Question

Problem 5

Answer 1

Given information

Causes of the boat to move forward.

(a) The force the man exerts on the paddle.

(b) The force the paddle exerts on the water.

(c) The force the water exerts on the paddle.

(d) The motion of the water itself.

Step-by-step explanation

Step 1.

Both man and paddle move together so consider as one system.

                                                                         

W: weight of boat + man + paddle

N: normal reaction by water

: Force on water due to paddle

 : Force on boat bottom due to water

The weight and normal force balance and thus, there is no vertical motion.