A projectile of mass 4kg is fired vertically and reaches a maximum height of 40m. Calculate the potential energy at the highest point
(g = 10ms\(^{-2}\)
The length of the seconds hand of laboratory clock is 0.1m. Calculate the speed at the top of the seconds hand
Workdone on an object to bring it to a certain point in space is called
A copper rod, 5m long when heated through 10c, expands by 1mm. If a second copper rod, 2.5m long is heated through 5c, by how much will it expand?
A safety precaution designed to prolong the life of a lead acid accumulator is
