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: TIH 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.

Explain the methodology used to determine the most similar graph, using models or examples.

Attached question 5, along with equation 6.

A motorcycle starts from rest at s = 0 and travels along a straight road with the speed shown by the v –t graph. (Figure 1) Determine the motorcycle's acceleration when t = 12 s Express your answer to three significant figures and include the appropriate units. HA ? m a = 0,25 Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Figure Part D Determine the motorcycle's position when t = 12 s. Express your answer to three significant figures and include the appropriate units. v (m/s) s = 48.0 m v = 1.25 5 む=5 Submit Previous Answers v = -1+ 15 v Correct t (s) 10 15 Provide Feedback Next >