The spring has a stiffness k 50 lb/ft and an unstretched length of 2 ft. As shown, it is confined by the plate and wall using cables so that its length is 1.5 ft. A 4.4-lb block is given a speed u when it is at A, and it slides down the incline having a coefficient of kinetic friction = 0.2. It strikes the plate and pushes it forward 0.25 ft before stopping. Neglect the mass of the plate and spring (Elgure 1).

The spring has a stiffness k 50 lb/ft and an unstretched length of 2 ft. As shown, it is confined by the plate and wall using cables so that its length is 1.5 ft. A 4.4-lb block is given a speed u when it is at A, and it slides down the incline having a coefficient of kinetic friction = 0.2. It strikes the plate and pushes it forward 0.25 ft before stopping. Neglect the mass of the plate and spring (Elgure 1).

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Spring Potential Energy

The potential energy is the energy possessed by a body by virtue of its position or the energy held by the object due to its position relative to other objects, its force like stresses, charge, and other factors affecting the particles of the body. The potential energy is the measure of the net work done by or on the body. The spring potential energy is the potential energy stored due to the deformation of an elastic spring and this elasticity is due to the stretched spring. The elasticity is the ability of a solid-state matter to come back to its equilibrium position or original position after any kind of external force is acted on it. It is also known as Elastic potential energy. The potential energy here is caused due to the displacement of the spring from its equilibrium position to another position and this potential energy is equal to the net work done due to the stretching of the spring. It also resembles the same mechanics of the oscillation of a simple pendulum, where due to the external force, the object moves from its equilibrium position to its maximum ends and the periodic motion continues till it comes back to the equilibrium position to rest. 

Question

Kahalben

The spring has a stiffness k = 50 lb/ft and an
unstretched length of 2 ft. As shown, it is confined by the
plate and wall using cables so that its length is 1.5 ft. A
4.4-1b block is given a speed A when it is at A, and it
slides down the incline having a coefficient of kinetic
friction=0.2. It strikes the plate and pushes it forward
0.25 ft before stopping. Neglect the mass of the plate
and spring. (Figure 1).
Figure
k = 50 lb/ft
30
1 of 1
Y
Part A
Determine the speed of the block at A.
Express your answer to three significant figures and include the appropriate units.
VA 5.30
Sulgmit
ft
S
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