the force that acted upon the body in for it to begin moving is represented by the equation: F = ma where F isis force, m is mass, and a is acceleration. we know the mass is 4 kg. we know the speed and the amount of time it took to get that speed. the amount of time it takes to reach a speed is acceleration. the equation for this is a = (delta v) / t a is acceleration. delta v is change in velocity. t is time. So a =(8 - 0 ) / 2 a = 4 F =4 * 4 F = 16 N
Starting from rest, a 4.0-kg body reaches a speed of 8.0 m/s in 2.0 s. what is the net force acting on the body?