Answer:
J. 35 m/s
Explanation:
The apparent velocity represents how an object is perceived to be traveling at in relation to another. From the perspective of the observer on the sidewalk, the motion of the ball is the combination of its motion relative to the bus and the motion of the bus itself. Therefore, we must add the velocities of the bus and the tennis ball to solve for the apparent velocity.
Solving:
[tex]\text{Apparent velocity} = \text{Velocity of bus} + \text{Velocity of ball }\\\\\text{Apparent velocity} = 20 \,\text{m/s} + 15 \,\text{m/s} = \boxed{35 \,\text{m/s} }[/tex]
Therefore, option J is correct.
