Question

Newton's Second Law of Motion is expressed as F = ma.



A lawn mower with constant mass is pushed over a length of grass.



How much force is required to triple the acceleration rate?



A.
The force required is one-third the original force.


B.
The force required is three times the original force.


C.
The force required remains constant.


D.
The force required is four times the original.

Answer 1

@tester97

Answer 2

I dont know that one sorry

Answer 3

its okay thanks anyway

Answer 4

@timaashorty

Answer 5

Me neither. im never learned this. ;/

Answer 6

oh thanks anyway! :)

Answer 7

Wished I could have helped.

I'll tagg @aaronq for you. He's pretty good a t chemistry. Maybe he could help you with is although it's biology.

Answer 8

thanks @timaashorty

Answer 9

\[\text{For a constant mass, } \vec{F} \propto \vec{a}\] Acceleration is directly proportional to force, with constant mass. So, if the force were tripled, what do you think should happen to the acceleration?

Answer 10

you're welcome [:

Answer 11

You can rearrange this into \(\dfrac{F}{ma}=0\)

Because the mass remains constant we can ignore it, thus we have:

\(\dfrac{F_1}{a_1}=\dfrac{F_2}{a_2}\) \(\rightarrow\) \(\dfrac{1}{1}=\dfrac{x}{3}\)

Answer 12

so x=3, in comparison you need 3 times as much force. They're proportional to one another, given that the mass is constant.

ps. post these types of q's in the physics section next time.

Answer 13

sorry, i didn't see someone was already helping you, i gave it away.

Answer 14

so the answer is B

Answer 15

@aaronq

Answer 16

i already gave you the answer, if you're not going to bother to read what i wrote then i can't help you any further.

Answer 17

\(\LARGE \color{red}{ in ~comparison ~you ~need~ 3 ~times~ as ~much ~force.}\)

Answer 18

ps. i don't appreciate you talking smack by attempting to post ridiculous testimonials full of swearing, this is the last time I'm helping you.

Answer 19

oh snap...