Airplane traveling at 75m/s with a kinetic energy of 843700j?

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Answer 1 · 2018-05-01T21:06:56

#299.98 bb(kg) color(white)(8888)# 2 d.p.

Kinetic energy is given by:

#KE = 1/2mv^2#

Where:

#m="mass"# given in #kg#

#v="velocity"# given in #ms^-1#

#KE="kinetic energy"# given in Joules.

I am assuming you require the mass of the plane.

Plugging in known values:

#843700=1/2m(75)^2#

Multiplying by 2:

#1687400=m(75)^2#

Dividing by #(75)^2#:

#m=1687400/(75^2)=299.98 bb(kg)# 2 d.p.