If a fence were built across the fault in 2005 how far apart will the two sections of now broken fence be in 2030

The two sections will be 125cm apart in 2030.

Explanation:

The rate of movement in the San Andreas fault is said to be between 4 and 6 cm a year. I am going to use 5 cm a year.

The fence was built in 2005, so in 2005 the separation was of 0 cm.

2030 is 2030-2005 = 25 years from 2005, so the separation is of 25*5 = 125 cm.

The two sections will be 125cm apart in 2030.

no simpler subs form complex ones. synthesise = make

we need to know the time interval during which the force acts. impulse of force = momentum change