What is the kinetic energy of a 2,000-kilogram boat moving at 5 m/sec?

2 Answers
Mar 23, 2018

25000J or 25kJ

Explanation:

KE = 1/2mv^2

kinetic energy = 1/2 * mass * velocity^2

where mass is in kilograms kg

and velocity is in metres per second m//s.

here, m = 2000

v = 5

v^2 = 25

1/2mv^2 = 1/2 * 2000 * 25

= 50000/2

= 25000

KE = 25000J or 25kJ

Mar 23, 2018

K = 2.5 * 10^4J

Explanation:

m = 2000 kg
v = 5 m/sec
K (kinetic Energy) = ?

From the formula:
K = 1/2 * m * v^2
K = 1/2 * 2000 * (5)^2
K = 1000 * 25
K = 25000 kg m^2/(sec)^2 = 25000 J = 2.5 * 10^4 J