A car of mass 1100 kg drives with a velocity such that it has a kinetic energy of 400 kJ. Find its speed. If the car is raised with a crane, how high should it be lifted in the standard gravitational field to have a potential energy that equals the kinetic energy?
E = mv^2/2
hence we can find velocity v = sqrt(2E/m) = sqrt(2*400*10^3 J/1100) = 27 m/s
When potential energy equals kinetic
The height is
h = mv^2/(2m*g) = 400kJ/(1100kg*9.8 m/s^2) = 37.1 m
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The experience was great for sure. The work was done by the deadline, so thank you! Only one thing though. If someone says that their work is due at 12pm and you have 3days, the ideal thing to do is to get it done earlier so that person can have enough time to look at it if they can.