Friday

March 27, 2015

March 27, 2015

Posted by **Harold** on Wednesday, March 4, 2009 at 10:02pm.

I get 7.1 please help, don't really get it.

- Physics -
**drwls**, Wednesday, March 4, 2009 at 10:20pmWhat are the units of the 7.1 that you get? degrees?

The 60 km/h speed converted to m/s is 16.667 m/s. As the truck goes along the road, it is performing work against friction at a rate of F*V = 400 N * 16.667 m/s = 6666.7 Watts PLUS work against gravity at a rate of M g sin A*V = 228,900 sin A watts

35,000 = 6667 + 228,900 sin A

sin A = 0.1238

A = 7.1 degrees

I agree with your answer, if it was in degrees

**Answer this Question**

**Related Questions**

physics - A truck of mass 8000 kg is accelerating at 5.0 m/s2 up a hill of ...

physics - An object is shot from the back of a truck moving at 40 km/h on a ...

physics - A truck with a mass of 1.5 x 103 kg accelerates to a speed of 18.0 m/...

physics - An engine of mass 5000 kg pulls a train of ten trucks each of mass ...

Physics - A 2600 kg truck traveling at 72 km/h slams on the brakes and skids to ...

physics - Rubber tires and wet blacktop have a coefficient of kinetic friction ...

physics - A truck engine transmits 28.0 { kW} (37.5 hp) to the driving wheels ...

Physics - Imagine a fender bender between a large truck and a small car. During ...

physics - A truck driver slams on the brakes and the momentum of the truck ...

physics - Initially a small car and a truck are at rest then the car starts ...