Newton\'s 3 laws (ch4) and applications (ch5) Problem 4.41 3 of 10 PartA Uphill
ID: 1874665 • Letter: N
Question
Newton's 3 laws (ch4) and applications (ch5) Problem 4.41 3 of 10 PartA Uphill escape ramps are sometimes provided to the side of steep downhill highways for trucks with overheated brakes For a simple 15 upward ramp, what length would be needed for a runaway truck traveling 12D km/lh ? Note the large size of your calculafed length. (If sand is used for the bed of the ramp its length can be reduced by a factor of about 2 Express your answer using two significant figures. 1: Submit Provide Feedback Next >Explanation / Answer
a = - g * sin theta = - 9.8 * sin 15 deg = -2.536426642 m/s^2
120 km/h = 33.3333 m/s
s = - ( 33.33333 m/s ) ^2 / ( 2 * -2.536426642 ) = 219.0307996 m ==============ANSWER)