1. A golf ball is released from rest from the top of averytall building. Choose

Question

1. A golf ball is released from rest from the top of averytall building. Choose a coordinates system whose origin is at thestarting point of the ball, and whose y axis points verticallyupward. The accerelation of gravity is 9.8 m/s2.Neglecting air resistance, calculate the velocity of the ball after2.6 sec .Answer in units of m/s b. What is the position of the ball after 2.6 sec ?(neglect air resistance) answer in units of m. 1. A golf ball is released from rest from the top of averytall building. Choose a coordinates system whose origin is at thestarting point of the ball, and whose y axis points verticallyupward. The accerelation of gravity is 9.8 m/s2.Neglecting air resistance, calculate the velocity of the ball after2.6 sec .Answer in units of m/s b. What is the position of the ball after 2.6 sec ?(neglect air resistance) answer in units of m.

Explanation / Answer

Neglecting the air resistance and taking the coordinate axisas specified .Then it would be a motion with constant acceleration. Here initial velocity(u) = 0 acceleration (a)= 9.8 m/s2 time (t)= 2.6 sec Using the equation . v=u+at v =0+9.8*2.6 = 25.48 m/s Using the relation v2-u2=2aS 25.482 = 2*9.8*S S= 33.124 m So we can see that air resistance dos play a very importantrole an it decreased the velocity be 5.14 m/s

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