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- FIGURE 9 Figure 9 shows a weight, w pounds (Ib), sliding down an inclined plane which makes an angle a with the horizontal. Assume that no force other than gravity is acting on the weight; that is, there is no friction, no air resistance, and so on. At time t= 0, let x = x, and let the initial velocity be vo. Determine x for t > 0. 5.ents Once I went skiing. I was at the bottom of a snow ramp with a speed of 14.0 m/s. Assuming that the coefficient of friction between the snow and the skis was 0.2 determine my speed at the top of the ramp. The angle theta with the horizontal was 25°. The rise of the snow ramp was h=3.5 meters high. h Skier Met < Previous OL 1A monkey is chained to a stake in the ground. The stake is 3.00 m from a vertical pole, and the chain is 4.11 m long. How high can the monkey climb up the pole? d
- We often think of friction and air resistance as forces that we want to minimize because they can hinder the motion of an object. But they are not always undesirable, and in fact, can be an essential element in a machine or process. Identify one or two applications that depend on friction and air resistance. Explain how friction or air resistance works in those situations and what would happen if there were no friction or air resistance. Your initial post should be 75-150 words in length and is due on Sunday.14. A 25.0 kg girl goes down a slide at an amusement park, reaching the bottom. The slide is 10.0m long and the top end is 3.00m above the ground, bottom is 0.30m above the ground. The coefficient of friction between the girl and the slide is 0.150. What velocity will she exit, at the bottom of the slide. Draw a FBD, explain what you are doing h₁A 150-g baseball is dropped from a tree 15.0 m above the ground. a.)With what speed would it hit the ground if air resistance could be ignored? Express your answer to three significant figures and include the appropriate units. b.)If it actually hits the ground with a speed of 8.00 m/s, what is the magnitude of the average force of air resistance exerted on it? Express your answer to three significant figures and include the appropriate units.
- An object with a mass of 1.76 kg is initially at rest upon a horizontal, frictionless surface. An applied force of 3.04 N i acts on the object for 2.08 s. What is the object's final speed? Enter a number rounded to 2 decimal places and assume the answer has proper SI Units.9. Consider the falling object of mass 10 kg in Example 2, but assume now that the drag force is proportional to the square of the velocity. a. If the limiting velocity is 49 m/s (the same as in Example 2), show that the equation of motion can be written as 1 (49² - 1²). 245 dy dt Also see Problem 21 of Section 1.1. b. If y(0) = 0, find an expression for v(t) at any time. Gc. Plot your solution from part b and the solution (26) from Example 2 on the same axes. d. Based on your plots in part c, compare the effect of a quadratic drag force with that of a linear drag force. e. Find the distance x(t) that the object falls in time t. Nf. Find the time T it takes the object to fall 300 m.3. A skier of mass m starts from rest at the top of a frictionless, snow covered hill angled at 0 above the horizontal. The ski down the hill a distance du and onto a flat parking lot. The coefficient of friction between the cement in the parking lot and the skis is μk. They move along the parking lot a distance dR before stopping. This is drawn below a. Derive an equation for the skier's speed at the bottom of the hill.. b. Derive an equation for dr, the distance the skier slides into the parking lot before stopping. c. If there was a little friction between the snow and skies, explain how your solution would change. You should not re-solve the problem, just describe how your methods would need to change. dH e dR
- At an accident scene on a level road, investigators measure a car's skid mark to be 88 m long. It was a rainy day and the coefficient of friction was estimated to be 0.35. a.)Use these data to determine the speed of the car when the driver slammed on (and locked) the brakes. Express your answer to two significant figures and include the appropriate units.A and B machine parts which are have m-5 kg mass each are connected. The rod dimensions are 253 mm for OA and 250 mm for rod AB. If A is released from rest at this position, please calculate its velocity VA when it crosses red point in the centerline. Friction is neglected. 60° AStep by step work starting with the formula. Q1. Find the net force on an object of mass 30 kg that is falling in air and experiences a force due to air resistance of 50 newtons. Q2. A tiny particle of mass 4 x 10-4 kg (so fdrag = bv) has a drag coefficient, b = 3.3 x 10-2 kg/sec. What is this particle's terminal velocity? At terminal velocity, bvterm = mg, where b is the drag coefficient, m is the mass, v is the terminal velocity and g is the acceleration due to gravity.