A projectile enters a resisting medium at x ? 0 with an initial velocityv0 ? 900 ft/s and travels 4 in

Civil Engineering Jan 19, 2021

A projectile enters a resisting medium at x ? 0 with an initial velocityv0 ? 900 ft/s and travels 4 in. before coming to rest. Assuming that thevelocity of the projectile is defined by the relation 0 v ? v ? kx, where v isexpressed in ft/s and x is in feet, determine (a) the initial acceleration ofthe projectile, (b) the time required for the projectile to penetrate 3.9 in.into the resisting medium.