A ball vibrates back and forth from the free end of an ideal spring having a force constant (spring constant) of 20 N/m. If the amplitude of this motion is 0.30 m,
what is the kinetic energy of the ball when it is 0.30 m from its equilibrium position?
A) 0.00 J
B) 0.22 J
C) 0.45 J
D) 0.90 J
E) 1.4 J
Question 2
What is the charge on 1.0 kg of protons? (e = 1.60 10-19 C, mproton = 1.67 10-27 kg)
A) 1.0 C
B) 1000 C
C) 9.6 107 C
D) 6.0 1026 C
E) 6.0 1023 C