On a certain stretch of track, trains run at 50 mph. How far back of a stopped train should warning torpedo is placed to signal an oncoming train? Assume that the brakes are applied at once and retard the train at the uniform rate of 2 ft/s?.

Q: The driver's manual says a tire car in good condition and at a speed of 80 km / h can stop at a…

A: Write the given values with the suitable variables. u1=80 km/h=80×10003600 m/s=22.22 m/sd1=56.7…

Q: one stone falls from a cliff, a second one is thrown 3 seconds later, and they both hit the ground…

A: The first stone is dropped from the rest and the second stone with an initial velocity of 58.8 m/s,…

Q: A train which is traveling at 74 mi/hr applies its br

A: Given:  Initial velocity of train ut =74mi/hr Final velocity of train is vt =56mi/hr st =1/2…

Q: ng opposite to Car A at a constant velocity of 25 Car A starts and accelerates at a constant rate.…

A: equation of motion is  v= u+at s= ut+1/2at² v²=u²+2as

Q: 7. A train is traveling down a straight track at 20 m/s when the engineer applies the brakes,…

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Q: The head of a rattlesnake can accelerate at 55 m/s² in striking a victim. If a car could do as well,…

A: The head of a rattlesnake can accelerate at a=55 m/s2 in striking a victim. If a car could do as…

Q: 2/34 A vacuum-propelled capsule for a high-speed tube transportation system of the future is being…

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Q: vx(t) = (a + 23t³ - 3yt5+48t7-6εt), a, ß, y, 6, and e are just constants. (A) Determine an…

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Q: Two trains, one traveling at 20 m/s , and the other at 40m/s , are headed toward one another along a…

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Q: asdThe particle is moving along a stright path such that its velocity at any time t is given by v  =…

A: Given Datav=24t-6t2 ***as per our company policy we are supposed to do only three subpart if you…

Q: Two locomotives approach each other on parallel tracks. Each has a speed of 155 km/h with respect to…

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Q: ou are driving a car along a straight road at 133 kph. Suddenly, you saw  a cat crossing the road…

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Q: A bicyclist is initially traveling at a speed of 7.6 m/s. He saw a snake on the trail 12 meters away…

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Q: A train which is traveling at 100 mi/hr applies its brakes as it reaches point A and slows down with…

A: Apply the third kinematic equation to determine the deceleration of the train.

Q: A dynamite blast at a quarry launches a rock straight upward, and 1.5 s later it is rising at a rate…

A:

Q: A dog runs at 21 km/h [N] for 5.0 min, slows to a stop over a period of 8.0 s, sniffs at a tree for…

A: The path covered by the dog is given below. Average velocity is given by v=total displacementtotal…

Q: A particle's position is given by x = 6.00 - 9.00t + 3t², in which x is in meters and t is in…

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Q: An aircraft touches down at a speed of 200 km/hour and the brakes are applied. If the aircraft…

A: Given : u=200 km/hr=55.56 m/s v=20 km/hr=5.56 m/s a=-0.05v=-0.278 m/s2

Q: (a) It takes a car 5.5 seconds to accelerate from rest to 25 m/s. Calculate the distance traveled by…

A: (a) To calculate the distance traveled by the car while it is accelerating from rest to 25 m/s in…

Q: An SUV designed to operate bet. Two stations 8 km apart. Maximum acceleration and deceleration are…

A: Given data The distance between the stations is d = 8 km = 8000 m The acceleration between the two…

Q: 5) A rugby ball on Mars, where the acceleration due to gravity is 0.379g and air resistance is…

A: Let the initial speed of the ball be u Therefore using kinematic equation  v=u-gmarstWhere v is the…

Q: 3. Braking uniformly reduces the speed of a train from vị = 36 km/h to v2 = 7.2 km/h during 100…

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Q: A car is traveling at 96 km/h when the driver sees an accident 75 m ahead and slams on the brakes.…

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Q: during

A: When the speed of a body is calculated at a particular instant of time it is called instantaneous…

Q: An initially stationary hovercraft sits on a large lake. When a whistle blows the hovercraft…

A: See below

Q: The magnitude of average velocity is always ……to the average speed. equal Less Greater than Less…

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Q: A driver distracted by their cell phone stopped clear of an unimpaired driver 145 ft away after 4.5…

A: The car is moving in 64.44 ft/s

Q: On a 200 km bike cycle ride, you ride the first 90 km at an average speed of 20 m/s. What must your…

A: Given :                Total distance = 200km                First ride = 90km…

Q: Researchers doing satellite tracking of albatrosses in the Southern Ocean observe a bird maintaining…

A: Since the bird is moving with the wind so the velocities are positive. The speed of the bird with…