Question

A stone is dropped from the edge of a cliff. What is the velocity of the stone in m/s after 3 seconds?

Answer 1

Just asking, do you know what is velocity?

Answer 2

velocity is distance over time right?

Answer 3

well that is speed, but yeah

Answer 4

good enough

Answer 5

yes that is right, thinking about physics

Answer 6

how do i know what the distance is?

Answer 7

what force is acting on the stone?

Answer 8

gravity?

Answer 9

yep

Answer 10

so how does gravity tie in with the formula

Answer 11

the acceleration of gravity can be approximated at -9.8m/s^2

Answer 12

so it gravity the distance? i'm still confused

Answer 13

you can multiply the velocity by the seconds.

9.81(3)=29.43ms

y=5(9.81)(3)carot sign(2), g is gravity (9.81m/s carot sign2)

y=5(9.81)(3) carot sign 2 y=44.145

It is just the same as the last one and just use 4 instead of 3 7=78.48m

Answer 14

so the velocity is 78.48?