Hocky puck vel/displacement/acc

  • Thread starter Thread starter DarkTangent
  • Start date Start date
AI Thread Summary
A horizontal air table can support hockey pucks, allowing them to move with minimal friction. A puck with a mass of 0.250 kg is pushed by a 1.00 N force for 2.00 seconds, prompting a discussion on calculating its acceleration, final velocity, and displacement. The correct formula for acceleration is derived from Newton's second law, f=ma, leading to an acceleration of 4 m/s². The user initially struggled with the equations but ultimately clarified their approach. The calculations for velocity and displacement will follow from this established acceleration.
DarkTangent
Messages
3
Reaction score
0
1. By pumping air up through thousands of tiny holes we can make a horizontal air table that will support several pucks so that they can move around on cushions of air with very little friction. Suppose that one such puck initially at rest, having a mass of 0.250 kg, is pushed along by a 1.00 N force for 2.00 s. Determine its acceleration and the final velocity at the end of 2.00 s. What will be the displacement?



2. Well, of all the equations that I thought I should use, I thought it would be Acceleration=(Velocity final-Velocity initial)/(time)



3. I've made several attempts at a solution but I'm not sure if I'm using the right equation, someone mind pushing me in the right path?
 
Physics news on Phys.org
Never mind. I figured out that f=ma and I know the force and the mass. No biggy :)
The rest will be easy to figure out, thanks :)
Though, it would be (1 kg m/s^2)/ (.250 kg) = 4 m/s^2, correct?
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Thread 'Trying to understand the logic behind adding vectors with an angle between them'
My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
Back
Top