A pendulum formed by a 1m rope and a mass of 500g, separates 5° from the equilibrium point. Calculate a) the period and the amplitude in cm, b) the tension of the rope and the restoring force: c) the mechanical energy and the maximum speed.

answer; i believe that the correct answer is (d) a very small amount of mass

because it says use -2,0,and 2 for x, we can plug those numbers into the equation. y/4=3/4(-2)+2   y/4= -1 1/2 +2 now to get x by itself, we can multiply each side by 4. y=-6+8 which equals y=2 when x=-2. now you can do the same thing with 0 and 2 as x. you get y=8 when x=0 and y=14 when x=2.

x   |   y

-2 |   2

0   |   8

2   |   14

no. dot product   =0 when vecs at right angles