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

User AndraeRay
by
8.2k points

2 Answers

2 votes
Answer :

Explanation:
80g =0.08 kg
KE = 0.08kg(225 m²/s²)
KE = 18 J
User Amit Thakkar
by
9.0k points
4 votes

Answer:

kinetic energy:
9 Joules

Step-by-step explanation:


Kinetic-Energy = (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:


(1)/(2) mv^2


(1)/(2) * 0.08 * 15^2


9 Joules

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

User Richard Fung
by
8.2k points

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