A mass is suspended vertically from a spring so it is at rest at the equilibrium position. The mass is pulled straight down to an extension x and released so that it oscillates about the equilibrium position. The acceleration is greatest in magnitude and directed upward when the mass is
A. at its maximum upward travel.
B. at the equilibrium point.
C. at its maximum lower travel.
D. somewhere between the equilibrium point and maximum extension.
C. at its maximum lower travel.
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A runner maintains constant acceleration after starting from rest as she runs a distance of 60.0 m. The runner's speed at the end of the 60.0 m is 9.00 m/s. How much time did it take the runner to complete the 60.0 m distance?
A) 6.67 s B) 15.0 s C) 9.80 s D) 10.2 s E) 13.3 s
What size capacitor must be placed in series with a 30. ? resistor and a 40. mH coil if the resonant frequency of the circuit is to be 1000. Hz?
A) 2.0 ?F B) 0.63 ?F C) 3.3 ?F D) 6.0 ?F E) 4.5 ?F
The highly inclined and backwards rotation of Triton supports the hypothesis that Triton is a Kuiper belt object captured by Neptune.
Answer the following statement true (T) or false (F)
John throws a rock down with speed 11 m/s from the top of a 25-m tower. If g = 9.8 m/s2 and air resistance is negligible, what is the rock's speed just as it hits the ground?
a. 19 m/s b. 25 m/s c. 610 m/s d. 22 m/s e. 12 m/s