13. During a workout, football players ran up the stadium stairs in 75 s. The distance along the stairs is 83 m and they are inclined at a 33° angle. If a player has a mass of 82 kg, estimate his average power output on the way up. Ignore friction and air resistance.
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Q: 1. If the force has a magnitude Fp = 20 N and makes an angle of 30° to the ground. Calculate the…
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Q: Paraaadiip
A: Number: 2419.372 Units: WExplanation:
Q: A 2400-kg pile driver is used to drive a steel beam Into the ground. The pile driver falls 6.00 m…
A: mass of pile driver (m) = 2400 kg Height of pile driver before coming in contact with top of beam…
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A: The work done by the system on the sled is W=700.76 J
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A: Ans:- Image-1
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- Calculate the average power necessary for a 55.8 kg person to run up a 5.0 m high, sloped hill, in 3.00 s.how much power in watts is required to accelerate a 1200 kg car from rest to 16 m/s in 8 seconds against a constant air resistance of 350 N2. Three blocks with masses m1 = 4.31 kg, m2 = 8.73 kg, and m3 = 17.2 kg, respectively, are attached by massless strings over pulleys without friction, as indicated in the Figure. The horizontal surface exerts a force of friction of 12.5 N on m2. If the system is released from rest, use energy concepts to find the speed of m3, after it moves down by 3.25 m.
- 30.Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 60.0° slope at constant speed, as shown below. The coefficient of friction between the sled and the snow is 0.100. (a) How much work is done by friction as the sled moves 30.0 m along the hill? (b) How much work is done by the rope on the sled in this distance? (c) What is the work done by the gravitational force on the sled? (d) What is the total work done? 60° W T11. A person pushes a m = 2.60 kg carton a distance d = 4.20 m along the floor by a constant force of magnitude F = 16.0 N directed at an angle 0 = 30.0° below the horizontal as shown in the figure. Assume the floor is frictionless. (a) Determine the work done on the carton by the applied force (the force on the carton exerted by the person). (b) Determine the work done on the carton by the normal force exerted by the floor. (c)Determine the work done on the carton by the gravitational force. (d)Determine the work done by the net force on the carton. mA 660kg car is moving with an initial speed of 10.0 m/s. A deer jumps into the road and the driver slams on his brakes, honks the cars horn, and says a prayer silently as he swears out loud. The car comes to a screeching halt after 4.00 seconds, just inched from the deer, which then nonchalantly proceeds to cross the road and get hit by a dump truck coming from the opposite direction. What average power is used to stop the car in watts?
- 9. A man pushes an 80-N crate up a frictionless slope that makes an angle of 30° with the horizontal. The man was able to push it to a distance of 5.0Om along the slope with a force parallel also to the slope. However the speed of the crate decreases at a rate of 1.5 m/s?. The work being done by the man is: A. -200 J В. 61J С. 140 J D. 200 J 14. A 6.0-kg block is released from rest 80 m above the ground. When it has fallen 60 m its kinetic energy is approximately: A. 4800 J В. 3500J C. 1200 J D. 120 J9. A person pulls a crate across a floor using a rope. They pull on the rope with a force of 95 N at an angle of 35°, and they move the box a distance of 11 m. How much work did they do? e CODE===4 F cos 0= F1) A child pulls on a wagon with a force of 75 N. If the wagon moves a total of 42 m in 3.1 minutes, what is the average power delivered by the child?
- 5. A person pulls an object of mass 40 kg as far as 20 m above a flat floor at a constant speed. The force used is directed 370 upwards horizontally. The coefficient of kinetic friction of the object with the floor is 0.20. Determine the work by the person, the work by the frictional force, and the total work on the object.Multiple-Concept Example 13 presents useful background for this problem. The cheetah is one of the fastest accelerating animals, for it can go from rest to 31.8 m/s in 3.38 s. If its mass is 119 kg, determine the average power developed by the cheetah during the acceleration phase of its motion. Express your answer in (a) watts and (b) horsepower. (a) Number i (b) Number Units UnitsAn advertisement claims that a(n) 1600 kg car can accelerate from rest to 26 m/s in 8.4 s. Given: Unit conversion: 746 W/hp. What average power must the motor pro- duce to cause this acceleration, if we ignore friction and air resistance? Answer in units of hp. Answer in units of hp. Your response... PALETTE