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A woodpecker's brain is specially protected from large decelerations by tendon-like attachments inside the skull. While pecking on a tree, the woodpecker's head comes to a stop from an initial velocity of 0.600 m/s in a distance of only 2.00 mm. (a) Find the acceleration in
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- A woodpecker’s brain is specially protected from large accelerations by tendon-like attachments inside the skull. While pecking on a tree, the woodpecker’s head comes to a stop from an initial velocity of 0.600 m/s in a distance of only 2.00 mm. (a) Find the acceleration in meters per second squared and in multiples of g, where g = 9.80 m/s2. (b) Calculate the stopping time. (c) The tendons cradling the brain stretch, making its stopping distance 4.50 mm (greater than the head and, hence, less acceleration of the brain). What is the brain’s acceleration, expressed in multiples of g?arrow_forwardA woodpecker's brain is specially protected from large decelerations by tendon-like attachments inside the skull. While pecking on a tree, the woodpecker's head comes to a stop from an initial velocity of 0.600 m/s in a distance of only 2.00 mm. (a) Find the acceleration in m/s2 and in multiples of g ⎝g = 9.80 m/s2⎞ (b) Calculate the stopping time. (c) The tendons cradling the brain stretch, making its stopping distance 4.50 mm (greater than the head and, hence, less deceleration of the brain). What is the brain's deceleration, expressed in multiples of g ?arrow_forwardA woodpecker’s brain is specially protected from largedecelerations by tendon-like attachments inside the skull.While pecking on a tree, the woodpecker’s head comes to astop from an initial velocity of 0.600 m/s in a distance of only2.00 mm. (a) Find the acceleration in m/s2and in multiplesof g (g= 9.80m/s2)⎠. (b) Calculate the stopping time. (c)The tendons cradling the brain stretch, making its stoppingdistance 4.50 mm (greater than the head and, hence, lessdeceleration of the brain). What is the brain’s deceleration,expressed in multiples of g ?arrow_forward
- ONLY ROUND OFF ON THE FINAL ANSWER DO NOT ROUND OFF WHILE SOLVINGarrow_forwardA Formula One car is a single-seat racing car with an open cockpit and substantial wings located in the front and rear. At high speeds, the aerodynamics of the car help to create a strong downward force which allows the car to brake from 27.8 m/s (100 km/hr or 62.2 mi/hr) to 0 in as small of a distance as 17 meters. Determine the deceleration rate (i.e., acceleration) achieved by such a car.arrow_forwardColonel John P. Stapp, USAF, participated in studying whether a jet pilot could survive emergency ejection. On March 19, 1954, he rode a rocket-propelled sled that moved down a track at a speed of 632 mi/h. He and the sled were safely brought to rest in 1.40 s. Stapp's face is contorted by the stress of rapid negative Col. John Stapp and his rocket sled are acceleration. (Courtesy of U.S. brought to rest in a very short time interval. Air Force) (a) Determine the negative acceleration he experienced (in m/s). m/s2 (b) Determine the distance he traveled during this negative acceleration (in m). (c) What If? Col. Stapp was able to walk away from this experiment. If the human body can survive a negative acceleration five times that experienced by Col. Stapp, what minimum stopping time (in s) would this correspond to in the 1954 experiment? Sarrow_forward
- An indestructible bullet 2.00 cm long is fired straight through a board that is 10.0 cm thick. The bullet strikes the board with a speed of 470 m/s and emerges with aspeed of 265 m/s. (To simplify, assume that the bullet accelerates only while the front tip is in contact with the wood.) (a) What is the average acceleration of the bullet through the board? m/s2 (b) What is the total time that the bullet is in contact with the board? (Enter the total time for the bullet to completely emerge from the board.)arrow_forwardYou're driving along at 25m/s with your aunt's valuable antiques in the back of your pickup truck when suddenly you see a giant hole in the road 55 m ahead of you. Fortunately, your foot is right beside the brake and your reaction time is zero! If the coefficients of friction are μs =0.6 and uk =0.3, how much time does it take you to stop if you don't want the antiques to slide and be damaged?arrow_forwardA basketball player jumps straight up for a ball. To do this, he lowers his body 0.330 m and then accelerates through this distance by forcefully straightening his legs. This player leaves the floor with a vertical velocity sufficient to carry him 0.920 m above the floor. (a) Calculate his velocity (in m/s) when he leaves the floor. (Enter a number.) m/s (b) Calculate his acceleration (in m/s2) while he is straightening his legs. He goes from zero to the velocity found in part (a) in a distance of 0.330 m. (Enter a number.) m/s² (c) Calculate the force (in N) he exerts on the floor to do this, given that his mass is 102 kg. (Enter a number.) Narrow_forward
- The acceleration of an object is given by a = 3.0 t2 -2.0 t +1.0 (m / s2). Determine the velocity at t = 2.0 s. The initial velocity v0 = 2.0 m / s. (Hint: a = dv / dt or dv = a dt, use the concept of integration)arrow_forwardA 68 kg man drops to a concrete patio from a window 0.45 m above the patio. He neglects to bend his knees on landing, taking 2.4 cm to stop. (a) What is his average acceleration from when his feet first touch the patio to when he stops?(b) What is the magnitude of the average stopping force exerted on him by the patio?arrow_forwardThe head injury criterion (HIC) is used to assess the likelihood of head injuries arising from various types of collisions; an HIC greater than about 1000 s is likely to result in severe injuries or even death. The criterion can be written as HIC=(aavg/g)^2.5Δt, where aavg is the average acceleration during the time Δt that the head is being accelerated, and g is the free-fall acceleration. The figure shows a simplified graph of the net force on a crash dummy's 4.5 kg head as it hits the airbag during a automobile collision. What is the HIC in this collision? Give your answer in seconds.arrow_forward
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill