Question:

A wrecking crane lifts a 1400-kg wrecking ball straight up with a constant acceleration of 1.5 m/s2 using a 25-m long steel cable that is 2.5 cm in diameter. Young’s modulus for this steel is 1.9 × 1011 N/m2. What is the change in length of the cable caused by lifting the ball? A.4.9 cm B.4.9 m C.8.4 cm D.4.9 mm E.4.2 mm