A 84 kg skydiver can be modeled as a rectangular "box" with dimensions 24 cm x 35 cm x 180 cm. If he falls feet first, his drag coefficient is 0.80. ▼ Part A What is his terminal speed if he falls feet first? Use p = 1.2 kg/m³ for the density of air at room temperature. Express your answer with the appropriate units. ▸ View Available Hint(s) Value Submit Units ?

A 84 kg skydiver can be modeled as a rectangular "box" with dimensions 24 cm x 35 cm x 180 cm. If he falls feet first, his drag coefficient is 0.80. ▼ Part A What is his terminal speed if he falls feet first? Use p = 1.2 kg/m³ for the density of air at room temperature. Express your answer with the appropriate units. ▸ View Available Hint(s) Value Submit Units ?

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)...

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A block of mass m is placed on the right side of a cart; the cart and the block are accelerating to the right with acceleration a, and the coefficient of static friction between the cart and the block is µs. The system is sketched below. a Explain qualitatively why the block won't slip and fall if the acceleration of the cart is large enough.
It is friction that provides the force for a car to accelerate, so for high-performance cars the factor that limits acceleration isn't the engine; it's the tires. For the steps and strategies involved in solving a similar problem, you may view a Video Tutor Solution. Part A For typical rubber-on-concrete friction, what is the shortest time in which a car could accelerate from 0 to 50 mph? Suppose that us = 1.00 and k = 0.80. Express your answer with the appropriate units. 20 Submit μA Δt = |11.404 S Previous Answers Request Answer ? Review | Constants | Periodic Table X Incorrect; Try Again; 4 attempts remaining 7:54 PM
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C. Problem Solving. 1. A block of copper with mass 15 kg is sitting on an incline that has an angle of 25° above horizontal. What is the normal force on the block of copper? 2. A block with a mass of m = 1.5 kg, being pushed across a horizontal glass surface, µx = 0.4. What is the value of the kinetic friction, Fx ? 3. A 75 kg block is pulled along the floor with a horizontal force of 100 N at a constant velocity. What is the coefficient of sliding friction between the block and the floor? 4. An 81-kg basketball player slides into the second base. The coefficient of kinetic friction between the player and the ground is 0.49. What is the magnitude of the frictional force?
A stockroom worker pushes a box with mass 10.8 kg on a horizontal surface with a constant speed of 3.50 m/s. The coefficients of kinetic and static friction between the box and the surface are 0.220 and 0.530, respectively. For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Delivering the goods. Part A What horizontal force must the worker apply to maintain the motion of the box? Express your answer in newtons. Assume that + direction coincides with the direction of velocity. ► View Available Hint(s) F₂ = 23.3 N Submit Previous Answers ✓ Correct Part B If the worker stops pushing, what will be the acceleration of the box? Express your answer in meters per second squared. Assume that +z direction coincides with the direction of velocity. ▾ View Available Hint(s) Hint 1. How to approach the problem In Part A, you would have found an expression for the motion of the box in the horizontal direction using Newton's second law. In…
A 2.6 kg block is attached to a horizontal rope that exerts a variable force Fx = (20 – 5x) N, where x is in m. The coefficient of kinetic friction between the block and the floor is 0.25. Initially the block is at rest at x = 0 m. Part A What is the block's speed when it has been pulled to x = 0.80 m? V = μĂ Value m S ?
Problem 6.33 Part A Above what speed does a 2.5-mm-diameter ball bearing in 20° C water experience quadratic drag? Express your answer with the appropriate units. Uwater = Value Submit Request Answer Part B μÃ Vair = ☐☐ μÀ Value Below what speed does a 2.5-mm-diameter ball bearing in 20°C air experience linear drag? Express your answer with the appropriate units. Units Submit Request Answer P Units input for part A Units ? ?
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Two ice skaters, with masses of 36.0 kg and 75.0 kg, are at the center of a 40.0 m diameter circular rink. The skaters push off against each other and glide to opposite edges of the rink. Part A If the heavier skater reaches the edge in 20.0 s , how long does the lighter skater take to reach the edge? ΑΣΦ Submit Request Answer
A 1800 kgkg car starts from rest and drives around a flat 50-mm-diameter circular track. The forward force provided by the car's drive wheels is a constant 1000 NN . Part A What is the magnitude of the car's acceleration at t=13st=13s? Express your answer to two significant figures and include the appropriate units. aa =