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

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Answer 1 · 2018-03-23T22:33:57

#25000J or 25kJ#

#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#

Answer 2 · 2018-03-23T22:35:09

# K = 2.5 * 10^4J#

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#