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1. ### 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

2. ### A discus thrower applies a force F= (at^2)i +(B + yt) j to a discus with a mass of 2.00 kg; where a = 30.0 N /s^2; B= 40.0 N ; and Y = 5.0 N /s:?

Given F= (at^2) i + (B + yt) j   As ∆v/∆t = a = F/m =>dv/dt = 1/2 x {(at^2) i + (B + yt) j } =>dv = 1/2 x {ai...

2 Answers · Science & Mathematics · 17/04/2020

3. ### In vectors a and b find m and n ..?

...; a > and <b> are non-parallel, then j < a > + k<b> = 0, if j = k = 0 If j = (m+ n +1) and k = -(3n+2), then m+ n +1 = 0 3n + 2 = 0 → n = -2/3 m - 2/3 + 1 = 0 m...

2 Answers · Science & Mathematics · 06/09/2019

4. ### Mary weighs 549 N and she walks down a flight of stairs to a level 3.2 m below her starting point. What is the change in Mary’s potential...?

Fd is work done (undone). (549)(3.2).= 1756.8 J It's a negative because potential is lost, so, -1756.8 J .  They probably want...

3 Answers · Science & Mathematics · 13/12/2019

5. ### Math proof help - partitions and equivalence relations?

aℛb  iff  a ∈ A ᵧ & b∈ A ᵧ • ℛ is reflexive...symmetric,  aℛb then bℛa, in fact   a ∈ A ᵧ & b∈ A ᵧ then b∈ A ᵧ & a ∈ A ᵧ then bℛa...

1 Answers · Science & Mathematics · 25/06/2020

6. ### Physics: Springs: A block of mass 1.4 kg is attached to a horizontal spring that has a force constant 1100 N /m as shown in the figure...?

...½ * 1100N/m * (0.020m)² = 0.22 J At lesser compression, that initial energy has...*1100*0.0040² - 4.2*(0.020 - 0.0040) = 0.144 J and so it seems to me that we have in fact...

1 Answers · Science & Mathematics · 18/10/2019

7. ### What is the final level that the electron jumps to?

...13.6eV * 1.6e-19J/eV = 2.176e-18 J so 9.17063e-20 J = 2.176e-18J * (1/n² - 1/7²) means that 1/n² = 0.0626 1/ n = 0.25 n = 4 Hope this helps!

1 Answers · Science & Mathematics · 27/04/2020

8. ### Find the tangential and normal components of the acceleration vector. (r)= (t^2 +1)I +t^3 j , t>=0?

...t)| / |v(t)| where x represents the cross product and we already know |v(t)| a _ n = |(2t i^ + 3t² j ^) x (2 i^ + 6t j ^)| / √[t²(4 + 9t²)] a _ n = |(2t*6t - 3t²*2...

3 Answers · Science & Mathematics · 11/11/2019

9. ### What is the final level that the electron jumps to?

...-19J/eV * (1/n² - 1/7²) 2.13426E-18 J = 2.176E-18J * (1/n² - 1/7²) 0.981 = 1/n² - 1/49 1/n² = 0.981 + 1/49 = 1.00 n = 1 first level

1 Answers · Science & Mathematics · 10/04/2020

10. ### A 19 N horizontal force F with arrow pushes a block weighing 6.0 N against a vertical wall. ?

...block would be accelerating). Assuming a "positive" value for your applied... by the wall is Fwall = (-19 i^ + 6.0 j ^) N Questions welcome. If you find this helpful...

2 Answers · Science & Mathematics · 27/06/2020