Posted by **Hunter** on Monday, June 20, 2011 at 9:03pm.

3.A car with a mass of 1500 kg is parked on a hill with an incline of 20°.

a.What is the weight of the car?

b.What is the normal force the car experiences? (hint: balance the forces parallel and perpendicular to the hill using Newton’s second law)

c.What is the magnitude of the force of static friction that keeps the car from sliding down the hill? (hint: balance the forces parallel and perpendicular to the hill)

d.What is the coefficient of static friction? (hint: use the answers you found in b and c to solve for mu. If you did not find answers for b and c, assume N=10000N and f=5000N – note that these are not the correct numbers. They are only here so you can work part d, even if you can’t get b and c)

- Physics -
**Henry**, Tuesday, June 21, 2011 at 7:35pm
a. Fc = mg = 1500kg * 9.8N/kg = 14700N.

Wc = 1500kg / 0.454kg/lb = 3304lbs. =

weight of car in lbs.

b. Fv = mgcos20 = 14700cos20 = 13,814N.

= Force perpendicular to the hill.

c. Ff = Fp = Force parallel to the hill.

Ff = Fp = mg*sin20 = 14,700sin20 = 5028N.

d. u = Ff / Fv = 5028 / 13814 = 0.364.

## Answer This Question

## Related Questions

- Physics - A 1300 kg El Camino is parked on a 20 degree hill.(20 degrees above x ...
- physics - A car is rounding a circular curve of radius r on a banked turn. As ...
- physics - A roller coaster car speeds down a hill past point A and then rolls up...
- Physics - Let your car have a mass of 825 kg. Your car is moving at a speed of ...
- Physics - A drunken driver crashes his car into a parked car that has its ...
- physics hw - A 300. kg roller coaster car is traveling at a constant speed of 15...
- Physics - A car weighing 1.1*10^4 N is parked on a 35 degree slope. Find the ...
- physics - A sports car of mass 950kg (including the driver) crosses the rounded ...
- physics - A 1310-kg car is being driven up a 9.12 ° hill. The frictional force ...
- physics - A 1100-kg car is being driven up a 4.0° hill. The frictional force is ...

More Related Questions