physics

A device is designed to measure the speed of a bullet. The device consists of two rotating disks, separated by a distance of d=0.850m, and rotating with an angular speed of 95.0 rad/s. The bullet first passes through the left disk and the through the right disk. It is found that the angular displacement between the two bullet holes is 0.240 rad. From these data, determine the speed of the bullet.

Can anyone please give me some hints to do it? Thanks a lot!

  1. 👍
  2. 👎
  3. 👁
  1. well, find the time for the angular displacement...

    displacement= angularspeed*time find time.

    Then, velocity= distanceapart/time

    1. 👍
    2. 👎
    👤
    bobpursley
  2. Assume that the two discs are on the same shaft, and that the shaft rotates less than one full rotation as the bullet passes from one disc to the other. The shaft rotates 0.240 rad at 95.0 rad/s during the interval of passing from one to the other. The time required to cover the separation distance is therefore
    t = 0.240/95.0 = __ ? sec.
    Divide d = 0.850 m to get the bullet's speed.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Computer

    Katie typed a paper using Microsoft Word. Microsoft Word is a type of? operating system (this one) software hardware data storage device (or this one?) Julian downloaded some music of the music he created to play for his friend.

  2. physics

    The speed of a moving bullet can be determined by allowing the bullet to pass through two rotating paper disks mounted a distance d apart on the same axle (Fig. below). From the angular displacement of the two bullet holes in the

  3. Physics

    A 2.50g bullet, traveling at a speed of 425m/s, strikes the wooden block of a ballistic pendulum. The block has a mass of 270g (a) find the speed of the bullet/block combination immediately after the collision (b) how high does

  4. Physics

    A ballistic pendulum is a device for measuring bullet speeds. One of the simplest versions consists of a block of wood hanging from two long cords. (Two cords are used so that the bottom face of the block remains parallel to the

  1. physics

    A ballistic pendulum, as shown in the figure, was a device used in the past century to measure the speed of bullets. The pendulum consists of a large block of wood suspended from long wires. Initially, the pendulum is at rest. The

  2. physics

    Alice holds a small battery operated device used for tuning instruments that emits the frequency of middle C (262 Hz) while walking with a constant speed of 3.13 m/s toward a building which presents a hard smooth surface and hence

  3. physics

    A ballistic pendulum consists of a 1.25-kg block of wood that is hanging from the ceiling in such a way that when a bullet enters it, the block’s change in height can be recorded as it swings. A bullet having a mass of

  4. Physics

    You have been asked to design a "ballistic spring system" to measure the speed of bullets. A bullet of mass m is fired into a block of mass M. The block, with the embedded bullet, then slides across a frictionless table and

  1. Electricity and Electronics

    A complete circuit contains two parallel-connected devices and a generator for providing the electromotive force. The resistance of the first device is 12 ohms, the resistance of the second device is 4 ohms, and the voltage

  2. physics

    In an experiment to measure the speed of a bullet, the bullet is red into a piece of plasticine suspended from a rigid support by a light thread. (there is a pendulum and two balls, ball one is completely vertical and the bullet

  3. physics

    A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in medical laboratories, for instance, to cause the more dense red blood cells to settle through

  4. ED Tech

    1.What is a mnemonic device? (1 point) A. a tool used to aid hearing~~~ B. a tool used to aid memory C. a tool used in designing text D. a tool used to write sentences 2. Which of the following is an acronym? (1 point) A. RAM B.

You can view more similar questions or ask a new question.