find the force required to give a mass of 70kg an acceleration of 4m/sec2 horizontally and vertically.

let vertical direction be y and horizontal direction be x.

thus acceleration a = (4i + 4j) m/s²

mass, m = 70 kg

thus force = F = ma = 280(i+j) m/s²

it will make ann angle of 45 degree with each axis (as it has equal component in each direction )

and magnitude =