A train which is traveling at 100 mi/hr applies its brakes as it reaches point A and slows down with a constant deceleration. Its decreeased velocity is boserved to be 60 mi/hr as it passes a point 1/2 mile beyoind A. A car moving at 50 mi/hr passes B at the same instant that the train reaches point A. In an unwise effort to beat the train to the crossing, the driver "steps on the gas" Calculate the constant acceleration a that the car must have in order to beat the train to crossing by 4 sec and find the velocity v of the car as it reaches the crossing. Note: 1 mi = 5280 ft Train 1 mi 100 mi/hr 50 mi/hr B Car 1.3 mi

A train which is traveling at 100 mi/hr applies its brakes as it reaches point A and slows down with a constant deceleration. Its decreeased velocity is boserved to be 60 mi/hr as it passes a point 1/2 mile beyoind A. A car moving at 50 mi/hr passes B at the same instant that the train reaches point A. In an unwise effort to beat the train to the crossing, the driver "steps on the gas" Calculate the constant acceleration a that the car must have in order to beat the train to crossing by 4 sec and find the velocity v of the car as it reaches the crossing. Note: 1 mi = 5280 ft Train 1 mi 100 mi/hr 50 mi/hr B Car 1.3 mi

Name: A train which is traveling at 100 mi/hr applies its brakes as itreach
Uploaded: 2024-03-05T11:56:34.000Z
Channel: Bartleby
Description: A train which is traveling at 100 mi/hr applies its brakes as itreaches point A and slows down with a constant deceleration. Itsdecreeased velocity is boserved to be 60 mi/hr as it passes apoint 1/2 mile beyoind A. A car moving at 50 mi/hr passes B

An Introduction to Physical Science

14th Edition

ISBN:9781305079137

Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Chapter2: Motion

Section2.3: Acceleration

Problem 2PQ

See similar textbooks

Similar questions

My pug/bulldog mix, Georgia, who is blind and deaf, gets a whiff of her dinner. As soon as it registers to her that it's dinnertime, she runs 4.12 meters from the middle of our living room to our kitchen, where she is satiated with her grub. If it takes her 4.45 s to get to the kitchen, what was her speed in m/s to the nearest hundredth?
To stop the car, a car leaves a skid marks 200m long on the highway. Assuming a deceleration of 7.5m/s2, what must be the speed of the car before braking?
You drive a beat-up pickup truck down a straight road for 5.2 mi at 43 mi/h, at which point yourun out of fuel. You walk 1.2 mi farther, to the nearest gas station, in 27 min (= 0.450 h). What isyour average velocity from the time you started your truck to the time that you arrived at thestation?
In problem 11, if the dragstrip is ¼ mile, or 402.3 meters long, at the acceleration of 24.1 m/s2, what is the time that thedragster records for his or her quarter mile run to two decimal places assuming uniform acceleration during the entirelength of the track? What was the dragster’s final velocity in miles per hour (two decimal places) when it crossed thefinish line and deployed its parachute?
In World War II, there were several reported cases ofairmen who jumped from their flaming airplanes with noparachute to escape certain death. Some fell about 20,000feet (6000 m), and some of them survived, with few lifethreatening injuries. For these lucky pilots, the tree branchesand snow drifts on the ground allowed their deceleration to berelatively small. If we assume that a pilot’s speed upon impactwas 123 mph (54 m/s), then what was his deceleration?Assume that the trees and snow stopped him over a distanceof 3.0 m.
A car is travelling at a constant speed of 100 km.hr at NLEX when the driver noticed that the bridge 10 m away is cut off. If the driver immediately applied the brakes upon noticing the cut off bridge, what must be his deceleration so he would not fall to the river?
An egg drops from a second-story window, taking 1.24s to fall and reaching a speed of 12.2m/s just before hitting the ground. On contact with the ground, the egg stops completely in 0.131s. Calculate the average magnitude of its acceleration while falling, and then the average magnitude of its acceleration while stopping.
A locomotive is accelerating at 1.87m/s^2. It passes through a 15.1m wide crossing in a time of 3.07s. After the locomotive leaves the crossing, how much time is required until its speed reaches 28.0m/s?
Suppose a car is traveling at +19.9 m/s, and the driver sees a traffic light turn red. After 0.269 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 5.00 m/s2. What is the stopping distance of the car, as measured from the point where the driver first notices the red light?
A runner is moving with a speed of 2.68[m/s]. How long will it take the runner to complete a 5.0[km] race? Express your answer in seconds. Ignore the time it takes to reach this speed, and assume the runner is always at this speed.
An express train passes through a station that is 220 m long. It enters with an initial speed of 22.5 m/s and decelerates at a rate of 0.14 m/s2 as it goes through. During what time interval, in seconds, is the front of the train within the station? How fast is the train moving, in meters per second, when its front leaves the station? If the train is 130 m long, how long, in seconds, after the front of the train enters the station does the end of the train leave the station? What is the velocity of the end of the train as it leaves in m/s?
A car is traveling from rest and attained a speed of 72m/s covering a total of 200m along the path. How much time (in seconds)has elapsed for the entire motion?