Question

7. Two campers dock a canoe. One camper steps onto the dock. This camper has a mass of 80 kg and moves forward at 4.0 m/s. With what speed and direction do the canoe and the other camper move if their combined mass is 110 kg?

Answer 1

Step-by-step explanation:

Ths question is about conservation of momentum. The momentum of the camper on the dock is the same as the momentum of the other camper and the canoe.

`m_1v_1=m_2 v_2`

`80 kg . 4.0 m/s = 110 kg . v_2`

`v_2 = (320 kgm/s)/(110 kg)`

`v_2 = 2.9 m/s`

The canoe will move backward (away from the dock) at 2.9 m/s