Asmall 20-kg canoe is floating downriver at a speed of 2 m/s. what is the canoe’s kinetic energy? 80 j 18 j 40 j 400 j

The answer is: 40 J.

To solve this problem you must apply the proccedure shown below:

1. You have the following formula that is used to calculate the kinetic energy:

Where m is the mass of the objetct and V is the speed.

2. Substitute values into the formula:

3. Therefore, the result is:

A Physics student on the river bank, watching the canoe float by, says that its kinetic energy is (1/2 m v²) = 40 Joules.

A Physics student in another canoe, floating alongside the first one, says that its kinetic energy is zero.

Both students are correct, each one for his own frame of reference.

force tends to be low and long diustance masses are high

it is b. absorbs thermal energy