Which of the following is an example of simple harmonic motion

Option A where in a ball bounces on a sidewalk is a repeated motion in a fixed interval of time. A force always acts on the ball in the direction opposite to the displacement of the ball. Thus, it is a correct example of simple harmonic motion.

a precentage of 6th graders. the population is all 6th graders. let me know if i'm wrong, i hope this ! : )

step-by-step explanation:

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116