A crate of mass 50kg is pulled on a smooth horizontal floor by two ropes. One rope pulls toward the east with a force of 120N, while the other pulls toward the west with a force of 80N. Find the magnitude and direction of the crate's acceleration.
(a) 0.8ms−2 west
(b) 1.6ms−2 west
(c) 0.8ms−2 east
(d) 2.4ms−2 east