Question

yo @agent0smith

Answer 1

A motorcycle is going 30m/s. If the brakes are applied and the motorcycle's acceleration is -3.0 m/s^2, how far does the motorcycle go in 4.0 seconds?
A. 120m
117m
108m
96m
88m

Answer 2

\[\large x = v_i t + \frac{ 1 }{2 }at^2 \]
vi = 30
a=-3
t=4
x=?

Answer 3

30(4)+1/2(-3)(4)^2
= 96?

Answer 4

You jump off a cliff into the water below. It takes 4.0 seconds to hit the water. How high is the cliff?
40
80
120
200
400

Answer 5

same formula as above,

vi = 0
a=9.8
t=4

Answer 6

Umm I got 19.6??

Answer 7

Nope, write out the formula again like last time

Answer 8

Oh I didn't square it...

Answer 9

I'm getting 78.4

Answer 10

So 80m?

Answer 11

ugh you don't listen :P it's so much easier when you just write out your work.

Yes but I'm not happy about it.

Answer 12

Lol I did write it out hahha I swear lol.

Answer 13

You gonna hate me now? Hahha
0(4)+1/2(9.8)(4)^2
=78.4
You gonna punish me now for not writing my work out teacher? LOL

Answer 14

it's cos it's far easier to check and i don't have to work it out myself :P you're the student,
you do the work!