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  • Vehicle On 4 Jack Stands . . . Safe? - Car Talk Community
    A couple weeks ago I heard someone on the radio show mention supporting a vehicle with four jack stands, one at each “corner”, apparently by lifting one end with a jack, placing two stands, then doing the same at the other end I don’t remember if this was mentioned by Tom or Ray, or a caller, but I was left with the impression that it is an acceptable way to support a vehicle while
  • Calculations for Hydraulic Jacks lifting a load - Physics Forums
    The discussion focuses on the calculations involved in hydraulic jacks, specifically analyzing the relationship between forces and pressures in a system with a hand pump and a jack cylinder The hand pump has a piston area of 2 0 cm² and applies a force of 98 1 N, resulting in a pressure of 4 905 N cm² This pressure is transmitted to a jack piston with an area of 10 0 cm², allowing it to
  • Shade tree mechanics, dont forget to put the wheel under the car for . . .
    I’ve never put the wheel under the car, but I don’t trust pinch welds any more than jacks So yeah a couple Jack stands or separate bottle Jack I just kind of expect the car to come down so stay clear of it most of the time asemaster January 4, 2023, 7:29pm 12 TheWonderful90s:
  • Special car jack stand for sloped grades • Physics Forums
    The discussion revolves around the design and safety of a specialized jack stand intended for use on sloped surfaces Participants explore the feasibility, safety concerns, and potential designs for a jack stand that could operate effectively on uneven grades, considering both theoretical and practical implications One participant suggests designing a jack stand with a larger base and a
  • Putting a car on blocks - Car Talk Community
    We will be leaving the country for 9 months, and plan to leave a car (actually a pick-up truck) in the garage Should the truck be put “on blocks,” and how do you do this?
  • Solving Wheel Coming to a Stop: FBD, Friction Hysteresis
    jack action said: Imagine setting d to 0 It is still possible to have a x ≠ 0 and α ≠ 0 There would still be a F at the ground where F = m a x You could even add a F a at the center of rotation - a horizontal force coming from an axle - or an added braking wheel torque and they would all increase the magnitude of your F
  • Why are my front wheels able to spin freely when the car is in park . . .
    OK, so the front end of the car is on jack stands The rear is planted on the ground The car is in park Yet, I’m able to spin the front wheels with my hand Wouldn’t putting it in park lock the wheels via the transmission?
  • Friction Forces on 2WD vs 4WD Vehicles - Physics Forums
    The discussion revolves around the maximum acceleration of vehicles based on their drive configurations (2WD vs 4WD) and the coefficient of static friction Participants are examining how these factors influence the force of friction and acceleration in a physics context Conceptual clarification, Assumption checking, Exploratory Participants are exploring the relationship between the normal
  • Ramps VS. car jack - Maintenance Repairs - Car Talk Community
    I’d like to change the oil in my car by myself I want to buy car ramps, but some people say a car jack is better I’d rather have the opinion of those with experience, so, which one is safer to use?
  • Do Dual Fans Increase Radiator Efficiency More Than a Single Larger Fan . . .
    The discussion centers on the efficiency of dual fans versus a single larger fan in cooling a radiator, particularly in automotive applications Participants explore the implications of fan size, airflow dynamics, and the impact of fan arrangement on cooling performance One participant suggests that a single 17" fan rated at 1750 CFM may pull a greater percentage of air through the radiator





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