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1. ### A mass m = 13 kg rests on a frictionless table and accelerated by a spring with spring constant k = 5032 N/ m . Th?

2 Answers · Science & Mathematics · 07/08/2020

2. ### A block with mass m = 12 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 4784 N/ m after being?

...½mv² = ½ * 12kg * v² v = 9.8 m /s² 3) W = µmgd = 0.44 * 12kg * 9.8m... It's possible you'll have to give that a negative sign. I consider it understood. 4...

1 Answers · Science & Mathematics · 07/08/2020

3. ### If the coefficient of kinetic friction between the 150lb crate and the ground is us=0.21. Determine the speed of the crate when t=4s.?

...by F(net) = F(applied) - F(friction) =>ma = F - μ k x N =>68 x a = 441 - 0.21 x (mg) =>68a = 441 - 0.21 x 68 x 9.8 => a = 4.43 m /s^2 Thus by v = u + at => v = 0 + 4.43 x 4 => v = 17.71 m /s NOTE: As there...

1 Answers · Science & Mathematics · 06/08/2020

4. ### physics magnitude question thanks?

... the cross product for a proton (positive charge) experiencing F with direction "-j" and v with direction "i" it must be that B has direction " k " -- UP. Since v and...

1 Answers · Science & Mathematics · 29/07/2020

5. ### A single mass (m1 = 2.7 kg) hangs from a spring in a motionless elevator. The spring constant is k = 306 N/ m .?

1) Δx = mg / k = 2.7kg * 9.8m/s² / 306N/ m = 0.086 m or 8.6 cm 2) F = mg = 5.4kg * 9.8m...39;s Second, net F = ma = 8.1kg * (9.8 - 1.9) m /s² = 64 N All answers to...

3 Answers · Science & Mathematics · 29/07/2020

6. ### I need help on this physics problem!?

...two of them are a closed system (there ...kinetic energy. Let's call v the final speed of the 2.0 g object... = EP2 + EK2 k q^2 / r = 0.5( 4m1 + m2 ) v ^2 v = 7.746 m /s or 7.7 m /s to 2 sig. ...

2 Answers · Science & Mathematics · 23/07/2020

7. ### Could you help me with Physics II?

...this: U = 2*(1.602*10^-19 C)* V = 9.239*10^-28/sqrt( a ^2+y^2) J* m Now, equate the final energy U to the initial energy K and solve for y: 9.239*10^-28/sqrt( a ^2+y^2...

1 Answers · Science & Mathematics · 22/07/2020

8. ### What is the spring constant?

... when leaving the spring: 4.9 m = v * 0.589 s v = 8.323 m /s Now, use conservation of energy on the ball-spring...final state =  1/2 mv^2 1/2 kx^2 = 1/2 mv^2 => 1/2 k (0.21 m )^2 = 1/2(0.02 kg)(8.323 m /s)^2 0.02205 m ^2...

2 Answers · Science & Mathematics · 22/07/2020