An object whose mass is 100 gm starts from rest and moves with constant acceleration of 20 cm sec2 at the end 8 sec its momentum is in gm. cm /sec

Explanation

To find the momentum, we first calculate the velocity of the object at the end of 8 seconds using the formula: velocity = initial velocity + (acceleration × time). Since the object starts from rest, the initial velocity is 0. Therefore, velocity = 0 + (20 cm/s² × 8 s) = 160 cm/s. The momentum is then calculated using the formula: momentum = mass × velocity. Here, the mass is 100 g and the velocity is 160 cm/s, thus the momentum = 100 g × 160 cm/s = 16000 g·cm/s. Other options are incorrect due to errors in calculating velocity or improperly applying the momentum formula.