## Physics (10th Edition)

2.5 $\times$ $10^{7}$ J
Work done by catapault = total work done on jet - work done by thrust engine = 4.5 $\times$ $10^{7}$ - 2.3 $\times$ $10^{5}$ $\times$ 87 $\approx$ 2.5 $\times$ $10^{7}$ J