Question

A 35-kg boy is riding an 18-kg bicycle down a path. The bicycle is moving at 11 m/s.

Calculate the kinetic energy of the boy and the bicycle (rounding your answer to the nearest tenth).

Kinetic Energy _____________ KJ

Answer 1

The kinetic energy of the boy and the bicycle can be calculated using the formula KE = 1/2 * m * v^2, where KE is the kinetic energy, m is the mass, and v is the velocity. The kinetic energy of the boy is approximately 2147.2 J and the kinetic energy of the bicycle is approximately 1188 J. Therefore, the total kinetic energy of the boy and the bicycle is approximately 3335.2 J.

Step-by-step explanation:

To calculate the kinetic energy of the boy and the bicycle, we need to use the formula: KE = 1/2 * m * v^2, where KE is the kinetic energy, m is the mass, and v is the velocity.

For the boy, the mass is 35 kg and the velocity is 11 m/s, so his kinetic energy is: KE = 1/2 * 35 kg * (11 m/s)^2.

For the bicycle, the mass is 18 kg and the velocity is also 11 m/s, so its kinetic energy is: KE = 1/2 * 18 kg * (11 m/s)^2.

Calculating these values, we find that the kinetic energy of the boy is approximately 2147.2 J and the kinetic energy of the bicycle is approximately 1188 J. Therefore, the total kinetic energy of the boy and the bicycle is approximately 3335.2 J.