Kidd

An airplane is flying with a speed of 250km/h at a height of 3610m above the ground. A parachutist whose mass is 75.2kg, jumps out of the airplane, opens the parachute and then lands on the ground with a speed of 3.75m/s . How much energy was dissipated o...

So I assumed the horizontal speed of 250km/h of the airplane is not needed to obtain the solution? Using Conservation of Energy theorem: Epgi+Eki = Epgf+Ekf+E mghi+(1/2)mvi^2 = mghf+(1/2)mvf^2+E (75.2kg)(9.80m/s^2)(3610m)+(1/2)(75.2kg)(0m/s)^2 = (75.2kg)(...

Thank you. But I am still confused about why exactly the airplane's speed affects the parachutist's initial kinetic energy. The way I break it down is that the airplane's speed is horizontal and the parachutist's initial kinetic energy deals with vertical...

What is your question in relation to those equations?

Jack:John = 5:6 Jack John 5 6 x 186cm x = 186*5/6 = 155cm Jack's height is 155cm.

(45min)(1hr/60min) = 0.75hr 1500/0.75hr = x/2hr x = 4000 newspapers

Four friends went to the movies. ​​Each person bought a movie ticket, ​and the total the four friends spent on the tickets was $52. ​ ​Which ​equation can be used to find the cost of each ticket?