Physics

posted by .

A 69990 kg locomotive is traveling at 9.86 m/s when its engine and brakes both fail. How far will the locomotive roll before it comes to a stop? (The coefficient of rolling friction is 0.002.)

• Physics -

Not sure, but I'll take a crack at it since no one else answered the question. KE=Force of Friction * distance. 1/2(MV^2)=mg *U*d= 1/2[(69,990Kg)(9.86m/s)^2 =(69,990Kg) (9.8m/s^2) *(0.002) *d. Masses cancel out, so the equation should be written as 1/2(9.86m/s)^2=(9.8m/s^2)*(0.002)*d. Rearranging the equation, solve for d.

Similar Questions

1. physics

A girl pulls a toy train with a horizontal force of 10N The tention between the locomotive and the carrdge is 3N the friction on the carrydgers in and the mass of the locomotive and carrydge are 2 kg and 1kg respectively now calculate …
2. physics

A locomotive pulls a series of wagons. Which is the correct analysis of the situation?
3. Physics

Two toy locomotives approach each other along the same line, and upon collision both stop dead still. One locomotive has three times the speed of the other and the sum of their masses is 4.48 kg. What is the mass of the faster locomotive?
4. Physics

Locomotive A travels 100km/hr and locomotive B travels 140km/hr. Locomotive B starts 15 kilometers Behind locomotive A and travels on the same direction. Find the time elapsed and how far each traveled before they meet.
5. Physics

two locomotives start at the SAME place but Locomotive A gets a half hour head start. Locomotive A travels at 100 km/hr and Locomotive B travels at 140 km/hr.Find the time elapsed and how far each traveled before they meet.
6. physics

When a high-speed passenger train traveling at 98 mi/h rounds a bend, the engineer is shocked to see that a locomotive has improperly entered onto the track from a siding 0.42 mi ahead. The locomotive is moving at 16 mi/h. The engineer …
7. physics

A locomotive is running at a constant speed of 100 km/ h. The diameter of driving wheels is 1.8 m. The stroke of the piston of the steam engine cylinder of the locomotive is 600 mm. Find the centripetal acceleration of the crank pin …
8. physics

A locomotive is running at a constant speed of 100 km/ h. The diameter of driving wheels is 1.8 m. The stroke of the piston of the steam engine cylinder of the locomotive is 600 mm. Find the centripetal acceleration of the crank pin …
9. physics

A locomotive is running at a constant speed of 100 km/ h. The diameter of driving wheels is 1.8 m. The stroke of the piston of the steam engine cylinder of the locomotive is 600 mm. Find the centripetal acceleration of the crank pin …
10. Physics

The rolling resistance for steel on steel is quite low; the coefficient of rolling friction is typically μr=0.002. Suppose a 180,000 kg locomotive is rolling at 19 m/s on level rails. A) If the engineer disengages the engine, how …

More Similar Questions