Recent content by chemguy990

Homework Statement A 5400 kg helicopter accelerates upward at 2.17 m/s2. The acceleration due to gravity is 9.8 m/s2. What life force is exerted by the air on the propellers? Answer in N. Homework Equations Fnet=ma The Attempt at a Solution I am making the acceleration positive...

I know using the pythagorean theorem will get the resultant for xy plane vectors...not sure how to get the third plane calculations.

Homework Statement I am having a tough time finding the resultant vector of the the following three dimensional vector: d1x=2.33 cm, d1y= 3.84 cm, d1z= -1.2cm d2x=3.41 cm, d2y= -1.01 cm, d2z = -3.29 cm d3x= -1.04 cm, d3y= 1.93 cm, d3z = 0 cm Find the resultant vector magnitude...

Homework Statement hot air balloon traveling vertically upward at 2.2 m/s. at 25 m above ground, releases a package. Solve for t. Homework Equations d=v(initial)t + 0.5(a)t2 The Attempt at a Solution 25m = [0.0 m/s(t)] + ½(9.8m/s2)t2 25/4.9 = t2 t=2.26 seconds My question...

A ball of unknown mass is thrown straight up. *maximum height reached in 5.78 seconds *acceleration due to gravity 9.8 m/s2 Calculate initial velocity in m/s Would the initial velocity be 9.8 m/s2 x 5.78 s: 56.644 m/s? Thats all the information given.