Posted by **ami** on Thursday, September 2, 2010 at 3:20pm.

An engineer of a passenger train traveling at 25.0 m/s sights a freight train whose caboose is 200m ahead on the same track. The freight train is traveling at 15.0 m/s in the same direction as the passenger train. The engineer of the passenger train immediately applies the brakes, causing a constant accelaration of -0.100 m/s2, while the freight train continues with constant speed. Take x=0 at the location of the front of the passenger train when the engineer applies the brake.

(a) will the cows nearby witness a collision?

(b) if so, where it take place?

(c) on a single graph, sketch the positions of the frong of the passenger train and the back of the freight train.

- physics -
**bobpursley**, Thursday, September 2, 2010 at 4:29pm
do this with relative velocity

distance apart=-distancepassenger covers+200

distance apart= (25 -speed passenger)*time +200

distance= 25t - 15t + 1/2 .1 t^2 + 200

ok, solve for t when distance=0. If there is a solution, a collision occurs

## Answer This Question

## Related Questions

- Physics - the engineer of a passenger train traveling at 25.0 m/s sights a ...
- physics - The engineer of a passenger train traveling at 25.0 m/s sights a ...
- AP Physics - A passenger train is traveling at 27 m/s when the engineer sees a ...
- physics - A passenger train is traveling at 30 m/s when the engineer sees a ...
- Math - 5) A freight train leaves a station traveling at 32 km/h. Two hours later...
- algebra 1b - the speed of a passenger train is 18mph faster than the speed of a ...
- algebra - a passenger train's speed is 60mi/h, and a freight train's speed is ...
- math please help - The speed of a passenger train is 8 mph faster than the speed...
- Algebra - Speed of passenger train is 6mph faster than the freight train. The ...
- Math - A freight train travels 260 km in the same time a passenger train travels...

More Related Questions