posted by precious .
A lorry of mass 1000kg moving initially at 10m/s increases to 25m/s. In 5sec the on the lorry is 15,000Newtons; calculate:
(b) The distance covered
You left out some words here:
"in 5 sec the on the lorry is 15,000 Newtons. "
Is 5 seconds the time requred to accelerate from 10 to 25 m/s? If so, there are two ways to calculate acceleration, and they do not agree.