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Q1. A rock is projected from the edge of the top of a building with an initial velocity of 14 m/s at an angle of 36 above the horizontal. The rock strikes the ground a horizontal distance of 44 m from the base of the building. Assume that the ground is level and that the side of the building is vertical. How long did the rock take to hit the ground? Give your answer in seconds to two decimal places. Hint: Look at the horizontal components of the motion.
Q2. A hollow aluminium cylinder 16.0 cm deep has an internal capacity of 2.000 L at 17.0°C. It is completely filled with turpentine at 17.0°C. The turpentine and the aluminum cylinder are then slowly warmed together to 67.0°C. (The average linear expansion coefficient for aluminum is 2.4 10-5°C-1, and the average volume expansion coefficient for turpentine is 9.0 10-4°C-1.)
(a) How much turpentine overflows?
(b) What is the volume of turpentine remaining in cylinder at 69.0°C?
(c) If the combination with this amount of turpentine is then cooled back to 19.0°C, how distant below the cylinder's rim does the turpentine's surface recede?
a block of mass m = 2.50 kg is pushed a distance of d = 2.20 m along a frictionless horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle of 25.0 degrees below the horizontal
Unpolarized light is incident on a system of three polarizers. The second polarizer is oriented at an angle of 30 degrees with repect to the first, what is the intensity of the incident light
A refrigerator uses an ideal Carnot cycle to cool its interior. The outside air has a temperature of 302 K and the refrigerator is kept at a temperature of 276 K. find the coefficient of performance of this refrigerator
A 83.55kg woman walked a 5k race in 53.33 minutes. How much power did it take to complete the race
A uniform plank of length 5 m and weight 231 N rests horizontally on two supports, with d = 1.43 m of the plank hanging over the right support. To what distance, x, can a person who weighs 446 N walk on the overhanging part of the plank before it ..
A 65 kg hiker has fallen down a hole. One rescuer attaches a rope to the injured hiker and then a second rescuer pulls the injured hiker straight up out of the hole at a steady rate. How much force would the second rescuer need to exert on the rope t..
A 194 N force is needed to slide a box across a flat surface at a constant velocity. What is the coefficient of kinetic friction between the box and the floor. (Use g = 9.8 m/s2.)
A net force of 36N accelerates a 5.1-kg mass over a distance of 12 m. What is the increase in kinetic energy of the mass
A meter stick lies on the bottom of a 100 cm long tank with its zero mark against the left edge. You look into the tank at a 30 angle, with your line of sight just grazing the upper left edge of the tank.
A heat engine produces 9440 J. of heat while performing 2340 J. of useful work. What is the percent efficiency of this engine
A dragster accelerates to a speed of 100 m/s over a distance of 398 m. Determine the acceleration (assume uniform) of the dragster
Pool players often pride themselves on their ability to impart a large speed on a pool ball. At what speed did his pool ball hit the ground
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