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
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!:)
Thank you everyone.
1. True
2. C
3. A
4. A
TTR+s<3 is correct.
The answers R
1. True
2. C
3. A
4. A
1.True
2.C-120 N
3.A-6.0m/s2
4.A-m=f/a
This is all the same question, Newton's second law.
Force = mass * acceleration
THINK !!!
True, 3, 1, 1. I just took the test.
Thanks everyone for all your help!
YAY!
True,C,A,A
Is totally correct, thanks , and TTR+S<3
Thank everyone soooo much who helped to get the answers!!!! :) <3333
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
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.
correct. At least it appears you can match up the provided answers with the lists of choices...
omg THANK YOU STEVE!!!!!
are these the correct answers
The correct answers are what Steve said.
10 m/s2
Thanks The correct answers are what steve said .... All of them are correct
Stop being n00bs
Thanks guys so much!
Thank You!!!!!!!!!!!!!
True c,a,a
Yes, the answers are True, C, A, A.
"TTR+S<3" is 100% correct.
1. True
2. C
3. A
4. A
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