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Kinetic energy
KE = ½mv² = p²/2m
Where: KE = kinetic energy (J), m = mass (kg), v = final velocity / speed (m/s)
Solved example
Given: m = 7, v = 5
Find: KE_ (kinetic energy (J))
- Formula: KE = m·v²/2
- Substitute the values: KE = 5²·7/2
- Result: KE = 87.5 J
Answer: KE_ = 87.5 J
Calculator
How to calculate Kinetic energy
- Write down the formula: KE = ½mv² = p²/2m.
- Note the known values (m, v).
- Substitute them and simplify to find KE_.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Kinetic energy?
The formula is KE = ½mv² = p²/2m, where KE = kinetic energy (J), m = mass (kg), v = final velocity / speed (m/s).
What is Kinetic energy when m = 7, v = 5?
KE_ = 87.5 J. Substitute the values into KE = ½mv² = p²/2m and simplify.