Question
A 2 kg object is moving at 4 m/s. What is its kinetic energy?
Answers
GPT-4o mini
The kinetic energy (KE) of an object can be calculated using the formula:
\[
KE = \frac{1}{2} m v^2
\]
where \( m \) is the mass of the object and \( v \) is its velocity.
For a 2 kg object moving at 4 m/s, the kinetic energy can be calculated as follows:
\[
KE = \frac{1}{2} \times 2 \, \text{kg} \times (4 \, \text{m/s})^2
\]
First, calculate \( (4 \, \text{m/s})^2 \):
\[
(4 \, \text{m/s})^2 = 16 \, \text{m}^2/\text{s}^2
\]
Now substitute that back into the kinetic energy formula:
\[
KE = \frac{1}{2} \times 2 \, \text{kg} \times 16 \, \text{m}^2/\text{s}^2
\]
\[
KE = 1 \, \text{kg} \times 16 \, \text{m}^2/\text{s}^2
\]
\[
KE = 16 \, \text{Joules}
\]
Therefore, the kinetic energy of the object is **16 Joules**.
\[
KE = \frac{1}{2} m v^2
\]
where \( m \) is the mass of the object and \( v \) is its velocity.
For a 2 kg object moving at 4 m/s, the kinetic energy can be calculated as follows:
\[
KE = \frac{1}{2} \times 2 \, \text{kg} \times (4 \, \text{m/s})^2
\]
First, calculate \( (4 \, \text{m/s})^2 \):
\[
(4 \, \text{m/s})^2 = 16 \, \text{m}^2/\text{s}^2
\]
Now substitute that back into the kinetic energy formula:
\[
KE = \frac{1}{2} \times 2 \, \text{kg} \times 16 \, \text{m}^2/\text{s}^2
\]
\[
KE = 1 \, \text{kg} \times 16 \, \text{m}^2/\text{s}^2
\]
\[
KE = 16 \, \text{Joules}
\]
Therefore, the kinetic energy of the object is **16 Joules**.