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physics007jazer
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Homework Statement
Brian whose mass is approximately 70 kg, is in an elevator accelerating upwards at 2m/2^2. Determine the normal force acting on his body. What weight would the scale register when Brian is going up?
Melanie is flying east in her new private jet at a constant altitude. The lift force on the plane is 100,000 N. The inital velocity of the plane is 100m/s[E], when it begins to accelerate at a constant rate. If the air resistance on the plane is 40,000 N and the thrust is 52,000 N, find the time it takes her plane to reach a velocity of 115m/2[E[?
Homework Equations
fnet=m*a
fg=m*g
The Attempt at a Solution
For the first questions I simply calculated the normal force, which was 750 N. Then I calculate the force of gravity, for which I got 686. Then I subtracted the force of gravity from the normal force (750 N -686 N= 64N, which is 64kg?) Am I going in the right direction?
I do not get the second question at all