a ball of mass 200 g rolls along the ground at a speed of 5.2 m/s. calculate the kinetic energy of the ball. give your answer to two significant figures.
A ball of mass 200 g rolls along the ground at a speed of 5.2 m/s. calculate the kinetic energy of the ball. give your answer to two significant figures.
Answer: To calculate the kinetic energy of the ball, you can use the formula:
Kinetic Energy (KE) = 1/2 * mass * velocity^2
Given:
Mass of the ball (m) = 200 g = 0.2 kg (since 1 kg = 1000 g)
Velocity of the ball (v) = 5.2 m/s
Substituting the values into the formula:
KE = 1/2 * 0.2 kg * (5.2 m/s)^2
KE = 1/2 * 0.2 kg * 27.04 m^2/s^2
KE = 2.704 J
Rounding to two significant figures, the kinetic energy of the ball is approximately 2.7 J (joules).