Saturday

February 28, 2015

February 28, 2015

Posted by **Matt** on Tuesday, November 29, 2011 at 8:57pm.

the top of a driveway that is sloped at an

angle of 16.0 with the horizontal. An average

frictional force of 4.2×103 N impedes the car’s

motion so that the car’s speed at the bottom

of the driveway is 4.6 m/s.

The acceleration of gravity is 9.81 m/s2 .

What is the length of the driveway?

- physics -
**Damon**, Tuesday, November 29, 2011 at 9:38pmx = unknown length of driveway

distance it fell: h = x sin 16

potential energy lost = m g h = m g x sin 16

Ke gained = (m/2)(4.6)^2

difference = work done by friction = 4.3*10^3 * x

so

m g x sin 16 = (m/2)4.6^2 + 4.3*10^3 x

**Answer this Question**

**Related Questions**

Physics - A 4.0 × 103 kg car accelerates from rest at the top of a driveway that...

physics - A 3.1 × 103 kg car accelerates from rest at the top of a driveway that...

Physics - A 3.5 × 103 kg car accelerates from rest at the top of a driveway that...

Physics - A 3.5 × 103 kg car accelerates from rest at the top of a driveway that...

Physics - A 3.5 × 103 kg car accelerates from rest at the top of a driveway that...

Physics - A 4.2 × 10^3 kg car accelerates from rest at the top of a driveway ...

physics - A 2.10 103 kg car starts from rest at the top of a 5.8 m long driveway...

physics - A 2.1 103-kg car starts from rest at the top of a 5.9-m-long driveway ...

physics - A 2.1 103-kg car starts from rest at the top of a 5.9-m-long driveway ...

physics - A 2100 car starts from rest at the top of a 5.0m long driveway that is...