Question 15 of18 H E View Policies Current Attempt in Progress Only two forces act on an object [mass = 7.69 kg}. as in the drawing. Find the (a) magnitude and [bl direction [relative to the x axis} of the acceleration of the object. {a} Number I Units V {bl Number l Units V 000 Question 16 of 18 > - /1 View Policies Current Attempt in Progress Two objects (50.0 and 19.0 kg) are connected by a massless string that passes over a massless, frictionless pulley. The pulley hangs from the ceiling. Find (a) the acceleration of the objects and (b) the tension in the string. (a) Number Units (b) Number i UnitsQuestion 17 ONE .r"l E View Policies Current Attempt in Progress A girl is sledding down a slope that is inclined at 30.0" with respect to the horizontal. The wind is aiding the motion by providing a steady force of 122. N that is parallel to the motion of the sled. The combined mass ofthe girl and the sled is 73.1 kg, and the coefcient of kinetic friction between the snow and the runners of the sled is 0.131. How much time is required for the sled to travel down a 156m sloper starting from rest? a Units v Question 18 of18 - H E View Policies Current Attempt in Progress A mountain climber. in the process of crossing between two cliffs by a rope. pauses to rest. She weighs 53"5 N. As the drawing shows. she is closer to the left cliff than to the right cl iff, with the result that the tensions in the left and right sides of the rope are not the same. Find the tensions in the rope to the left and to the right ofthe mountain climber; 65.00 80.00 (2" +1-1