Homework Help: Physics

Posted by ucieng on Saturday, February 6, 2010 at 1:32pm.

A single conservative force acts on a 5.00 kg particle. The equation Fx = (2x + 4) N describes this force, where x is in meters. As the particle moves along the x axis from x = 1.40 m to x = 5.80 m, calculate the following.

(a) the work done by this force on the particle

(b) the change in the potential energy of the system

(c) the kinetic energy the particle has at x = 5.80 m if its speed is 3.00 m/s at x = 1.40 m

Physics - drwls, Saturday, February 6, 2010 at 2:10pm
(a) The work done is the integral of F dx from 1.4 to 5.8.

If you do not know how to integrate, multiply the AVERAGE force by 4.4 m. The average force is in this case the value at x = 3.60 m

(b) The P.E. change is MINUS the work done in part (a). Just change the sign.

(c) To get the new value of kinetic energy, add the work done to (1/2) M V^2, where Vo = 3 m/s
(K.E.)final = (Work done)+ (M/2)Vo^2
Physics - ucieng, Saturday, February 6, 2010 at 2:33pm
Thanks so much for your help drwls!

Answer this Question

Related Questions

physics - A single conservative force acts on a 5.00 kg particle. The equation ...
Physics - A single conservative force F(x) acts on a 1.6 kg particle that moves ...
physics - A particle moves through an xyz coordinate system while a force acts ...
physics - A particle moves through an xyz coordinate system while a force acts ...
physics - A force of magnitude Fx acting in the x-direction on a 2.50-kg ...
physics 911 - A force ~F = Fx ˆı+Fy ˆ| acts on a particle ...
physics - a particle is subject to a force fx that varies with a position shown ...
physics - A 2.6-kg particle moving along the x axis has a velocity of +1.7 m/s ...
physics - What does it mean to say the Coulomb Force is a conservative force? ...
physics - A single conservative force F = (7.0x - 11)i N, where x is in meters, ...

For Further Reading

First Name:
School Subject:
Answer: