College Physics

A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. Starting from rest, a 60.0 kg athlete jumps down onto the platform from a height of 0.600 m. While she is in contact with the platform during the time interval 0 < t < 0.8 s, the force she exerts on it is described by the function below.
F = (9 200 N/s)t - (11 500 N/s2)t2

Assume the positive y-axis points upward.
(a) What was the athlete's velocity when she reached the platform?

(b) What impulse did the athlete receive from the platform?

(c) What impulse did the athlete receive from gravity while in contact with the platform?

(d) With what velocity did she leave the platform?

(e) To what height did she jump upon leaving the platform?

  1. 👍 0
  2. 👎 0
  3. 👁 417

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    You are designing a hydraulic lift for an automobile garage. It will consist of two oil-filled cylindrical pipes of different diameters. A worker pushes down on a piston at one end, raising the car on a platform at the other end.

  2. physics

    A man is standing on a platform that is connected to a pulley arrangement, as the drawing shows. By pulling upward on the rope with a force the man can raise the platform and himself. The total mass of the man plus the platform is

  3. Math

    A production crew is assembling a three-level platform inside a stadium for a performance. The platform has the dimensions of 4x long and 2x wide, the middle box has the dimensions of 6x long and 4x wide, and the bottom box has

  4. Physics

    A metal block of mass 5kg lies on a rough horizontal platform. If a horizontal force of 8 N applied to the block through its center of mass just slides the block on the platform, then the coefficient of limiting friction between

  1. Physics

    Calculate the force of friction that keeps a 80-kg person sitting on the edge of a horizontal rotating platform when the person sits 2.4m from the center of the platform and has a tangential speed of 3.2m/s . Express your answer

  2. URGENT! Due soon and I used 8 of 10 attempts

    Archaeologists can determine the age of artifacts made of wood or bone by measuring the amount of the radioactive isotope 14C present in the object. The amount of isotope decreases in a first-order process. If 14.5% of the

  3. Physics

    A large horizontal circular platform (M=143.1 kg, r=3.01 m) rotates about a frictionless vertical axle. A student (m=75.3 kg) walks slowly from the rim of the platform toward the center. The angular velocity ω of the system is

  4. algebra

    a production crew is assembling a three-level platform inside a stadium for a performance. the platform has dimensions shown in the diagram and has a total volume of 1250 cubic feet. What is the volume, in terms of x, for each of

  1. Math

    The SI unit of measure for length-the meter-would be most appropriate when a. Measuring the wingspan of an insect b. measuring the height of a building. c. measuring the length of an ant. measuring the distance between two cities

  2. English

    Which statement provides evidence that a product such as the thermometer pill will be helpful to athletes and coaches? A) Many athletes need to be educated on the dangers of heatstroke. B) On average the cost is $50.00 per pill.

  3. Physics

    An aerialist on a high platform holds onto a trapeze attached to a support by an 8.0-m cord. (See the drawing.) Just before he jumps off the platform, the cord makes an angle of 41° with the vertical. He jumps, swings down, then

  4. Physics

    A 200-kg cart is pushed slowly up an incline. How much work does the pushing force do in moving the cart up to a platform 1.5 m above the starting point if friction is negligible? (Use above problem) If the distance along the

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