AP Free Response Question
2006 C2
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A nonlinear spring is compressed various distances
x
, and the force
F
required to compress it is measured for each distance. The data are shown in the table below.
Assume that the magnitude of the force applied by the spring is of the form F(x) = Ax
^{2}
.
(a) Which quantities should be graphed in order to yield a straight line whose slope could be used to calculate a numerical value for A?
(b) Calculate values for any of the quantities identified in (a) that are not given in the data, and record these values in the table above. Label the top of the column, including units.
(c) On the axes below, plot the quantities you indicated in (a) . Label the axes with the variables and appropriate numbers to indicate the scale.
(d) Using your graph, calculate A.
The spring is then placed horizontally on the floor. One end of the spring is fixed to a wall. A cart of mass 0.50 kg moves on the floor with negligible friction and collides headon with the free end of the spring, compressing it a maximum distance of 0.10 m.
(e) Calculate the work done by the cart in compressing the spring 0.10 m from its equilibrium length.
(f) Calculate the speed of the cart just before it strikes the spring.
Topic Formulas
Description
Published Formula
angular displacement
angular momentum
angular velocity
center of mass
centripetal acceleration
friction
gravitational force (vector)
gravitational potential energy
Hooke's Law
impulse
kinetic energy
linear momentum
linear velocity and angular velocity
moment of inertia
net torque
Newton's 2nd Law
Newton's Law of Universal Gravitation
period and frequency
period of a simple pendulum
period of a spring
potential elastic energy
potential energy
power (dot product)
rate of change of momentum
rate of change of work
rotational kinetic energy
torque
uniform acceleration  displacement and instantaneous velocity
uniform acceleration  instantaneous position
uniform acceleration  instantaneous velocity
work (dot product)
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