$2$

JUNE $2024$

CEF$2601$

MAJOR ASSESSMENT $1$

QUESTION $3$

A crane lifts a $5,000kg$ concrete slab to a height of $20$ meters at a constant velocity. During the process, $50kJ$ of heat is generated due to friction between the crane and the slab.

$3\mathrm{.}1$ Calculate the change in potential energy of the concrete slab.

$(5)$

$3\mathrm{.}2$ Calculate the change in kinetic energy of the concrete slab.

$(4)$

$3\mathrm{.}3$ Calculate the total energy change using the energy balance equation.

$(7)$

$[16$ MARKS$]$