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1. ### I understand how kgm/s = Ns , but how are those equal to J s/m ?

W=Fs where F is .. N s is ..m

3 Answers · Science & Mathematics · 08/06/2011

2. ### Force, Work, and Friction - Pulley Question?

... 3.38 J . (I got that part.) NO the work on 20.0 N = 5.625 J But how does it work with friction? Assuming the coefficient of kinetic friction...

3 Answers · Science & Mathematics · 03/10/2011

3. ### When the particle has the position vector r = (2.00 m)i − (3.00 m) j + (2.00 m)k, the force is F = Fxi + (7.00 N ) j − (7.10 N )k?

...10) When I plug that into wolfram alpha, I get F = -3.80 ( N )

1 Answers · Science & Mathematics · 30/07/2020

4. ### Force F = (-9.0 N )i + (5.0 N ) j acts on a particle with position vector r = (-1.0 m)i + (2.0 m) j ?

...both vectors are in the same plane (i-hat and j -hat), we know that the cross product will be in the k-hat direction... that it asks the torque before the angle, but whatever. Angle can be found by making...

1 Answers · Science & Mathematics · 16/06/2012

5. ### How far must you stretch a spring with k = 1100 N /m to store 300 J of energy?

... the distance over which the average force...average force...is applied. But Favg <> F = kdX, F is sort of...

2 Answers · Science & Mathematics · 27/06/2015

6. ### A spring has a spring constant, k, of 443 N /m. How much must this spring be stretched to store 21 J of PE????

... stored in spring = PE = (1/2)kx^2=21 J spring constant = k = 443 N /m. Stretch = x = sq rt (2PE/k) x = sq rt [2*21/443]= x = sq...

2 Answers · Science & Mathematics · 16/02/2008

7. ### How do you calculate distance of N while using J of work?

.... (350N x 2 metres). She then might carry it any distance, but if she then put it down, NO work will have been done. "...

2 Answers · Science & Mathematics · 16/09/2011

8. ### I pull a spring with a force of 5 N and it stretches 0.50 m, and I say that the work done is 2.50 J .?

... = FavgS = k dX dX/2 = 1/2 k dX^2 = 2.5 J . We need k to verify the answer; so F/dX = k = 5/.5 = 10 N /m. Then... QE = (1/2)*10*.5^2 = ? You can do the math...

1 Answers · Science & Mathematics · 06/02/2013

9. ### The force on a particle of mass m is given by F = 25i-16(t^2) j where F is in N and t is in S.?

...16/3)*[4^3 -2^3) j . or P(4) -P(2) = Po(say)= 50*i - (896/3)* j kg m s^-1 or N s or = 50*i - 298.67* j magnitude of Po = sq rt[50^2 + 298.67^2] = 303 N ...

1 Answers · Science & Mathematics · 24/03/2011

10. ### help me on this question for my physics homework?

You have probably done 5 N * 30 cm = 150 J But you must convert cm to meter, so 5 N * 0.3 m = 1.5 J

4 Answers · Science & Mathematics · 03/09/2012