Calculate Magnitude of Force to Push 10 kg Object 11m, Speed 2 to 5.2 m/s

  • Thread starter Thread starter cthionic
  • Start date Start date
  • Tags Tags
    Force Magnitude
AI Thread Summary
To calculate the magnitude of the force required to push a 10 kg object over 11 meters, the initial speed is 2 m/s and the final speed is 5.2 m/s. The initial kinetic energy is calculated as 20 J, while the final kinetic energy is 135 J, resulting in 115 J of work done. The work-energy principle indicates that the work done equals the force multiplied by the distance. By dividing the total work (115 J) by the distance (11 m), the magnitude of the force is determined to be approximately 10.5 N. This calculation aligns with the principles of work and energy being reviewed in class.
cthionic
Messages
5
Reaction score
0

Homework Statement


"A force was used to push a 10 kg object through a distance of 11 metres. Its speed was initially 2 m/s, and was increased to 5.2 m/s at the end of the 11 metres. What was the magnitude of the force?"


Homework Equations


Ek = 1/2 mv^2
W = fd?

The Attempt at a Solution



Initial kinetic energy was 20, final = 143. 123 J of work went into the system. Unsure of what to do from here, or if that was the correct approach. We're reviewing "work and energy" chapter in class, so I would assume it would be along those lines. multiple choice options are 10.5 N, 115 N, 230 N, 23 N.
 
Physics news on Phys.org
You know the amount of work that was done and you know the distance the force acted to do that work.
 
Oops. I see my mistake, I was dividing 123 by 11, 143 J at 5.2m/s isn't correct, it's actually 135. Thanks.
 
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 'Struggling to make relation between elastic force and height'
Hello guys this is what I tried so far. I used the UTS to calculate the force it needs when the rope tears. My idea was to make a relationship/ function that would give me the force depending on height. Yeah i couldnt find a way to solve it. I also thought about how I could use hooks law (how it was given to me in my script) with the thought of instead of having two part of a rope id have one singular rope from the middle to the top where I could find the difference in height. But the...
Back
Top