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Why are trigonometry functions periodic?
Because any angle increased by k*2pi radians (= k*360 degrees) where k is an integer, is, effectively, the same angle. This implies that f(x + 2kpi) = f(x) for any angle x and any trig function f. This gives f a maximum period of 2pi radians.
Can torque have a negative value in physics?
Yes, torque can have a negative value in physics. Torque is vector energy. Torque is the vector analogue of Work involving force (F) and displacement (D) vectors and the angle (FD). For example Work W = -F.D= -|FD|cos(FD) and Toque T = FxD =|FD|sin(FD). Torque can be negative dependent on the sine(FD). Work and torque is an example of the quaternion nature of physics; for example Quaternion energy E = FD = -F.D + FxD, the real energy is called work F.D and the vector energy is called torque, FxD.
87 Ford F-150 in-line 6cyl red-line?
I believe the maximum horsepower rating was 145 at 4200 RPM ,but I don't know what the engine redline is ( 265 Ft/Lb torque at 2000 RPM )
A quantity that depends on force distance and time is called?
That's power.P = FS (theta)/T; where F is force, S is distance, T is time, and theta is the angle between F and S.
How do you find angles from fractions?
Assuming the question is in the context of pie charts, the angle which corresponds to a fraction, f, of the total is makes and angle at the centre of 2*pi*f radians (= 360*f degrees).
