physics

A Princeton prof. (mass = 67.0 kg), surprised by the large stopping force he calculates for jumping flat footed from a height of 0.11 m, decides to try the experiment. Calculate he deceleration (in g's) if he stops in a distance of 0.30 cm. (Do not try this. You could easily break an ankle!)

  1. 👍
  2. 👎
  3. 👁
  1. Potential energy mgh
    work stopping: force*distance

    set them equal.

    1. 👍
    2. 👎
    👤
    bobpursley
  2. yeah you wanna do that and tell me what you get or just tell me what you used for the masses because i keep getting wrong.

    1. 👍
    2. 👎
  3. i've gotten 41.57 41.92 and 5.68 when i only used the mass of the bullet

    1. 👍
    2. 👎
  4. mass of the bullet? come back to planet Earth.
    Force=massman*g*height/distance

    put height and distance in meters.

    1. 👍
    2. 👎
    👤
    bobpursley
  5. ha wrong question sorry.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    The drawing shows a large cube (mass = 25 kg) being accelerated across a horizontal frictionless surface by a horizontal force . A small cube (mass = 4.0 kg) is in contact with the front surface of the large cube and will slide

  2. physics

    1. A cart of weight 20 N is accelerated across a level surface at .15 m/s^2. What net force acts on the wagon? (g=9.8m/s^2) 2. An automobile of mass 2000 kg moving at 30 m/s is braked suddenly with a constant braking force of

  3. physics

    A large truck with a mass of 3200 kg is pulling a trailer with a mass of 2400 kg. Both are accelerating at a rate of 0.45 m/s^2 . Determine the tension force between the truck and the trailer, and determine the force with which

  4. Statistics

    A car manufacturer is interested in conducting a study to estimate the mean stopping distance for a new type of brakes when used in a car that is traveling at 60 miles per hour. These new brakes will be installed on cars of the

  1. math

    If a car is speeding down a road at 40 (mph), how long is the stopping distance compared to the stopping distance if the driver were going at the posted speed limit of 25 ? Express your answer as a multiple of the stopping

  2. Physics

    A small car (mass 380 ) is pushing a large truck (mass 1000 ) due east on a level road. The car exerts a horizontal force of 1580 on the truck. What is the magnitude of the force that the truck exerts on the car?

  3. Math

    An automobile of mass 2000 kg moving at 30 m/s suddenly stopped with a constant braking force of 10000 N. How far does the car travel before stopping?

  4. physics

    A force acts on a 2kg mass and gives it an acceleration of 3 m/s^2. what acceleration is produced by the same force when acting on a mass of (1) 1kg? (2) 4kg? (3) how large is the force?

  1. physics

    A steel ball of mass m=5 g is moving at a speed of 250 m/s toward a large mass M=2.2 kg which is connected to a relaxed spring, as shown below. When the ball reaches the large mass it collides and bounces off without losing any

  2. physics

    A large bar magnet (mass of 0.4 kg) exerts a 5 N force on a small bar magnet (mass of 0.1 kg) located 20 cm away. Calculate the force exerted by the small bar magnet on the large one.

  3. Physics

    You place two charges a distance r apart. Then you double each charge and double the distance between the charges. How does the force between the two charges change? a) The new force is twice as large. b) The new force is half as

  4. Physics

    Please Help!!! A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.5 m before stopping. The police officer, knowing that

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