A rower of mass sits in a boat of mass that is initially at rest with respect to…
PHYSICS · Subjective · AP · Physics 1: Algebra-based · Force and Translational Dynamics · Force and Translational Dynamics
Problem
A rower of mass 70kg sits in a boat of mass 130kg that is initially at rest with respect to still water. He pulls the oars so that the water experiences an average backward force of 80N for 3.0s. Neglect all other forces such as water resistance.
(a) What is the magnitude of the force exerted by the water on the boat during the stroke?
(b) Calculate the acceleration of the boat while the force acts.
(c) Find the speed of the boat at the end of the 3.0s stroke.
(d) Explain why the boat moves forward even though the rower is applying a force in the backward direction on the water.