Saturday

December 20, 2014

December 20, 2014

Posted by **Hope** on Wednesday, December 2, 2009 at 6:15am.

The figure or graph has F (N) along the y axis and velocity along the x axis. A diagonal line drops from positive 10 force to -10 force from 0 cm to 4 cm. and crosses the x axis at 2 cm.

What is its velocity at 2 cm and 4 cm?

What formula do I need to use?

physics - drwls, Tuesday, December 1, 2009 at 6:58pm

Integrate F dx from 0 to 0.02 m to get the change in kinetic energy (KE) at 2 cm. Use the new value of the KE to get the new velocity. Then do it again for 0.02 to 0.04 m. The KE will decrease, since the force on the particle is in the opposite direction to motion over that interval.

physics - Hope, Tuesday, December 1, 2009 at 10:20pm

Please explain to me how to integrate-I am unsure exactly what this means in this problem

Thanks

- physics -
**bobpursley**, Wednesday, December 2, 2009 at 8:38amOk, integrate is a calculus term. Here is the algebra way.

You know f(x)*x is the energy. But f(x)*x is the area under the f(x) line. So use your geometry to find the area under the f(x) line first at x=.02m, then x=.04 m.

That area is the energy gained.

KEfinal=keoriginal+ energy gained.

**Answer this Question**

**Related Questions**

physics - A 1.6 kg particle moving along the x-axis experiences the force shown ...

Physic - A 10 kg particle moving along the x-axis experiences the force shown in...

Physics - A particle starts from the origin at t = 0 and moves along the ...

physics - A force of magnitude Fx acting in the x-direction on a 2.50-kg ...

Physics - The figure gives the acceleration a versus time t for a particle ...

Physics - Figure 2-41 gives the acceleration a versus time t for a particle ...

Physics - Moving in the x-direction, a particle carrying 1.0uC experiences no ...

Physics-Help please... - The graph give the acceleration a versus time t for a ...

Physics - Figure (a) shows charged particles 1 and 2 that are fixed in place on ...

Physics - Figure (a) shows charged particles 1 and 2 that are fixed in place on ...