Amass m = 1.1 kg hangs at the end of a vertical spring whose top end is fixed to the ceiling. the spring has spring constant k = 55 n/m and negligible mass. the mass undergoes simple harmonic motion when placed in vertical motion, with its position given as a function of time by y(t) = a cos(ωt – φ), with the positive y-axis pointing upward. at time t = 0 the mass is observed to be passing through its equilibrium height with an upward speed of v0 = 4.6 m/s.
1. find the angular frequency of the oscillation, in radians per second.
2. find the smallest positive value of phi. in radians. calculate the value of a. in meters.

wavelength divides in half and speed stays the same.

your answer is c! hope this : )

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force