Free Body Diagrams for hockey puck

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SUMMARY

The discussion centers on the forces acting on a hockey puck sliding on a smooth icy surface at constant velocity. Participants identified the relevant forces, concluding that the correct forces include weight, normal force, and the force of push, while dismissing air drag and friction due to the surface conditions. The concept of velocity is clarified as not being a force, and the distinction between force and momentum is emphasized. The conversation highlights the importance of understanding force definitions in physics.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Basic knowledge of forces and their definitions
  • Familiarity with concepts of friction and air resistance
  • Ability to differentiate between force and momentum
NEXT STEPS
  • Study Newton's First Law of Motion in detail
  • Learn about free body diagrams and their applications
  • Explore the effects of friction on different surfaces
  • Investigate the relationship between force, mass, and acceleration
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Students studying physics, educators teaching mechanics, and anyone interested in understanding the dynamics of motion and forces in real-world scenarios.

Chandasouk
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Homework Statement



A hockey puck slides along a horizontal, smooth icy surface at a constant velocity as shown. (Part A figure) Which of the following forces act on the puck?



139323A.jpg




Okay, for this the choices are (list check all that apply)

force of velocity x
air drag
weight x
acceleration
force of push x
normal force x
friction

Since it is on an icy surface, I neglect friction and I ignored air drag because in the introduction, it told me

the force of air drag, similar in some ways to the force of friction, may come into play. These forces are directed so that they resist the relative motion of the surfaces. To simplify problems you often assume that friction is negligible on smooth surfaces and can be ignored. In addition, the word friction commonly refers to resistive forces other than air drag that are caused by contact between surfaces, so you can ignore air drag in problems unless you are explicitly told to consider its effects.

I was wondering why my choices were not correct?
 
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Chandasouk said:
force of velocity x
force of push x

I was wondering why my choices were not correct?

Hi Chandasouk! :wink:

i] velocity has no force (were you thinking of momentum? momentum isn't a force)

ii] it's sliding, so why do you think anything is pushing it? :smile:
 

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