How do force and mass change acceleration?

A push can change a cart’s speed. The same push changes a light cart’s speed more quickly than a heavy cart’s. A stronger push can make the heavy cart gain speed faster. This change in speed each second is acceleration. Divide the net push by the cart mass to calculate it. Newton’s second law gives a = Fnet ÷ m for constant mass. A two-kilogram cart with a four-newton net force accelerates at two metres per second squared. The velocity grows steadily under that constant force, while displacement grows more quickly because the cart covers more ground each second.