Recent content by ChrisMC

A uniform electric field of 1.0 N/C is set up by a uniform distribution of charge in the xy-plane. What is the electric field inside a metal ball placed 0.50 m above the xy-plane? E= Fe/q E=(kq1q2)/r^2 0= ((9x10^9)(1)(q2))/.5^2 q2= 0 does this sound right?

I honestly don't know where to start, I thought if the mass on top was heavier than the mass hanging wouldn't move.

In the figure, m1 = 3.0 kg. Use work and energy to find the speed of the m2 = 1.7 kg block just before it hits the floor in each of the following cases. http://www.webassign.net/knight/p11-48alt.gif (a) The table is frictionless. . m/s (b) The coefficient of...

cos(135) = -sqrt(2)/2 and cos(150) = -sqrt(3)/2 Where do I plug them into? what would be the equation to find T1?

.5mv^2-.5mv^2 using 7.5 and 4 as the velocities. thank you very much 9.05625 btw

I have no idea, what that means t1s angle 150? t2s 135?

http://www.webassign.net/knight/ex11-15.gif

to get t1 I used w= (1100*sin45)*5.5 to get t2 I used w= (1820*sin60)*5.5 *If I don't keep the sigfigs the webquestions get counted wrong

Those are the ones i need to figure out, i figured out the force in the y direction with trig functions then used w=fd I got t1 = 4316.886899 t2 = 8668.914292 but they were wrong

0? but its looking for work

http://www.webassign.net/knight/ex11-9.gif

A 450 g particle moving along the x-axis experiences the force shown in Figure Ex11.15. The particle goes from vx = 4.0 m/s at x = 0 m to vx = 7.5 m/s at x = 2 m. What is Fmax? Where the maximum peak on the force by distance graph is at 1m F=ma v=d/t a=v/t I have no idea how to...

The two ropes seen in Figure Ex11.9 are used to lower a 235 kg piano 5.5 m from a second-story window to the ground. How much work is done by each of the three forces? (T1 = 1820 N andT2 = 1110 N) t1 is 45degrees north of east t2 is 60degrees north of west w = J T1 = J...

the .2 one is in the front, I still don't know what the equation would be

yes they are touching each other, I used the combined mass because its a system