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

A small 20-kg canoe is floating downriver at a speed of 2 m/s. 40 J is the canoe’s kinetic energy.

Option A

Explanation:

The given canoe has the mass and is being given to move at a speed. Therefore the kinetic energy of the canoe can be calculated using the following method,

Given that mass of the canoe = 20 kg and its speed =1 m/s

As we know that the Kinetic energy has the formula,

Therefore, substituting the value into the equation, we get,  

= 40 J

A. 40 J

Explanation:

Kinetic energy is:

KE = ½ mv²

where m is mass and v is velocity.

Given m = 20 kg and v = 2 m/s:

KE = ½ (20 kg) (2 m/s)²

KE = 40 J

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.