9. A wagon is pulled a distance of 185 m. The task requires 1.20 x 104 ) of work and is done by pulling a rod with a for

[answerhappygod]

9 A Wagon Is Pulled A Distance Of 185 M The Task Requires 1 20 X 104 Of Work And Is Done By Pulling A Rod With A For 1 (54.71 KiB) Viewed 45 times

9. A wagon is pulled a distance of 185 m. The task requires 1.20 x 104 ) of work and is done by pulling a rod with a force of 125 N at an angle. At what angle is the rod held? [1 mark] 10 A 2000w elevator motor operates for 95s to lift an elevator car 5.0m above the ground. Assuming 100% efficiency, what was the mass of the elevator car? [2 marks] 11. In the 1950's, an experimental train that had a mass of 2.50 x 104 kg was powered across a level track by a jet engine that produced a thrust of 5.00 x 105 N for a distance of 5.00 x 10²m. a. Find the work done on the train. [1 mark] b. Find the final speed of the train if the train started from rest (assume no friction). [1 mark] 12 A 60w incandescent light bulb produces 50 of light every second. The rest is converted into heat. How efficient is this light bulb? [1 mark]