Unable to contain himself mr. tessman begins to run to the south parking lot so as not to be caught filling up new water balloons to join the fray. he jumps in his car and drives away so fast his car lands on isabell street 6 m away from the parking lot. assuming the parking lot is 1 m above the street and mr. tessmer launched his car horizontally, how fast was he driving?

490 n  f=125n a=2.5m/s2

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)