If we drop an object, it's initial velocity is zero. How far will it fall in time 't'?
Correct answer: B. 4.9 t2
- A. 9.8 t2
- B. 4.9 t2
- C. 0.49 t2
- D. 98 t2
Explanation
Free fall is a motion of a body in which the only force acting of the body is the Gravitational Force. In this motion body moves with constant acceleration i.e acceleration due to gravity.When an object is thrown downward from a non zero height say h the motion is referred to as free fall with initial velocity of object beign zero.Hence v = 0By using the kinematics straight line motion formula : s= u +½ at2 s= 0 + ½ x 9.8x t2 s= 4.9 t2
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