Question

What is the kinetic energy of a 2,000-kg car moving at 20m/s

Answer 1

Answer : 400000J OR 4×10^4J

Kinetic energy= 1/2mv^2

Here, m=2000kg; V=20m/s

1/2×2000×20×20=400,000J

Answer 2

400k

Step-by-step explanation:

Formula for KE =
`(1)/(2) mv^(2)`

Plug in:

KE =
`(1)/(2) mv^(2)`

KE =
`(1)/(2)` × 2000 × 20^2

Solve:

1000 × 400 = 400,000 or 400k

Hope this helped.