Constant Force

1. Sep 18, 2007

chaotixmonjuish

A block of mass 8.3 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of 53.0 N at an angle 25.3° above the horizontal. What is the magnitude of the acceleration of the block?

I'm just wondering how I set up an equation with an angle.

2. Sep 18, 2007

bel

Separate the applied force into its horizontal and vertical components using the trigonometric ratios or use the method of tension co-efficients.

3. Sep 18, 2007

chaotixmonjuish

That's where I'm having a problem.

would it be something like:

y=(mass)(sin(30)a)
x=(mass)(cos(30)a)

4. Sep 18, 2007

bel

How about $$F_x = F(cos (\frac{\pi}{6}))$$ ?

5. Sep 18, 2007

chaotixmonjuish

wow, how did you get that

6. Sep 18, 2007

HallsofIvy

Staff Emeritus
Yes, something like that. But of course the angle isn't 30 degrees.