Tuesday
September 16, 2014

Homework Help: physics hey bob

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

First Name:
School Subject:
Answer:

Related Questions

physics bob - still i cant find the normal force without mass of automabile. is ...
Physics - A 850.0-kg car travelling on a level road at 27.0 m/s (60.5 mi/hr) can...
physics - a car of mass 12,000 kjg is moving at 40m/s along a strong road. The ...
Physics - A driver approaches an intersection at a speed of 50km/h, when the ...
College physics - According to test performed by the manufactures, an automobile...
physics - A car travels along a roadwith a speed of v=25 m/s (about 50 mi/h). ...
Physics Help, Please! - When a car goes around a curve (without skidding), on a...
Physics - If the force of friction is constant, prove that the stopping ...
physics - on a level road the stopping distance for an automobile is 35.0m for ...
Physics - A car traveling at 20 m/s applies the brakes. The coefficients of ...

Search
Members