22. A 92.0-kg skydiver with an open parachute falls straight downward through a vertical height of 325 m. The skydiver's velocity remains con- stant. What is the work done by the nonconscrvative force of air resistance, which is the only nonconservative force acting? (a) – 2.93 × 10ʻ J (b) 0 J (c) +2.93 × 10° J (d) The answer is not obtainable, because insufficient information about the skydiver's speed is given.

22. A 92.0-kg skydiver with an open parachute falls straight downward through a vertical height of 325 m. The skydiver's velocity remains con- stant. What is the work done by the nonconscrvative force of air resistance, which is the only nonconservative force acting? (a) – 2.93 × 10ʻ J (b) 0 J (c) +2.93 × 10° J (d) The answer is not obtainable, because insufficient information about the skydiver's speed is given.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

4
A block of mass = 5.5 kg slides up over a wall by the action of a inclined force F. The block starts from rest, when it travels 2 m, its speed is 0.4 m/s. the kinetic coefficent of friction is 0.25. (g = 10 m/s2 ), find the work done by the friction force in Joules.
1) A block of mass m 0.5 kg is pushed up a vertical wall by a force F of magnitude 10 N, as shown. The coefficient of kinetic friction between the block and the wall is uk. The block is accelerating vertically upward at a rate of 2 m/s. a) Find the coefficient of kinetic friction, Hk. b) If the block moves upward 4 meters, find the net work done by all forces acting on the block. (g-10 m/s) (37
A 58.1-kg skateboarder starts out with a speed of 2.03 m/s. He does 108 J of work on himself by pushing with his feet against the ground. In addition, friction does -243 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the skateboarder is 7.89 m/s. (a) Calculate the change (PEf - PE0) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Give the absolute value.
Problem 2: Suppose the ski patrol lowers a rescue sled carrying an injured skiier, with a combined mass of 97.5 kg, down a 60.0° slope at constant speed, as shown in the Figure. The coefficient of kinetic friction between the sled and the snow is 0.100. 60° ©theexpertta.com Part (a) How much work, in joules, is done by friction as the sled moves 30.5 m along the hill? W; = - 1458.6 W; = -1459 vCorrect! Part (b) How much work, in joules, is done by the rope on the sled over this distance? W, = 2.38 * 104 W, = 23800 X Feedback: is available. Part (c) What is the work, in joules, done by the gravitational force on the sled? W, = 2.53 * 104 W. = 25300 / Correct! Part (d) What is the net work done on the sled, in joules? Wnet = sin() cos() tan() 7 8 9 HOME cotan() asin() acos() E 4 5 6 atan() acotan() sinh() 1 2 3 cosh() ODegrees O Radians tanh() cotanh() END VOl BACKSPACE DEL CLEAR Submit Hint Feedback I give up!
6. One end of a light inextensible string is attached to a block. The string is used to pull the block along a horizontal surface with a speed of 2 m s−1. The string makes an angle of 20° with the horizontal and the tension in the string is 25 N. Find the work done by the tension in a period of 8 seconds.
A 12.0 kg box is given an initial push that starts it sliding across the floor. It eventually comes to a stop. If the box has an initial velocity of 3.5 m/s, how much work is done by friction to cause it to come to a stop? (Yes, you are correct, you do not know the coefficient of friction.)
A horizontal force of 12 N is applied to a 4.0 kg box that slides on a horizontal surface. The box starts from rest, moves a horizontal distance of 10 meters, and obtains a velocity of 5.0 m/s. The surface has friction. (a) Calculate the frictional force. (b) Calculate the work done by friction.
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.
1. After hitting a long fly ball that goes over the right fielder's head and lands in the outfield, the battler decides to keep going past second base and try for third base. The 62.0-kg player begins sliding 3.4om from the base with a of 4.35m/s.If the player comes to rest at third base, (a) How much work was done on the player by friction?(b) What as the coefficient of kinetic friction between the player and the ground? Draw and explain.
A man returning from ice fishing trip pulls a sled with fish. Total mass of the sled and fish is 50.0 kg. (b) Suppose the coefficient of kinetic friction between sled and snow is 0.20. The man pulls the sled 5.0 m by exerting a force of 120 N at 0°. Find the work done by force of frictional.
103.