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January 31, 2015

January 31, 2015

Posted by **Leah** on Monday, November 28, 2011 at 10:30pm.

- Physics -
**Henry**, Wednesday, November 30, 2011 at 5:33pmW = mg = 11kg * 9.8N/kg = 107.8N. =

Weight of lawn mower.

Fm = 107.8N @ 0deg. = Force of mower.

Fp = Fh = 107.8sin(0) = 0 = Force parallel to ground = Hor comp.

Fv = 107.8cos(0) = 107.8N. = Force perpendicular to ground.

a. Fn = Fv + Fap*sin41,

Fn = 107.8 + 76sin41 = 157.7N.=Normal force upward from ground.

b. a = (Vf - Vo) / t,

a = (1.3 - 0) / 2 = 0.65m/s^2.

Fap = 76 + ma = 76 + 11*0.65 = 83.15N.

= Force applied.

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