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* Equation Jeopardy 3 The equation below describes one or more physical processes. Solve the equation for the unknown and write a problem statement for which the equation is a satisfactory solution.
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College Physics: Explore And Apply, Volume 2 (2nd Edition)
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- A suspicious physics student watches a stunt performed at an ice show. In the stunt, a performer shoots an arrow into a bale of hay (Fig. P11.24). Another performer rides on the bale of hay like a cowboy. After the arrow enters the bale, the balearrow system slides roughly 5 m along the ice. Estimate the initial speed of the arrow. Is there a trick to this stunt? FIGURE P11.24arrow_forwardFebruary 3, 2009, was a very snowy day along Interstate 69 just outside of Indianapolis, Indiana. As a result of the slippery conditions and low visibility (50 yards or less), there was an enormous accident involving approximately 30 vehicles, including cars, tractor-trailers, and even a fire truck. Many witnesses said that people were driving too fast for the conditions and were too close together. In this problem, we explore two rules of thumb for driving in such conditions. The first is to drive at a speed that is half of what it would be in ideal conditions. The other is the 8-second rule: Watch the vehicle in front of you as it passes some object such as a street sign, and you should pass that same object 8 seconds later. On a dry road, the 8-second rule is replaced by a 3-second rule. a. Assume vehicles on a slippery interstate highway follow both rules. What is the distance between the vehicles? b. If a driver followed the first rule of thumb, driving at a lower speed, but used the 3-second rule instead of the 8-second rule, what is the distance between the vehicles? How does that distance compare with the visibility on the day of the accident? c. Suppose drivers do not follow either rule of thumb for slippery conditions. What is the distance between vehicles? How does that distance compare with the visibility on that day? d. Suppose a driver was not obeying either rule of thumb when she sees a tractor-trailer that stopped on the highway. She presses on her brakes, locking the wheels, and her car crashes into the truck. Estimate the magnitude of the impulse exerted on her car. e. Estimate the impulse on the car in part (d) had the driver followed both rules of thumb for slippery conditions instead of ignoring them.arrow_forwardRank the following quantities of energy from largest to smallest. State if any are equal. (a) the absolute value of the average potential energy of the SunEarth system (b) the average kinetic energy of the Earth in its orbital motion relative to the Sun (c) the absolute value of the total energy of the SunEarth systemarrow_forward
- Some physical quantity X has the following units: M-9 L-5 T7. Some physical quantity Y has the following units: M6 L3 T-2. X and Y are related by an equation Y2 = c X-9, where c is some constant. The units of c can be written as Ma Lb Tc. What is a?arrow_forwardYou are given the following equations and corresponding data. In each case solve for the stated quantity. (a) (M. c. + M c) S = VI solve for c. V = 12.00 + 0.05 V I= 2.17+0.05 A M = 125+1 g %3D c = 390+0.53 J/Kg K M, = 75+1 g S= (7.18+0.02) x10 K/s (b) z =v (x y + w') solve for z v = (0.644 + 0.004) m x = (3.42 + 0.06) m y = (5.0 ± 0.12) m, w = (12.13 + 0.08)marrow_forwardYou are an engineer and asked to design a slide in the park. The qualification for the said slide is that the person's speed at the bottom of the slide should not be more than 7 m/s. Determine the maximum height of the slide that you can design. A 1.8 m 3.2 m C) 2.5 m D) 2.2 marrow_forward
- fill out the table. include solution and short explanation on how did you come up with the answer. attached picture for reference Time (s) PE (J) KE (J) Total (PE+KE J) Change in PE (J) Change in KE (J) 0 768.32 0 768.32 1 720.3 48.02 768.32 2 576.24 192.08 768.32 3 336.14 432.18 768.32 4 0 768.32 768.32arrow_forwardThe total consumption of electrical energy in the United States is about 1.0×10^19 joules per year Part A Express this rate in watts. Part B Express this rate in kilowatts. Express your answer in kilowatts. Part C If the U.S. population is about 320 million people, what is the average rate of electrical energy consumption per person? Express your answer in kilowatts per person.arrow_forwardUse the formula for „P, to solve the following question. A club with sixteen members is to choose three officers: president, vice-president, and secretary-treasurer. If each office is to be held by one person and no person can hold more than one office, in how many ways can those offices be filled? ways Enter your answer in the answer box. Us / 23 MacBook Air 80 F3 II F8 F2 F5 F6 F9 F10 F11 F12 @ #3 %24 4 ! & * 1 2 3 7 9. R Y U P. } A F H. V. M alt tion command corhmand option + I| * cOarrow_forward
- A 2000 kg car traveling at a speed of 16 m/s skids to a halt on wet concrete where k = 0.30. For the steps and strategies involved in solving a similar problem, you may view a Video Tutor Solution. Part A How long are the skid marks? Express your answer in meters. L = Submit 15. ΑΣΦ Review I Constants I Periodic Table Provide Feedback Request Answer ? m Next >arrow_forwardWhich of the following statement is incorrect? A. î x j = k B. k • j = î C.ĵ · j = 1 D. k × k = 0 A А) А В) в с) с D) D E No Answerarrow_forward3. DETAILS n mq MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You are working with a movie director and investigating a scene with a cowboy sliding off a tree limb and falling onto the saddle of a moving horse. The distance of the fall is several meters, and the calculation shows a high probability of injury to the cowboy from the stunt. Let's look at a simpler situation. Suppose the director asks you to have the cowboy step off a platform 2.95 m off the ground and land on his feet on the ground. The cowboy keeps his legs straight as he falls, but then bends at the knees as soon as he touches the ground. This allows the center of mass of his body to move through a distance of 0.660 m before his body comes to rest. (Center of mass will be formally defined in Linear Momentum and Collisions.) You assume this motion to be under constant acceleration of the center of mass of his body. To assess the degree of danger to the cowboy in this stunt, you wish to calculate the average force upward on…arrow_forward
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