(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Hi,

The question im a bit confused about is this:

A block is dragged across the ground by a light cable,attached to a winch. Th block is initally at rest.

Information given:

Volume: 6m³

Density 2875 kg/m³

Coefficent of friction between block and the ground: 0.4

Diameter: 1.4m

Find the force that must be applied to the block to overcome friction and cause it to accelerate at a rate of 0.4m/s²

3. The attempt at a solution

So I've first got to find the mass right? m=D.V= 2875*6= 17,250 KG

Then I can find its weight. w=m.g = 17,250*9.81= 169,222.5 N

Now I need to find the force acting down on the block right? Fa= m.a

=17,250*0.4= 6900N

And the frictional force acting Frictionalforce= μ*w = 0.4*169,222.5= 67,689N

Then the total force should equal: Tforce=√Frictional force²+Fa²= √67689²+6900²= 68,039.77308 right?

Have I gone wrong somewhere?

Many thanks

Matt

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Finding the resultant force

**Physics Forums | Science Articles, Homework Help, Discussion**