The deceleration of the mass center G of a car during a crash test is measured by an accelerometer with the results shown, where the distance x moved by G after impact is 0.8 m. Obtain a close approximation to the impact velocity v from the data given. Deceleration 10g 8g 6g 4g 2g 0 0.2 0.4 x, m 0.6 0.8

The deceleration of the mass center G of a car during a crash test is measured by an accelerometer with the results shown, where the distance x moved by G after impact is 0.8 m. Obtain a close approximation to the impact velocity v from the data given. Deceleration 10g 8g 6g 4g 2g 0 0.2 0.4 x, m 0.6 0.8

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.18P: The drag on an airplane wing in flight is known to be a function of the density of air (), the...

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The deceleration of the mass center G of a car during a crash test is measured by an accelerometer with the results shown, where the distance x moved by G after impact is 0.8 m. Obtain a close approximation to the impact velocity v from the data given. Deceleration 10g 8g 6g 4g 0 Answer: v= i 0.2 G 0.4 x, m 0.6 0.8 km/h
(b) A new prototype rocket engine test shows that the distance covered by a rocket from t=8 sec to t= 30 sec is given by - 16 140000 (140000-2100r 2000 In 101)-9.81 ) di Comparing two and three points Gauss Quadrature, investigate which method gives the highest accuracy (in terms of relative error) in predicting the distance covered by a rocket from t = 8 sec to t = 30 sec.
3. Your engineering firm has been asked to determine the deceleration of a car during hard braking. To do so, you decide to measure the lengths of the skid marks when stopping from various initial speeds. Your data are as follows: Skid length (m) Speed (m/s) 10 7 15 14 20 27 25 37 30 58 a. Do the data support an assertion that the deceleration is constant, independent of speed? Explain? b. Determine an experimental value for the car's deceleration- that is, the absolute value of the acceleration Your analysis method should involve fitting a straight line to an appropriate graph.
Data has been gathered from a lifting system used to transport engine parts. The system consists of a drum and cable. The following data was obtained when the drum lowers the load (assume constant acceleration). Drum diameter = 0.8m Mass of load = 3kg Initial velocitv = 0 m/s Time to descend = A secs 2. ( Distance travelled = 0.25m You have been asked to use this information to determine with 4 s.f. accuracy: Drum Cable a) The final linear velocity of the load b) The linear acceleration of the load Load c) The final angular velocity of the drum d) The angular acceleration of the drum e) The tension force in the cable f) The torque applied to the drum In determining the above quantities, you should clearly state the formulae used and apply dimensional analysis techniques to show that all values/units used are homogeneous.
The "spring-like effect" in a golf club could be determined by measuring the coeffi cient of restitution (the ratio of the outbound velocity to the inbound velocity of a golf ball fired at the clubhead). Twelve randomly selected drivers produced by two clubmakers are tested and the coefficient of restitution measured. The data follow: Club 1: 0.8406, 0.8104, 0.8234, 0.8198, 0.8235, 0.8562, 0.8123, 0.7976, 0.8184, 0.8265, 0.7773, 0.7871 Club 2: 0.8305, 0.7905, 0.8352, 0.8380, 0.8145, 0.8465, 0.8244, 0.8014, 0.8309, 0.8405, 0.8256, 0.8476 Test the hypothesis that both brands of ball have equal mean overall distance. Use a = 0.05 and assume equal variances. Answer the following questions regarding the t-test. 1. How many degrees-of-freedom are there in this problem (needed for finding the critical t- values). 2. What is the absolute values of the critical t-value for this problem? We are using a two- tailed t-test with a significance level of 5%. (use four significant figures) 3. What is…
The figure shows a plot of potential energy U versus position x of a 0.270 kg particle that can travel only along an x axis under the Influence of a conservative force. The graph has these values: UA9.00 ). Uc 20.0 J and Ug 24.0J. The particle is released at the point where Uforms a "potential hill" of "height" Ua 12.0J. with kinetic energy 7.50 J.What is the speed of the particle at la) -3.50m and (b)x - 6.50 m? What is the position of the turning paint on (c) the right side and (d) the left side?
L. y X VA A VB PLANE OF CONTACT BY UBC Engineering On an air hockey table, two pucks of identical mass collide in the middle of the rink. Puck A had an initial m velocity vA 1.9? and puck B had an initial velocity vB = 3.2j The plane of contact can be thought of as a line angled 0 = 34° above the x-axis. If the coefficient of 0.5 between the pucks, what are the velocities of the pucks after the impact? || m according to the x-y axis shown. restitution is e =
A SpaceX rocket has just launched, and the below table shows it's altitude versus time. Using only this data, calculate the best estimation of the rocker's acceleration at time=4.5 seconds. time (s) altitude (m) 0.0 0.0 1.5 12.0 3.0 34.0 4.5 78.0 6.0 205.0 7.5 562.0 ⒸA. 36.9 m/s² ⒸB. 57.0 m/s2 OC. 238 m/s² D.84.7 m/s² E. 102.2 m/s²
The following data describes the motion of a body through a period of 10 minutes. 0 1 2.25 3.5 5 5 6 8 9 8.5 9 10 7 6.5 4.5 Time, t, (min) 7 8 8.5 Velocity, v, (m/s)0 8 Determine the most accurate estimation of the acceleration of the body at 1= 8 min.
Using Newton’s laws, we could show that for some pendulums, the period T is related to the length l and free-fall acceleration g by T=2pi square root of (l/g) , or T2 = (4pi2/g) * l Does one of your graphs support this relationship? Explain. (Hint: Can the term in parentheses be treated as a constant of proportionality?)
the following data is obtained for the velocity of a vehicle during a crash test: t(ms) v(mph) 0 30 10 29.5 20 28 30 23 40 10 50 5 60 2 70 0.5 80 0 if the vehicle's weight is 2,400 lb, approximate the force f in lb acting on the vehicle 40ms after the crash. the force can be calculated by F=m(dv/dt) , and the mass of the car m is 2400/32.2 slug. note that 1 ms=10^-3 s and 1 mile = 5,280 ft. convert t to secons and mph to fps. use 1st order forward, backward, and centered difference and apply Richardson's approximation. use h1=0.02 and h2-0.01s.Show detailed solution. Thanks!
4. It is determined that an experimental data taken for T as a function of time, is a first order system, following the trend line of y = yoe. The data taken for various times is shown in table below. Approximate the time constant for this experiment. Show your work. T 0.00 0.50 3.00 5.00 5.50 6.00 6.50 7.00 7.50 11.00 14.00 17.00 22.00 25.00 Y 23.00 22.43 20.13 18.81 18.54 18.29 18.05 17.84 17.63 16.57 16.01 15.64 15.31 15.20