two people are in a rowboat on a river. the current of the river water carries them at a speed of five meters per second even when they are not rowing. what will happen to the boats motion of no other forces act on the boat?
A. the boats speed will increase
B. the boats speed will decrease
C. the boats speed will stay the same
D. the boat will change direction
C. the boats speed will stay the same
If no other forces act on the boat, the boat's speed will stay the same. Therefore, the answer is C. the boat's speed will stay the same.
In this scenario, two people are in a rowboat on a river where the current of the river water carries them at a speed of five meters per second, even when they are not rowing. To determine what will happen to the boat's motion if no other forces act on it, we need to consider the effect of the current on the boat.
The boat's motion is influenced by the combination of the rowing force applied by the people in the boat and the current of the river.
If no other forces act on the boat, it means that the people in the boat stop rowing.
Since the current of the river water carries the boat at a constant speed of five meters per second, and there are no opposing forces, the boat's speed will stay the same. This means that option C, "the boat's speed will stay the same," is the correct answer.