# physics

A block of mass 4kg hangs from a spring of force constant 400N/m.the block is pulled down 15cm below the equilibrium position and released. Fimd: a) amplitude, frequency and period of vibration. b) kinetic energy when the block is 10 cm above the equilibrium position. c) time it takes the block to go 12 cm below the equilibrium pOsition on the way up to 9 cm above the equilibrium position

1. 👍 0
2. 👎 0
3. 👁 174
asked by Ailen
1. a) are not these standard formulas?
b) You know total energy from the amplitude, and at 10 cm, you know from the force equation the PE, so then you know Ke
c) use the displacement equation to figure time for each position, the difference in time is the time taken.

1. 👍 0
2. 👎 1

## Similar Questions

1. ### physics

a block of mass 2 kg and block B of mass 8 kg are connected by a spring of spring constant 80 N/m and negligible mass. The system is being pulled to the right across a horizontal frictionless surface by a horizontal force 4 N with

asked by shelly on June 9, 2008
2. ### Physics

A block has mass 800 g, whose is fasten to a spring with spring constant k is 70 N/m. The block is pulled a distance x = 15 cm from its equilibrium position at x = 0 on a frictionless surface and released from rest at t = 0. (a)

asked by Dia on December 18, 2011
3. ### physics

an 8g bullet is shot into a 4kg block, at rest on a frictionless surface. the bullet remains lodged in the block. the block moves into a spring and compresses it 9.40cm. the force constant of the spring is 1000 N/m. a) what is the

asked by Anonymous on July 22, 2011
4. ### physics

a 20kg block is connested to a 30kg block by a string that passes over a frictionless pully. the 30kg block is connected to a spring that has niglible mass and a force constant of 250n/m.the 20kg block is pulled 20cm down the

asked by sello on April 7, 2010
5. ### physics

A block of ice of mass 4.10 kg is placed against a horizontal spring that has force constant k = 210 N/m and is compressed a distance 2.60×10−2 m. The spring is released and accelerates the block along a horizontal surface. You

asked by ami on October 7, 2010
6. ### Physics

A 20.0 kg block is connected to a 30.0 kg block by a string that passes over a light, frictionless pulley. The 30.0 kg block is connected to a spring that has negligible mass and a force constant of 200 N/m. The spring is

asked by mightymouse on March 3, 2009
7. ### Physics

A block of mass m is dropped onto a relaxed spring constant k. The block becomes attached to the spring and compresses the spring a distance d before momentarily stopping. (Use any variable or symbol stated above along with the

asked by Rachel on February 25, 2013
8. ### Physics

A block with a mass m = 3.50 kg sits on a surface with a coefficient of static friction µs = 0.520. A spring with spring constant k = 75.0 N/m is hooked onto the block, and is slowly pulled horizontally, gradually stretching the

asked by Jade on November 26, 2015
9. ### Physics

Block A of mass 2.0 kg and Block B of 8.0 kg are connected by a spring of spring constant 80 N/m and negligible mass. The system is being pulled to the right across a horizontal frictionless surface by a horizontal force of 4.0 N,

asked by Alexa on November 14, 2012
10. ### physics

A 20.0 kg block is connected to a 30.0 kg block by a string that passes over a light, frictionless pulley. The 30.0 kg block is connected to a spring that has negligible mass and a force constant of 300 N/m, as shown in the figure

asked by carlton on November 14, 2011

More Similar Questions