A student claims that hitting a tennis ball across the court is an example of balanced forces. Is he correct? (1 point)
A. Yes, because the force in the direction of the ball's motion is greater.
B. Yes, because equal forces act on the ball from all sides.
C. No, because the force in the direction of the ball's motion is greater.
D. No, because equal forces act on the ball from all sides.
C. No, because the force in the direction of the ball's motion is greater.
C. No, because the force in the direction of the ball's motion is greater.
To determine if hitting a tennis ball across the court is an example of balanced forces, we need to understand the concept of balanced forces. Balanced forces occur when two forces acting on an object are equal in magnitude and opposite in direction. This means that the overall effect of balanced forces is that they cancel each other out, resulting in no change in the object's motion.
In the case of hitting a tennis ball across the court, there are a few forces at play. Firstly, we have the force exerted by the player hitting the ball, which is directed towards the opposite side of the court. Secondly, we have the force of friction acting on the ball from the friction between the ball and the court's surface.
Considering these forces, we can eliminate options A and C. Option A states that hitting a tennis ball involves balanced forces because the force in the direction of the ball's motion is greater. However, this contradicts the definition of balanced forces, as balanced forces should be equal in magnitude and opposite in direction. Similarly, option C states that it is not an example of balanced forces because the force in the direction of the ball's motion is greater, which is also incorrect.
Now let's evaluate options B and D. Option B claims that hitting a tennis ball involves balanced forces because equal forces act on the ball from all sides. This does not align with the forces at play when hitting a tennis ball. The force exerted by the player hitting the ball is much greater than the force of friction, which is negligible when compared to the player's force.
Therefore, the correct answer is option D. Hitting a tennis ball across the court is not an example of balanced forces because equal forces do not act on the ball from all sides. The force exerted by the player hitting the ball is greater than the force of friction from the court's surface.