Question 5 of 18 0.55 H E View Policies Show Attempt History Current Attempt in Progress I I : Your answer Is partially correct. '_ ____________________________________________________________________________________________ I > b ' Two forces FA and F3 are applied to an object whose mass is 19.9 kg. The largerforce is FAA When both forces point clue east, the ' > object's acceleration has a magnitude of 0.772 m/sz. However. when FA points due east and F3 points due west, the acceleration is 0.682 mrs2, due east. Find la} the magnitude of: and {h} the magnitude of F.;. {a} Number 14.5 Units {bl Number i 0.86 Units Question 12 of13 _ H E View Policies Current Attempt in Progress A neutron star has a mass of 2.0 x 1030 kg [about the mass ofour sun] and a radius of 5.0 x 103 m (about the height ofa goodsized mountain). Suppose an object falls from rest near the surface of such a star. How fast would this object be moving after it had fallen a distance of 0.013 m? {Assume that the gravitational force is constant over the distance of the fall and that the star is not rotating.) v = a mis V 0.0 Question 13 of 18 - /1 View Policies Current Attempt in Progress A block is pressed against a vertical wall by a force F , as the drawing shows. This force can either push the block upward at a constant velocity or allow it to slide downward at a constant velocity. The magnitude of the force is different in the two cases, while the directional angle 0 is the same. Kinetic friction exists between the block and the wall, and the coefficient of kinetic friction is 0.300. The weight of the block is 48.0 N, and the directional angle for the force F is 0 = 43.0% Determine the magnitude of F when the block slides (a) up the wall and (b) down the wall. (a) P = i (b) P = HIQuestion 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