Physics Gurus come on in
Hi basilers, so i was wondering if anyone could help me with a couple of these physics questions
1)An airplane moves in straight level flight at constant velocity. What is the net force acting on it if the mass of the plane is 1000 kg and the frictional drag of the air is 1800 N?
2)A toy car which is given a quick push so that it rolls up an inclined ramp. After it is released, it rolls up, reaches its highest point and rolls back down again. Friction is so small it can be ignored. Use one of the following choices to indicate the net force acting on the car if the car is moving up the ramp after it is released.
a. Net increasing force down ramp
b. Net constant force up ramp
c. Net force zero
d. Net decreasing force down ramp
e. Net Increasing force up ramp
f. None of these are correct
g. Net decreasing force up ramp
h. Net constant force down ramp
3)Which of the following is true?
a. There is no connection between Newton's Laws and kinematics.
b. Force divided by acceleration gives the weight of an object.
c. None of these.
d. The product of mass and acceleration, ma, is a force.
e. Action-reaction forces act on the same body.
Thanks abunch guys
8 Comments • Newest first
[quote=ssscongruent]Only the horizontal component. Drag force is still involved in the y-direction.[/quote]
It's straight, level flight.
And that's not how drag works in simple physics.
Good thing I am done with physics.. seriously that class sounded easy but it was confusing and hard at the same time.. first semester I got a really LOW C and thank goodness.. second semester I pulled it up with a really low B! sigh of relief...
and everything i learned in physics is gone in my head.. not even 3months since i finished jr year -.-
My Analytical Mechanics professor says kinematics isn't physics; just math.
1) zero (cst velocity => a=0 => F=0)
2) h.Net constant force down ramp
3) d.
[quote=ssscongruent]1) 8200 N downward.[/quote]
Net force is 0.
Are you from the future and your trying to make us do your homework?
2 is h I think.
rg4yBxL5-sd@gB7=Br38/?