Question
What is Kinetic Energy (KE) of 18 kg bike going 5 m/s?
(1 point)
Responses
2025 joules
225 joules
4050 joules
45 joules
(1 point)
Responses
2025 joules
225 joules
4050 joules
45 joules
Answers
GPT-4o mini
To calculate the kinetic energy (KE) of the bike, you can use the formula:
\[ KE = \frac{1}{2} mv^2 \]
where:
- \( m \) = mass (in kilograms)
- \( v \) = velocity (in meters per second)
For the bike:
- \( m = 18 \) kg
- \( v = 5 \) m/s
Now, substitute the values into the formula:
\[ KE = \frac{1}{2} \times 18 \, \text{kg} \times (5 \, \text{m/s})^2 \]
\[ KE = \frac{1}{2} \times 18 \times 25 \]
\[ KE = \frac{1}{2} \times 450 \]
\[ KE = 225 \, \text{joules} \]
Thus, the kinetic energy of the bike is **225 joules**.
\[ KE = \frac{1}{2} mv^2 \]
where:
- \( m \) = mass (in kilograms)
- \( v \) = velocity (in meters per second)
For the bike:
- \( m = 18 \) kg
- \( v = 5 \) m/s
Now, substitute the values into the formula:
\[ KE = \frac{1}{2} \times 18 \, \text{kg} \times (5 \, \text{m/s})^2 \]
\[ KE = \frac{1}{2} \times 18 \times 25 \]
\[ KE = \frac{1}{2} \times 450 \]
\[ KE = 225 \, \text{joules} \]
Thus, the kinetic energy of the bike is **225 joules**.