# Recent content by Serendipitydo

1. ### Electromagnetic Induction Lab. Magnet through a coil

I apologize in advance if some of my answers don't quite make sense. I'm generally articulate, but not when it comes to physics I'm barely grasping. I did a lab and part of it was dropping a magnet through a coil, which produced a Voltage vs Time graph using LabPro. For trial 1 we had the N...
2. ### Final velocity of a proton through parallel plates

Homework Statement A moving proton has 6.4x10^-16 J of kinetic energy. The proton is accelerated by a potential difference of 5000 V between parallel plates. http://members.shaw.ca/barry-barclay/Self-Tests/test09/elecst17.gif The proton emerges from the parallel plates with what...
3. ### Collision. A moving object hits a stationary object and moves at an angle

Thanks for the help. Not sure I followed it all exactly, and it was long past when it had to be handed in. I kind of gave him two papers and told him, "Take this one, no this one, wait, maybe this one" and he just took both so we'll see what happens. I don't know why my grasp of vectors is...
4. ### Collision. A moving object hits a stationary object and moves at an angle

Ok so I found the difference in momentum for ball 1(.400kg) is 0.280kg m/s. Then I used that to find that ball 2's velocity is that divided by the mass (.500kg) to get 0.560m/s. Now I just need the direction. I know in a different question we assumed the y components were the same, so can I...
5. ### Collision. A moving object hits a stationary object and moves at an angle

Yes I used the squared 0.500kg. Should I be using the 30, 60, 90 triangle made by the x and y components of the momentum of the .400kg ball? I'm not sure how to use ball 1 to figure out ball 2's(the heavier one) direction.
6. ### Collision. A moving object hits a stationary object and moves at an angle

This is all I have. Some one please please pleeeeeaaaase check this over and see if I'm in any way on the right track. I haven't had much sleep the past few days and am really stressing over my courses. This is a take home part of our unit test. I hope I did this right because it could really...
7. ### Finding Momentum of a fragment after explosion

Homework Statement A small explosive device slicing to the right breaks into two pieces. The momentum of fragment 1 after the explosion is 23kg.m/s 28°RCS What is the momentum of fragment 2 after the explosion? Homework Equations PT=PT' P=mv Rx= Rcos∅ Ry= Rsin∅ R= √x2+y2 The...
8. ### Kinetic Energy of a mass moving in horizontal circle

Just to update, I got that question correct. In the solution the teacher showed us, he combined the two formulas and got the same answer.
9. ### Kinetic Energy of a mass moving in horizontal circle

Homework Statement A mass moves in a circular path that has a radius of 24.6cm on a horizontal frictionaless surface. If the centripetal force acting on the mass is 96.5N, what is the kinetic energy of the mass? r=0.246m Fc=96.5N Homework Equations He told us to use these and "play...
10. ### Finding displacement with coefficient of friction, mass and velocity

So the acceleration would be negative and friction would influence it. I just don't know what to use to find Fnet, not knowing Fa. Is Fnet -4.0N ? The negative force of friction?
11. ### Finding displacement with coefficient of friction, mass and velocity

The only equations we have are: Fnet=ma Fg=mg Ff=μFN a=(Vf-Vi)/t Vf2=Vi2+2ad d=Vit+1/2at2 d=[(Vf+Vi)/2]t
12. ### Finding displacement with coefficient of friction, mass and velocity

Homework Statement A physics student slides a 2.0kg textbook along the laboratory bench to her friend. She imparts to the book an initial velocity of 2.70m/s. μ=0.20. How far away is her friend if the book comes to a stop right in front of her friend Vi= 2.70m/s μ=0.20 m=2.0kg Vf= 0m/s...
13. ### Finding mass within a pulley system. Finding coefficient of friction

Thanks for your help. I tend to overthink these things
14. ### Finding mass within a pulley system. Finding coefficient of friction

I'm not having problems with the others, just when I need to find a mass with minimal info. Fg1-FT=ma Use the total mass of the system. The difference of force of gravity and tension on the rope would be the net force acting on the system.
15. ### Finding mass within a pulley system. Finding coefficient of friction

But I only need the mass of the one.