physics

A ball of mass 0.075 kg is fired horizontally into a ballistic pendulum. The pendulum mass is 0.350 kg. The ball is caught in the pendulum, and the centerof mass of the system rises a vertical distance of 0.145 m in the earth's gravitational field. What was the original speed of the ball? Assume g=9.80 m/s^2. How much kinetic energy was lost in the collision?

  1. 👍
  2. 👎
  3. 👁
  1. The distance than the block rises with the ball inside will tell you the velocity right after impact (V2), using conservation of energy.

    V2 = sqrt (2gH); H = 0.145 m

    Once you have determined V2, get the original speed of the ball (V1) by using conservation of momentum.
    m V1 = (M+m) V2

    Once you know v and V, calculatring the loss of kinetic energy is easy.

    KE loss = (1/2)m V1^2 - (1/2)(m+M)V2^2

    1. 👍
    2. 👎
  2. 9.55

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A simple pendulum is made from a ping-pong ball with a mass of 10 grams, attached to a 60-cm length of thread with negligible mass. The force of air resistance on the ball is Fair =−b𝑥̇, in which = 0.016 kg s-1

  2. Physics

    A student performs a ballistic pendulum experiment using an apparatus similar to that shown in the figure. Initially the bullet is fired at the block while the block is at rest (at its lowest swing point). After the bullet hits

  3. physics

    1. A bullet has mass 5g. It is fired with a velocity of 50 ms-1 (g=9.8 ms-2) and strikes on a pendulum of mass 5 kg. Find out the height at which the pendulum is raised.

  4. physics

    in a ballistic pendulum experiment, projectile 1 result in a maximum heigh h of the pendulum equal to 2.6 cm. a second projectile causes the pendulum to swing twice as high, h2=5.2 cm. the second projectile was how many times

  1. physics

    As shown below, a bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed of v/2. The pendulum bob is suspended by a stiff rod of length and negligible mass. What is the

  2. Physics

    A 5.00-g bullet is fired into a 500-g block of wood suspended as a ballistic pendulum. the combined mass swings up to a height of 8.00 cm. What was the magnitude of the momentum of the combined mass immediately after the

  3. Pre-Calculus

    The Period T, in seconds, of a pendulum depends on the distance, L, in meters, between the pivot and the pendulum's centre of mass. If the initial swing angle is relatively small, the period is given by the radical function

  4. Physics

    A bob of mass m is suspended from a string of length L, forming a pendulum. The period of this pendulum is 1.97 s. If the pendulum bob is replaced with one of mass 1/2 m and the length of the pendulum is increased to 2.50 L, what

  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

    A ballistic pendulum is used to measure the speed of bullets. It comprises a heavy block of wood of mass M suspended by two long cords. A bullet of mass m is fired into the block in the horizontal direction. The block, with the

  3. physics

    As shown in the figure, a bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed of v/2. The pendulum bob is suspended by a stiff rod of length ℓ and negligible mass. 2.1

  4. Physics

    A 12.0-g bullet is fired into a 1 100-g block of wood which is suspended as a ballistic pendulum. The combined mass swings up to a height of 8.50 cm. What was the kinetic energy of the combined mass immediately after the

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