Answer:
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
A small 20-kg canoe is floating downriver at a speed of 2 m/s. 40 J is the canoe’s kinetic energy.
Answer: 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,
[tex]\text {Kinetic energy}=\frac{1}{2} \boldsymbol{m} \boldsymbol{v}^{2}[/tex]
Therefore, substituting the value into the equation, we get,
[tex]K . E .=\frac{1}{2} \times 20 \times 2^{2}[/tex] = 40 J
