Question

A toy plane with a mass of 20 kg is flying at 10 m/s. What is its kinetic energy?

A. 1 000 J
B. 200 J
C. 2 000 J
D. Cannot be determined

Answer 1

1000J

Step-by-step explanation:

Given parameters:

Mass = 20kg

Speed = 10m/s

Unknown:

Kinetic energy = ?

Solution:

To solve this problem, we use the kinetic energy equation:

Kinetic energy =
`(1)/(2)` m v²

m is the mass

v is the speed

Now insert the parameters and solve;

K.E =
`(1)/(2)` x 20 x 10² = 1000J