For an easy solution, use conservation of energy.
Vo = 42 m/s
Vf = final velocity
M ='mass
H ='rooftop height
MgH + (M/2)Vo^2 = (M/2)Vf^2
Cancel out the M and solve for Vf
Vf^2 = Vo^2 + 2 g H
Jo student undertakes a unique experiment with his calculator. He goes to the school roof that is 18.0 m above the ground. He throws the poor calculator upward with a velocity of 42 m/s. Assume that the calculator goes straight up and just misses the roof on its way to the ground.
Calculate the velocity with which the calculator will hit the ground.
1 answer
1 answer