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ffQuestion 8 (Mandatory) (1 point) A 1500-kg elevator moves upward with constant speed through a vertical distance of 25 m. How much work was done
\f\fQuestion 8 (Mandatory) (1 point) A 1500-kg elevator moves upward with constant speed through a vertical distance of 25 m. How much work was done by the tension in the cable? Rounded to two sig digs: a) 140 000 J O b) 370 000 J O c) 990 J O d) 8100 J O e) 430 000 J Question 9 (Mandatory) (1 point) A pebble 0.02 kg rolls off the roof of Science Hall and falls vertically. Just before it reaches the ground, the pebble's speed is 17 m/s. Neglect air resistance and determine the height of Science Hall. Rounded answer. O a) 42 m b) 21 m O c) 15 m O d) 26 m\f
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