Physics
posted by Priyanka .
Four people sit in a car. The masses of the people are 41 kg, 47 kg, 53 kg, and 55 kg. The car's mass is 1020 kg. When the car drives over a bump, its springs cause an oscillation with a frequency of 1.00 Hz. What would the frequency be if only the 41kg person were present?
Hz
I really don't know how to do this, and I can't even make an assumption! Help please!

M=41+47+53+55 = 196 kg
f=sqrt(k/M)/ 2•π
k =(2•π •f)^2•M =7.74•10^3 N/m
f1 =sqrt(k/m)/ = sqrt(7.74•10^3/41)/ 2•π =2.19 Hz. 
Thank you, but I tried this answer its wrong and I don't know why!

Thanks, for the help Elena. For me this answer is also not working its saying that its wrong. :/
Respond to this Question
Similar Questions

physics
When four people with a combined mass of 320 kg sit down in a car, they find that the car drops .80 cm lower on its springs. THen they get out of the car and bounce it up and down. What is the frequency of the car's vibration if its … 
physics
I tried doing this problem but couldn't get the right answer. I don't get how the answer is 2.19cm. Is the distance referring to the vertical or horizontal distance Four people, each with a mass of 73.5 kg, are in a car with a mass … 
physics
Four people, each with a mass of 72.7 kg, are in a car with a mass of 1110 kg. An earthquake strikes. The driver manages to pull of the road and stop, as the vertical oscillations of the ground surface make the car bounce up and down … 
Physics
When four people with a combined mass of 320 kg sit down in a car, they find that the car drops 0.80 cm lower on its springs. Then they get out of the car and bounce it up and down. What is the frequency of the car's vibration if its … 
PHYSICS HELP!
A compact car has a mass of 1400kg. Assume that the car has one spring on each wheel, that the springs are identical, and that the mass is equally distributed over the four springs. What is the spring constant of each spring if the … 
Physics
A compact car has a mass of 1400kg. Assume that the car has one spring on each wheel, that the springs are identical, and that the mass is equally distributed over the four springs. What is the spring constant of each spring if the … 
Physics
Two people with a combined mass of 135 kg hop into an old car with wornout shock absorbers. This causes the springs to compress by 9.80 cm. When the car hits a bump in the road, it oscillates up and down with a period of 1.76 s. Find … 
physic
Two people with a combined mass of 130 kg hop into an old car with wornout shock absorbers. This causes the springs to compress by 9.50 cm. When the car hits a bump in the road, it oscillates up and down with a period of 1.66 s. Find … 
PHYSICS
WHEN SIX PEOPLE WHOSE AVERAGE MASS IS 84 KG SIT DOWN IN A CAR, THEY FIND THAT THE CAR DROPS .84 CM LOWER ON ITS SPRINGS. THEN THEY HAVE GET OUT OF THE CAR AND BOUNCE IT UP AND DOWN. THE ACCELERATION OF GRAVITY IS 9.8 M/S^2. WHAT IS … 
physics
A compact car has a mass of 1150 kg. Assume that the car has one spring on each wheel, that the springs are identical, and that the mass is equally distributed over the four springs. (a) What is the spring constant of each spring if …