If an object is thrown vertically up with the initial speed u from the ground, then the time taken by the object to return back to the ground is _______.
A. \(\frac{u^{2}}{2 g}\)
B. \(\frac{u^{2}}{g}\)
C. \(\frac { u }{ 2g }\)
D. \(\frac { 2u }{ g }\)
Answer:D
If an object is thrown vertically up with the initial speed u from the ground, then the time taken by the object to return back to the ground is _______.
A. \(\frac{u^{2}}{2 g}\) B. \(\frac{u^{2}}{g}\) C. \(\frac { u }{ 2g }\) D. \(\frac { 2u }{ g }\)