
Question
Shawn and his bike have a total mass of 45.5 kg. Shawn rides his bike 1.95 km in 10.0 min at a constant velocity. What is Shawn's kinetic energy? Assume that air resistance is negligible.
Solution
To calculate Shawn's kinetic energy, we first need to know his velocity.
Step 1: Convert the distance from km to m and time from minutes to seconds Distance = 1.95 km = 1950 m Time = 10.0 min = 600 s
Step 2: Calculate velocity Velocity = Distance / Time = 1950 m / 600 s = 3.25 m/s
Step 3: Calculate kinetic energy The formula for kinetic energy is KE = 1/2 * m * v^2, where m is mass and v is velocity.
Mass = 45.5 kg Velocity = 3.25 m/s
So, KE = 1/2 * 45.5 kg * (3.25 m/s)^2 = 240.1 J
Therefore, Shawn's kinetic energy is 240.1 Joules.
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