Problem 75
A jet touches down on a runway with a speed of \(142.4 \mathrm{mph} .\) After \(12.4 \mathrm{~s},\) the jet comes to a complete stop. Assuming constant acceleration of the jet, how far down the runway from where it touched down does the jet stand?
Problem 77
An object is thrown upward with a speed of \(28.0 \mathrm{~m} / \mathrm{s}\). How long does it take it to reach its maximum height?
Problem 78
An object is thrown upward with a speed of \(28.0 \mathrm{~m} / \mathrm{s}\). How high above the projection point is it after 1.00 s?
Problem 79
An object is thrown upward with a speed of \(28.0 \mathrm{~m} / \mathrm{s}\). What maximum height above the projection point does it reach?
Problem 80
The minimum distance necessary for a car to brake to a stop from a speed of \(100.0 \mathrm{~km} / \mathrm{h}\) is \(40.00 \mathrm{~m}\) on a dry pavement. What is the minimum distance necessary for this car to brake to a stop from a speed of \(130.0 \mathrm{~km} / \mathrm{h}\) on dry pavement?
Problem 81
A car moving at \(60.0 \mathrm{~km} / \mathrm{h}\) comes to a stop in \(t=4.00 \mathrm{~s}\) Assume uniform deceleration. a) How far does the car travel while stopping? b) What is its deceleration?
Problem 82
You are driving at \(29.1 \mathrm{~m} / \mathrm{s}\) when the truck ahead of you comes to a halt \(200.0 \mathrm{~m}\) away from your bumper. Your brakes are in poor condition and you decelerate at a constant rate of \(2.4 \mathrm{~m} / \mathrm{s}^{2}\) a) How close do you come to the bumper of the truck? b) How long does it take you to come to a stop?
Problem 83
A train traveling at \(40.0 \mathrm{~m} / \mathrm{s}\) is headed straight toward another train, which is at rest on the same track. The moving train decelerates at \(6.0 \mathrm{~m} / \mathrm{s}^{2},\) and the stationary train is \(100.0 \mathrm{~m}\) away. How far from the stationary train will the moving train be when it comes to a stop?
Problem 84
A car traveling at \(25.0 \mathrm{~m} / \mathrm{s}\) applies the brakes and decelerates uniformly at a rate of \(1.2 \mathrm{~m} / \mathrm{s}^{2}\) a) How far does it travel in \(3.0 \mathrm{~s}\) ? b) What is its velocity at the end of this time interval? c) How long does it take for the car to come to a stop? d) What distance does the car travel before coming to a stop?
Problem 85
The fastest speed in NASCAR racing history was \(212.809 \mathrm{mph}\) (reached by Bill Elliott in 1987 at Talladega). If the race car decelerated from that speed at a rate of \(8.0 \mathrm{~m} / \mathrm{s}^{2},\) how far would it travel before coming to a stop?
