1) A spring-mass system consists of a 4.00 kg mass on a frictionless surface, attached to a spring with a spring constan

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1) A spring-mass system consists of a 4.00 kg mass on a
frictionless surface, attached to a spring with a spring
constant of 1.60x10° N/m. The amplitude of the oscillations is
0.150 m. Calculate the following quantities:
a) Erot (the total mechanical energy in the system)
b) Vmax
c) x when v = 10.0 m/s.
2)When a proton is in positioned at the point, P, in the figure
above, what is the net electrostatic force it
experiences?
(m. =1.67x102 kg, 9,: =1.60x10-° C)