Question

Question #921bb

Answer 1

19.6133 m

Explanation:

This is a free fall motion

Information given:
`v_0=o`
`a=-9.80665ms^-2`
`t=2s`

Use the formula:
`x=v_0t+1/2at^2`

`x=0(2)+1/2(-9.80665)(2)^2`
`x=-19.6133m`

why negative??
What we calculated is displacement, a vector quantity.
In this case, negative sign signifies the stone is travelling down in respect to the origin point.

To get distance , a scalar quantity, in this case just take the magnitude of displacement as it is a straight line motion.

Distance travelled in the first 2s is 19.6133 m