1. A ship is being pulled by two locomotives through a 1.89 km canal. The tension in each cable is 7.07 x 10³N andangle between the cable and the horizontal line is 27.0^o. What is the work done, in kJ, on the boat by the locomotives?

2. 5.87 x 10²N force, acting at 26.1^oabove the surface, is pulling on an 87.1 kg refrigerator across a horizontal floor. The frictional force opposing the motion is 1.72 x 10²N and the refrigerator is moved a distance of 1.49 m. Find the work done, in kJ, by the friction force.

3. A roller coaster starting at point A, the heights point, at a height of 35.9 m from the ground level, the moves to point B, the ground level and then goes up at point C at a height of 22.3 m and then slows down at point D that is 14.8 m from the ground level.Through the roller coaster there is no friction, but when it reaches point D there is a horizontal platform of length 16.3 m that has friction that causes the roller coaster to stop. How much acceleration from friction is required to stop the roller coaster along this length, assuming it has a speed of 1.72 m/s at point A?

4. A 71.3 kg diver steps off a 21.8 m tower and drops, from rest, straight down into the water. If he comes to rest 4.3 m beneath the surface, determine the average resistive force exerted on him by the water, in kN.

5. attachment below

'- dltcssd.ab.ca m Quizzes - 2122-012-Physics 20-43188[QS-PM-SAACO... a -> Question 1 Retaken 0 / 1 point Given the following force-displacement graph, determine the work done during the time interval d1: 3.8 m to d2= 8.1 5. :zio x4.0 i6.0|8.0l10.012014.l;16.0 thlaoemomm) Record your answer to one digit after the decimal point. No units Answer: 0 / 1 point -D Question 2 Retaken Given the following force-diSplacement graph, determine the work done during the time interval d1: 20 m to d2= 6.5 m. Force (N) Displacement (m) Record your answer to one digit after the decimal point. No units