Kaylin starts the stopwatch on her phone, as it falls off her desk. It stops at .42 seconds when it hits the floor. How tall is her desk?
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Ответ:
Given:
m(mass)=88kg
v(velocity)=10m/s
Now kinetic energy=1/2(mv^2)
Where m is the mass
v is the velocity
Substituting these values we get
Kinetic energy=1/2(88 X 10 x 10)
Kinetic energy = 4400 N