Homework Help: PHYSICS PLEASE HELP !!!!!

Posted by Amanda on Thursday, October 27, 2011 at 2:45pm.

An object with a mass of 3.7 kg slides in the positive x direction across a horizontal surface with a coefficient of kinetic friction of 0.24. During its slide a force of 364 Newtons acts on it in the positive x direction while a force of 44 Newtons acts on it in the negative x direction. If the object gains 548 Joules of kinetic energy during its slide, how far did the object slide in meters?
Help me solve please .

PHYSICS PLEASE HELP !!!!! - Henry, Friday, October 28, 2011 at 9:59pm
Wo = mg = 3.7kg * 9.8N/kg = 36.26N. =
Weight of object.

Fo = 36.26N@0deg.
Fp=36.26sin(0) =0=Force perpendicular to surface.
Fv = 36.26cos(0) = 36.26N. = Force
perpendicular to surface.

Ff = u*Fv = 0.24 * 36.26 = 8.70N. =
Force of friction.

Fn = (F1 + F2) - Fp - Ff,
Fn = (324 - 44) - 8.70 = 271.3N.

Fn = ma,
a = Fn / m = 271.3 / 3.7 = 73.3m/s^2.

KE = 0.5mV^2 = 548J.
1.85V^2 = 548,
V^2 = 296.2,
V = 17.2m/s.

d = (Vf^2 - Vo^2) / 2a,
d = ((17.2)^2 - 0) / 146.6 = 2.02m.

Answer this Question

Related Questions

physics - A 5.0 kg object moving in the +x direction at 5.5 m/s collides head-on...
PHYSICS PLEASE HELP !!!!! - An object with a mass of 13 kg slides 5 meters ...
Physics - an object of mass 3 kg is moving in the positive x-direction with a ...
Physics - An object with a mass of 12 kg slides 9 meters across a horizontal ...
Physics - An object with a mass of 12 kg slides 9 meters across a horizontal ...
physics (newton's laws) - A 5.00 kg object placed on a frictionless, ...
Physics - A 2.85 kg stationary package explodes into three parts that then slide...
Physics - An object of mass 1.25 kg on a flat surface has two forces acting on ...
physics - A 2.0-kg object moving with a velocity of 5.0 m/s in the positive x ...
Physics - Stuck in the middle of a frozen pond with only your physics book, you ...

For Further Reading

First Name:
School Subject:
Answer: