physics

A .22 rifle bullet traveling at 360m/s strikes a block of wood, which penetrates to a depth of .110m. The mass of the bullet is 1.80g. Assume a constant retarding force.A) how much time is required for the bullet to stop? b) what force in newtons soes the wood exert on the bullet?

a) should have been 6.11X10^-4 s
b) should have been 1060N
For a) I tried using v=d/t for time and for b) I used f=ma to find the force. What am I doing incorrectly?

The average force on the wood * distance= KE of the bullet

F*.11= 1/2 .0018*360^2

That will give you the average force.

time? avgvelocity*time= distance
1/2 360 * time= .110
Time= you do it.

Hi Bob
Care to elaborate on that clock question that I left you a note on below? I don't get it. I'm dying with curosity.

  1. 👍 0
  2. 👎 0
  3. 👁 710
asked by Chris
  1. You can get the answer of time by having this formula :

    x = 1/2 (v0-v)a.t

    just transpose it. . . . .

    a= 9.806 m/s^2

    1. 👍 0
    2. 👎 0
    posted by Quinee

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    A .22 rifle bullet, traveling at 373m/s, strikes a block of soft wood, which it penetrates to a depth of 0.125m. The block of wood is clamped in place and doesn't move. The mass of the bullet is 1.90. Assume a constant retarding

    asked by Anonymous on February 8, 2010
  2. physics

    1) a bullet of mass 0.02 kg is fired into a block of wood of mass 1.5 kg resting on a horizontal table. The block moves offwith an initial speed of 8 m/s. Estimate the speed with the bullet strikes the block. 2) The bullet in

    asked by waslat on March 15, 2014
  3. Science: Physics

    A physics teacher shoots a .30 caliber rifle at a 0.47 kg block of wood. The rifle and wood are mounted on separate carts that sit atop an air track (like a linear air hockey table--ie. frictionless). The 5.7 kg rifle fires a 27

    asked by Joan on January 6, 2011
  4. Physics

    A rifle bullet, traveling at "v1" strikes a large tree an penetrates to a depth of "d". the mass of the bullet is "m". assume the de-acceleration is constant as it penetrates the tree. a) the time required to stop. b) the

    asked by John on September 27, 2015
  5. Physics

    a point 22 caliber rifle fires a 1.8 gram bullet at a 400m/s into a block of wood. If the bullet penetrates to a depht of 10cm find the desaceleration of the bullet. The force exerheted on the bullet, and the time.

    asked by Guelmy on November 5, 2014
  6. Physics

    A 14g bullet is traveling at 306m/s when it strikes a block of wood. If the block of wood exerts a force of 50,000 N opposing the motion of the bullet, how far will the bullet penetrate the block of wood?

    asked by HELP on February 20, 2014
  7. Physics

    A 41g bullet is traveling at 499m/s when it strikes a block of wood. If the block of wood exerts a force of 50,000 N opposing the motion of the bullet, how far will the bullet penetrate the block of wood?

    asked by Laurel on March 20, 2012
  8. Physics

    1. A bullet of 0.0500 kg is fired into a block of wood. Knowing that the bullet left the gun with a muzzle velocity of 350. m/s, and the bullet penetrates .15 m into the block of wood, determine: a) The average force required to

    asked by Help Please on July 14, 2012
  9. physics

    A rifle with a mass of 12 g, traveling with a speed of 425 m/s strikes a large wooden block, which it penetrates to a depth of 15 cm. determine the magnitude of the retarding force that acts on the bullet.

    asked by sally on October 22, 2014
  10. Physics

    A bullet of mass 25kg strikes horizontally an immovable block of wood with a velocity of 250m/s and penetrates it a distance of 1m. Calculate the resistance of the wood on the bullet , assuming the resistance to be uniform. How

    asked by Salina on August 8, 2013

More Similar Questions