Question

A cell phone weighing 80 grams is flying throgh the air at 15 m/s what is the kentic energy

Answer 1

Answer :

Explanation:
80g =0.08 kg
KE = 0.08kg(225 m²/s²)
KE = 18 J

Answer 2

Answer:

kinetic energy: $9$ Joules

Explanation:

$Kinetic-Energy = \frac{1}{2} m v^2$

Here the mass is 80 grams - which should be changed to kilograms

→ 1 kg ⇔ 1000 grams

→ 80 grams ⇔ 0.08 kg

Now using the formula:

$\frac{1}{2} mv^2$

$\frac{1}{2} * 0.08 * 15^2$

$9$ Joules

Remember the mass should be in kg and velocity in meter per second.