Wednesday
July 23, 2014

Homework Help: Physics

Posted by bryian on Wednesday, January 27, 2010 at 9:41pm.

Please help me with these three questions,they deal with coefficient of friction

1) A car rounds a turn of radius 25m at a speed of 20m/s. Find the coefficient of friction neccessary to keep the car on the road



2) A man is attempting to slide a piece of furniture weighing 750N long a floor. Ifhe exerts a force of 75N along a rope and angle of 35 degrees and the object does not move, what is the minimum value for te coeficient of friction?


3) Consider a block on a plane inclined at an angle of 30 degres. If the block weights 950N, what coefficient of friction is neccessary to hold it stationary?



Physics - bobpursley, Wednesday, January 27, 2010 at 8:00pm
1) set mv^2/r= mu*mg
solve for mu

2) the vertical component of tension reduces weight.

friciton= mu*(mg-75sin35)
horizontalforce= 75*cos35
set them equal, solve for mu.
3) I will be happy to critiqeu your thinking.






I wanted to know what you mean by the formulas. I do not know what the mg stands for...If it is miligrams then how does that relate to the problem. Thanks for your time again.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - Please help me with these three questions,they deal with coefficient ...
Physics - Please help me with these three questions. They deal with coefficient ...
Physics, help me please?! - A car travels around a circular turn of radius 50 ...
Physics - A car whose speed is 90.0 km/h (25 m/s) rounds a curve 180 m in radius...
science check my answers? - A car travels around a circular turn of radius 50 ...
physics - meerany A flat (unbanked) curve on a highway has a radius of 220.0 Ill...
Physics - A 2050 kg car rounds a circular turn of radius 18.5 m. If the road is ...
Physics - A car has a mass of 2500 kg rounds a circular turn with a radius of 50...
Physics - A 1220 kg car rounds a circular turn of radius 19.2 m. If the road is ...
physics - a 2000 kg car rounds a circular turn of radius 20.0 meters. if the ...

Search
Members