Posted by **anthony** on Sunday, October 31, 2010 at 8:53pm.

you help me solve this problem. but how am i suppose to if i dont know the mass of the car?

on a level road the stopping distance for an automobile is 35.0m for an initail speed of 90 km/hr what is the stopping distance of the same automobile on a simalr road with the slope 1:10

physics - bobpursley, Saturday, October 30, 2010 at 7:42am

Assume the coefficent of friction is the same.

F=mu*Normal force=ma

a= normalforce*mu/mass

Vf^2=Vi^2+2ad

solve for mu on the level road, knowing normalforce is mg.

Then, knowingmu, look at the slope

normal force=mg*SinTheta

Vf^2=Vi^2+2mgSinTheta*mu/m * d

solve for distance.

since Theta is a small angle, SinTheta=TanTheta= 1/10

## Answer this Question

## Related Questions

- physics bob - still i cant find the normal force without mass of automabile. is ...
- physics - on a level road the stopping distance for an automobile is 35.0m for ...
- College physics - According to test performed by the manufactures, an automobile...
- Physics - A 850.0-kg car travelling on a level road at 27.0 m/s (60.5 mi/hr) can...
- physics - A 1500 kg automobile travels at a speed of 105 km/h along a straight ...
- Physics - A 1500 kg automobile travels at a speed of 105 km/h along a straight ...
- Physics - A car traveling at 20 m/s applies the brakes. The coefficients of ...
- math - If a car is speeding down a road at 40 (mph), how long is the stopping ...
- physics - a) Find the maximum rate of deceleration of a car on a dry, level road...
- PHYSICS - An automobile travels 30 km due east on a level road . It then turns ...

More Related Questions