Asked by TTR+S<3

i posted this earlier but got a confusing answer so pls help as best as u can asap!

True or False

1. If a 40 kg person is accelerating at 10 m/s2, then the magnitude of the force acting on him or her is 400 N.
(1 point)
true
false

Multiple Choice

2. How much force is needed to make a 60 kg object accelerate at a rate of 2.0 m/s2? (1 point)
62 N
62 kg
120 N
120 kg

3. What is the acceleration of a 30 kg object when 180 N of force is applied to it? (1 point)
6.0 m/s^2
60 m/s^2
210 m/s^2
5,400 m/s^2

4. Which of the following equations shows how you would solve for mass if you knew the force acting on an object and the acceleration of an object?
(1 point)
m = f/a
m = fa
m = a/f
m = f − a

soooooo need help!!! dunno what they are talking about! cant guess!
pls help asap!!!!!
thanx in advance
Answered by Damon
This is all the same question, Newton's second law.
Force = mass * acceleration
THINK !!!
Answered by TTR+S<3
sry..... im actin real derpy right now
this is for 4. so the answer is b m=fa
kill me if i got that wrong
Answered by Steve
Looks like you need to brush up on one of the most basic and useful identities in mechanics:

F = ma
F(N) = m(kg) * a(m/s^2)
1 N = 1 kg-m/s^2

So, with that in mind,

#1: F = ma = 40kg * 10m/s^2 = 400 kg-m/s^2 = 400N

#2: F = ma = 60kg * 2m/s^2 = 120N
Note that you can eliminate two of the choices just based on the fact that they are not expressed in Newtons.

#3:180N = 30kg * a
(180 kg-m/s^2) / (30kg) = 6 m/s^2
Note that units cancel just like factors of numbers. That's how conversion factors work -- expressing some units in terms of other units.

Here, note that since
F = ma,
a = F/m = 180/30 = 6 m/s^2

#4:
Since F=ma, m = F/a
Don't forget your algebra I just because you're in physics now.
Answered by TTR+S<3
sry, im not that great at math even though this is science.
so the answers are
1. true
2. c
3. a
4. a
right...?

thanx Steve!:)
Answered by Steve
correct. At least it appears you can match up the provided answers with the lists of choices...
Answered by TTR+S<3
omg THANK YOU STEVE!!!!!
Answered by suise
true 1 3 4
Answered by jb
are these the correct answers
Answered by Anonymous
The correct answers are what Steve said.
Answered by Anonymous
10 m/s2
Answered by science help girl
Thanks The correct answers are what steve said .... All of them are correct
Answered by Annie
True or False

1. If a 40 kg person is accelerating at 10 m/s2, then the magnitude of the force acting on him or her is 400 N.
(1 point)
true
false

Multiple Choice

2. How much force is needed to make a 60 kg object accelerate at a rate of 2.0 m/s2? (1 point)
62 N
62 kg
120 N
120 kg

3. What is the acceleration of a 30 kg object when 180 N of force is applied to it? (1 point)
6.0 m/s^2
60 m/s^2
210 m/s^2
5,400 m/s^2

4. Which of the following equations shows how you would solve for mass if you knew the force acting on an object and the acceleration of an object?
(1 point)
m = f/a
m = fa
m = a/f
m = f − a
Answered by Noseybo
True, 3, 1, 1. I just took the test.
Answered by ...
Stop being n00bs
Answer
Thank you everyone.
1. True
2. C
3. A
4. A
Answered by Santana
Thanks everyone for all your help!
Answered by GaBananas
YAY!
True,C,A,A
Is totally correct, thanks , and TTR+S<3
Answered by hidra
Thank everyone soooo much who helped to get the answers!!!! :) <3333
Answered by Peanut buddy
Thanks guys so much!
Answered by #Blessed
Thank You!!!!!!!!!!!!!
Answered by Bob
True c,a,a
Answered by Mrs. Sue
Yes, the answers are True, C, A, A.
Answered by AnswerMan
"TTR+S<3" is 100% correct.

1. True
2. C
3. A
4. A
Answered by I Luv Dean Winchester
TTR+s<3 is correct.
The answers R

1. True
2. C
3. A
4. A
Answered by Jake Paul Fan
1.True
2.C-120 N
3.A-6.0m/s2
4.A-m=f/a
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