Download Physics 103 : Quiz 10

Physics 103 : Quiz 10
1. A ball dropped from a height of 4.00 m makes a perfectly elastic collision with the ground. Assuming no
mechanical energy is lost due to air resistance, (a) show that the motion is periodic and (b) determine the period
of the motion. (c) Is the motion simple harmonic? Explain.
2. An object-spring system oscillates with an amplitude of 3.5 cm. If the spring constant is 250 N/m and the
object has a mass of 0.50 kg, determine (a) the mechanical energy of the system, (b) the maximum speed of the
object, and (c) the maximum acceleration.
3. Given that x = A cos t is a sinusoidal function of time, show that v (velocity) and a (acceleration) are also
sinusoidal functions of time. (Hint: Use Equations 13.6 and 13.2.)