Question

What is the velocity of a 40kg kid running with 2000J of

kinetic energy?
a. Write the formula:
b. Plug in the numbers:
c. Solve:"

Answer 1

hey! hope this helps

Step-by-step explanation:

1. You can use the kinetic energy formula:

Kinetic Energy (KE) = (1/2)(mass)(velocity^2) ie. (1/2)(m)(v^2)

2. We know, Mass (m) = 40 kg and Kinetic Energy (KE) = 2000 J

3. Solving

KE = (1/2)(m)(v^2) [formula]

(2)(KE) = (m)(v^2)

v^2 = (2)(KE) / m

v = √((2)(KE) / m)

Now, plug in the values:

v = √((2 x 2000) / 40)

v = √(4000 / 40)

v = √(100 m^2/s^2)

so! velocity, v = 10 m/s