When served at 200 km/h (124 mph), what is the equivalent weight exerted on the tennis ball?
it is one of:
a box of mineral water (15 kg)
Andy Murray and Novak Djokovic (162 kg)
Four bags of cement (200 kg)
Tiger (320 kg)
f=ma
m = 0.057kg
a = 55.6 ms
To determine the equivalent weight exerted on the tennis ball when served at 200 km/h (124 mph), we need to consider the concept of aerodynamic lift and Magnus effect. The Magnus effect is a phenomenon in which a spinning object experiences a crosswise force due to differences in velocities on different sides of the object.
When a tennis ball is hit or served, it spins and creates backspin or topspin. This spinning motion, combined with the aerodynamics of the ball, creates lift or downward force on the ball, depending on the direction of the spin. The Magnus effect causes the tennis ball to deviate from its normal trajectory, making it more challenging for the opponent to return.
To calculate the actual weight of the tennis ball as it is served, we need to consider the gravitational force acting on it and the additional lift force generated by the spin.
However, without specific information about the spin rate, ball parameters, or other factors, it is not possible to accurately determine the exact equivalent weight exerted on the tennis ball. These calculations require sophisticated equipment and specialized knowledge to measure and analyze ball characteristics during the serve.
Therefore, in the absence of specific data, we cannot provide a precise value for the equivalent weight exerted on the tennis ball during a serve at 200 km/h (124 mph).