Question

The acceleration of gravity on the moon is about 1.6 m/sec 2. An experiment to test gravity compares the time it takes objects to reach a speed of 10 m/sec after being dropped from rest. How long does an object dropped on the moon have to fall to reach this speed compared to an object dropped on Earth?
Select one:
a. 1.6 times as long
b. 6.1 times as long
c. 9.8 times as long
d. 15.7 times as long

Answer 1

Okay so for the moon it is \(1.6m/s^2\) and on the earth it is \(9.81m/s^2\)

Answer 2

yeah

Answer 3

But we want to find the ratio in terms of time.

Answer 4

So first we have to find out how long it takes to fall on moon and how long it takes to fall on earth.

Answer 5

oh so it obliviously falls slower

Answer 6

Yeah

Answer 7

so the logical answer would be a

Answer 8

No, all of the answers assume it falls slower.

Answer 9

We want to know how much slower

Answer 10

ohh we use an equation to solve it

Answer 11

If we know \(v_i=0m/s, v_f=1.6m/s,a=9.81m/s^2\) how long will it take to fall on earth?

Answer 12

umm.....so we find time hold on

Answer 13

\[\Delta v=v_f-v_i=at\]

Answer 14

its 0.16 seconds

Answer 15

I made a mistake... \(v_f = 10m/s\)

Answer 16

Oh okay so it would be 1 second

Answer 17

There are two \(a\)...\[\Large a_{earth}=9.81m/s^2, \ a_{moon} = 1.6m/s^2\]

Answer 18

So now find the time it would take on the moon.

Answer 19

okay it would be what i said before 0.16 seconds

Answer 20

So the answer is a?

Answer 21

No

Answer 22

why?

Answer 23

Because
10/1.6 is not 0.16

Answer 24

oh so what do we do?

Answer 25

We divide to get the correct time for the moon.

Answer 26

divide what?
10/1.6

Answer 27

if its that i got 6.25

Answer 28

so the answer is b?

Answer 29

sorry I was gone. b is correct

Answer 30

i know :D