# Physics

posted by .

A 0.70 kg mass at the end of a spring vibrates 4.0 times per second with an amplitude of 0.15 m.

Determine the velocity when it passes the equilibrium point.

Determine the velocity when it is 0.11 from equilibrium.

Determine the total energy of the system.

• Physics -

sorry, .11 m from equilibrium.

• Physics -

x=A*sinwt
v= Aw*coswt
a= -Aw^2sinwt

at the equilibrium point wt is PI (cosine is max), so V-Aw you know A, and w=2PI/Period, and period is given (.25sec).
when position is .11,
.11=Asinwt solve for wt, then v= Awcoswt

energy? 1/2 m v^2 where v is vmax, or Aw

• Physics -

what is Pl?

• Physics -

PI is 3.14159...

• Physics -

oh... pi... thanks

• Physics -

how do you know period is .25 sec?

• Physics -

frequency is four times per second! (1 sec divided by four times is .25)

## Similar Questions

1. ### physics

A 0.50 kg mass at the end of a spring vibrates 6.0 times per second with an amplitude of 0.18 m. (a) Determine the velocity when it passes the equilibrium point. 1Your answer is incorrect. m/s (b) Determine the velocity when it is …
2. ### Physics

A 0.50-kg mass at the end of a spring vibrates 3.0 times per second with an amplitude of 0.15 m. Determine (a) the velocity when it passes the equilibrium point, (b) the velocity when it is 0.10 m from equilibrium, (c) the total energy …
3. ### Physics

A .6-kg mass at the end of a spring vibrates 3.0 times per second with an amplitude of .13 m. Determine a.) the velocity when it passes the equilibrium point, b.) the velocity when it is .1 m from equilibrium. c.) the total energy …
4. ### Physics

A spring force constant 210 N/m vibrates with an amplitude of 28.0 cm when .250 kg hangs from it. What is the equation describing this motion as a function of time?
5. ### Physics

A 240 g mass is attached to a spring of constant k = 5.4 N/m and set into oscillation with amplitude A = 26 cm. (a) Determine the frequency of the system in hertz. (b) Determine the period. (c) Determine the maximum velocity of the …
6. ### Physics 203

A block with mass of 5.0kg is suspended from an ideal spring having negligible mass and stretches the spring 0.20m to its equilibrium position. A) What is the force constant of the spring?
7. ### physics

a vertical spring with spring stiffness constant 305 n/m oscillates with an amplitude of 28.0 cm when 0.260 kg hangs from it. the mass passes through the equilibrium point (y=0) with positive velocity at t=0. (a) what equation describes …
8. ### Physics

A 0.52kg mass at the end of a spring vibrates 4.0 times per second with an amplitude of 0.15m . a. Determine the velocity when it passes the equilibrium point. b.Determine the velocity when it is 0.12m from equilibrium c.Determine …
9. ### physics

a 0.25 kg mass at the end of a spring oscillates 2.2 times per second with an amplitude of 0.15m. Determine the speed when it passes the equilibrium point and the speeed when it is 0.1 m from equilibrium
10. ### Physics

A mass-on-a-spring system has m = 54 kg and k = 225 N/m. The mass is pulled a distance 0.25 m from its equilibrium position and then released. (a) What is the maximum acceleration of the mass?

More Similar Questions