Calculating the Speed of a Baseball
What is the speed of a 0.149 kg baseball if its kinetic energy is 104J?
The speed of a 0.149 kg baseball with a kinetic energy of 104J is approximately 21.77 m/s.
Explanation:
The kinetic energy of a baseball can be calculated using the formula KE = 1/2 * mass * velocity^2. We are given the mass of the baseball (0.149 kg) and the kinetic energy (104 J). By rearranging the formula, we can solve for velocity: velocity = sqrt(2 * KE / mass).
Plugging in the values, we get velocity = sqrt(2 * 104 J / 0.149 kg) = 21.77 m/s.
Therefore, the speed of the baseball is approximately 21.77 m/s.
What is the formula for calculating the kinetic energy of an object? How can we use this formula to determine the speed of the baseball in this scenario? The formula for calculating the kinetic energy of an object is KE = 1/2 * mass * velocity^2. In this scenario, we can use this formula along with the given mass and kinetic energy values to find the velocity of the baseball. By rearranging the formula and plugging in the values, we can solve for the speed of the baseball.