Question

The body of a 1285 kg car is supported on a
frame by four springs. The spring constant of
a single spring is 2.80 × 104 N/m. Four people
riding in the car have a combined mass
of 275 kg. When driven over a pothole in
the road, the frame vibrates and for the first
few seconds the vibration approximates simple
harmonic motion.
What is the period of vibration of the car?
Answer in units of s.