Question

A red train traveling at 72 km/h and a green train traveling at 144 km/h are...

A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward each other along a straight, level track. When they are 820 m apart, each engineer sees the other's train and applies the brakes. The brakes slow each train at the rate of 1.0 m/s2. Is there a collision?
If so, give (a) the speed of the red train, (b) the speed of the green train, and (c) the separation between the trains when they collide (0 m).
If not, give (a) the speed of the red train (0 m/s), (b) the speed of the green train (0 m/s), and (c) the separation between the trains when they stop.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

72 km/h = 20 m/s and 144 km/h = 40 m/s

Distance of stopping of red train :

Distance of stopping of green train :

200 + 800 = 1000 m separation is need but there is only 820 m . So there is a collision

a) the speed of the red train =  0 m/s

b) (b) the speed of the green train :

(c) the separation between the trains when they collide = 0 m

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A red train traveling at 72 km/h and a green train traveling at 144 km/h are...
A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward each other along a straight, level track. When they are 820 m apart, each engineer sees the other's train and applies the brakes. The brakes slow each train at the rate of 1.0 m/s2. Is there a collision? If so, give (a) the speed of the red train, (b) the speed of the green train, and (c) the separation between the trains...
When a high-speed passenger train traveling at vP = 153 km/h rounds a bend, the engineer...
When a high-speed passenger train traveling at vP = 153 km/h rounds a bend, the engineer is shocked to see that a locomotive has improperly entered onto the track from a siding and is a distance D = 847 m ahead (see the figure). The locomotive is moving at vL = 28 km/h. The engineer of the passenger train immediately applies the brakes. Assume that an x axis extends in the direction of motion. What must be the constant acceleration...
A train slows down as it rounds a sharp horizontal turn, going from 96.0 km/h to...
A train slows down as it rounds a sharp horizontal turn, going from 96.0 km/h to 58.0 km/h in the 16.0 s that it takes to round the bend. The radius of the curve is 160 m. Compute the acceleration at the moment the train speed reaches 58.0 km/h. Assume the train continues to slow down at this time at the same rate. magnitude m/s2 direction ° backward (behind the radial line pointing inward)
A train slows down as it rounds a sharp horizontal turn, going from 98.0 km/h to...
A train slows down as it rounds a sharp horizontal turn, going from 98.0 km/h to 52.0 km/h in the 16.0 s that it takes to round the bend. The radius of the curve is 140 m. Compute the acceleration at the moment the train speed reaches 52.0 km/h. Assume the train continues to slow down at this time at the same rate. magnitude m/s2 direction ° backward (behind the radial line pointing inward)
A 1.50 T train car is traveling at 36.0 km/h. After being loaded with cargo equal...
A 1.50 T train car is traveling at 36.0 km/h. After being loaded with cargo equal to half of the car’s mass, the train pulls the car away at twice its original speed. By how much has the train car’s kinetic energy changed? Note that 1T = 1000 kg.
A car traveling 57.8 km/h is 21.7 m from a barrier when the driver slams on...
A car traveling 57.8 km/h is 21.7 m from a barrier when the driver slams on the brakes. The car hits the barrier 2.22 s later. (a) What is the car's constant deceleration magnitude before impact? (b) How fast is the car traveling at impact?
A car traveling 54.8 km/h is 23.3 m from a barrier when the driver slams on...
A car traveling 54.8 km/h is 23.3 m from a barrier when the driver slams on the brakes. The car hits the barrier 1.84 s later. (a) What is the car's constant deceleration magnitude before impact? (b) How fast is the car traveling at impact?
A space vehicle is traveling at 5030 km/h relative to Earth when the exhausted rocket motor...
A space vehicle is traveling at 5030 km/h relative to Earth when the exhausted rocket motor is disengaged and sent backward. The relative speed between the motor and the command module is then 83 km/h. The mass of the motor is four times the mass of the module. What is the speed of the command module relative to Earth just after the separation?
A space vehicle is traveling at 4150 km/h relative to Earth when the exhausted rocket motor...
A space vehicle is traveling at 4150 km/h relative to Earth when the exhausted rocket motor is disengaged and sent backward. The relative speed between the motor and the command module is then 83 km/h. The mass of the motor is four times the mass of the module. What is the speed of the command module relative to Earth just after the separation?
Find the speed [km/h] at which Superman (mass=85 kg) must fly into a train (mass =...
Find the speed [km/h] at which Superman (mass=85 kg) must fly into a train (mass = 19000 kg) traveling at 77 km/hr to stop it? A: 1.38×104 B: 1.72×104 C: 2.15×104 D: 2.69×104 E: 3.36×104 Tries 0/1 Running into the train at that speed would severely damage both train and passengers. Calculate the minimum time [s] Superman must take to stop the train, if the passengers experience an average acceleration of -0.44*g (g = 10 m/s2)? A: 1.59 B: 2.31...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT