Use the worked example above to you solve this problem. a 1.27 x10^3 kg car is constructed on a frame supported by four springs. each spring has a spring constant of 2.03 x10^4 n/m. if two people riding in the car have a combined mass of 1.60 x10^2 kg, find the frequency of vibration of the car when it is driven over a pothole in the road. find also the period and the angular frequency. assume the weight is evenly distributed.

Dshould be the right answer i think

The answer is d, you can easily test a theory! hope i you : )

The figure is missing but we can answer anyway.the correct answer is "releasing the string". in fact, when the person is holding the bow and the arrow, the kinetic energy of the arrow is still zero (because the arrow is not moving). the moment the arrow is released, it acquires a velocity v, so its kinetic energy will become different from zero: where m is the mass of the arrow and v its velocity.  all the other options, instead, do not increase the kinetic energy of the system: -  pulling farther back on the string : this will just increase the elastic potential energy of the system-  holding the arrow higher: this will increase the gravitational potential energy of the system (which is given by u=mgh, where h is the height above the ground)-  decreasing the mass of the arrow: this will decrease the gravitational potential energy of the system (which is given by u=mgh, where m is the mass)