Skid marks at the scene of an accident indicate that a car took 55 m to stop. Assuming that the car slowed down uniformly at a rate of 8.0 m/s2, answer the following questions: a) How fast was the car going before it started to stop? Report your final answer in miles/hour. b) How long did it take the car to come to a stop? Report your answer in seconds. Please provide work :)

For path C in the figure below, find the distance traveled in meters. A В C D 0 2 4 6 8 10 12 displacement x (m)

As a technical engineer in the army, you are part of a team in charge of testing and commissioning a new tank recently purchased by the artillery. Field testing has revealed the following information: 1) The tank moves from rest to a speed of 70 km/hr in 10 seconds. 2) Using the breaking system, the tank is brought to a complete stop from a speed of 70 km/hr in 5 seconds. You are required to address all the questions below providing all calculations, graphs, and explanations as appropriate to back your answers. First: Motion of the tank: a) Find the average driving acceleration of the tank. b) Calculate the average breaking acceleration of the tank. c) For parts (a) and b above parts report your answers in US Customary Units (mile/hr) so that the information could be shared with experts from the US.

SOLVE STEP BY STEP IN DIGITAL FORMAT 14. If the speed in (m/s) that a certain athlete reaches in a 200-meter race is described by the function v(x) =-0.005x(x - 300), where x is the recommended distance. a) What distance has the athlete traveled when he reaches his maximum speed?b) What is the maximum speed he reaches?

Use the worked example above to help you solve this problem. A typical jetliner lands at a speed of 149 mi/h and decelerates at the rate of (10.1 mi/h)/s. If the jetliner travels at a constant speed of 149 mi/h for 1.5 s after landing before applying the brakes, what is the total displacement of the jetliner between touchdown on the runway and coming to rest?

The position of a particle is given by s = 0.20t3 - 0.67t? - 2.96t + 4.92, where s is in feet and the time tis in seconds. Plot the displacement, velocity, and acceleration as functions of time for the first 11 seconds of motion. After you have the plots, answer the questions as a check on your work. --+ s, ft -1 1 Questions: When t = 1.3 sec, v = ft/sec2 i ft/sec, a = i When t = 8.3 sec, v= ft/sec, a = i ft/sec2 The positive time at which the particle changes direction is i sec.

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A person stands at the edge of a cliff and throws a rock horizontally over the edge with a speed of v = 23.0 m/s. The rock leaves his hand at a height of h = 43.0 m above level ground at the bottom of the cliff, as shown in the figure. Note the coordinate system in the figure, where the origin is at the bottom of the cliff, directly below where the rock leaves the hand. 4 7 i (a) What are the coordinates of the initial position of the rock? (Enter your answers in m.) Xo = Yo = m (b) What are the components of the initial velocity? (Enter your answers in m/s.) Vox = m/s m/s Voy

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