A pendulum swings through a total of 28°. If the displacement is equal on each side of the equilibrium position, what is the amplitude of this vibration? (Disregard frictional forces acting on the pendulum.)

14°

Explanation:

From the question; we are being told that the pendulum swings through a total displacement of 28°,we are to assume  that  the displacement is equal on each side of the equilibrium position.

So; the amplitude of the vibration literally reflects the maximum displacement generated by a moving body, its wave is usually measured from the equilibrium position which equal to one-half of the length of the vibrating path. Having said that; the amplitude of this vibration is one-half displacement of the pendulum

i.e

A = of 28°

A = 14°

heats surface water up

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min