Express the acceleration as a multiple of the gravitational acceleration, g (9.8 m/s^2)

a=15 m/s

divide by g,

ie 15g's = 15*9.8m/s

To express the acceleration as a multiple of the gravitational acceleration, you need to divide the given acceleration by the gravitational acceleration (g). In this case, the given acceleration is 15 m/s^2.

To find the multiple, you can use the formula:

Multiple of g = Given acceleration / Gravitational acceleration

So, to find the multiple of g, divide 15 m/s^2 by 9.8 m/s^2 (the value of g):

Multiple of g = 15 m/s^2 / 9.8 m/s^2

Simplifying this expression:

Multiple of g = 15/9.8

Calculating the numerical value:

Multiple of g ≈ 1.53

Therefore, the acceleration is approximately 1.53 times the gravitational acceleration (g).