Recent content by willyadventur

To calculate the rate of acceleration don't we need to know the average torque? That is from rest (to get the load moving) through the engines rpm range to 35 mph. Which would be calculated as a function F(x) torque (or maybe F(x) power)? Willy

To calculate the rate of acceleration don't we need to know the average torque? That is from rest (to get the load moving) through the engines rpm range to 35 mph. Which would be calculated as a function F(x) torque (or maybe F(x) power)? Willy

My basic question is when a moving object collides with a stationary object, in a non elastic collision, how much mass does the stationary object have to have to cause both objects to remain stationary after impact; cause the colliding object to rebound, cause the colliding object to remain...

Dear PeterO Does Kinetic energy = Momentum^2 / (2*mass), um, Sure it does , (but I wouldn't want to confuse Ke with momentum) MomentumF • t = m • Δ v. a force of 800 N for 0.9 seconds, then we could say that the impulse was 720 N•s. This impulse would cause a momentum change of...

Dear PeterO Please consider your statement very carefully (which is correct and is supposed to rebut mine) “If you double the speed of a truck, you double its momentum, but the work needed to stop it is 4 times as great. triple the speed, triple the momentum, but 9 times the work needed”...

Dear PeterO Please consider your statement very carefully (which is correct and is supposed to rebut mine) “If you double the speed of a truck, you double its momentum, but the work needed to stop it is 4 times as great. triple the speed, triple the momentum, but 9 times the work needed”...

Momentum = M*V and the units are Kg*m/s，This can also be considered as measure of work required to alter your vehicles speed (or Ke (energy required), which is not exactly right, but close enough for the now) F= m*a， and the units are Newton’s, and this is a measure of Force required (don't...

I know this is an old post but 1) When braking the front of the car nose dives causing the car body to pitch forward (till at an angel), does this alter the normal force of gravity (of the vehicles body mass) acting on the all of the tyres Fnorm = M*g*Cosine Angel (Inclined plane, like)? I...

Hi Bob I have searched the internet for a long time for answers about torque, and you seem to know your stuff. Also I agree with the gear box selection and you seem to fit in well with the 1/4 mile speed trap method of estimating Hp. (I’ve also come across many American sites that the quote...

Hi Jay Hi hope I'm not being to annoying, In reference to my last posting Quote: “We have a sign hanging outside of a shop. The sign weighs 50kg and is supported by a rigid diagonal bar and a rigid horizontal bar (the sign is attached at the end of the horizontal bar”. So if we...

Hi Jay Sorry that's not quite what I meant so I'll rephrase. If we calculate the tension in member BC to be 15N and that is made up of a horizontal component of 5N and a vertical component of 10N and a beam angle of 60 degrees (I know these aren’t the actual equilibrium equations forces...

Hi There I don't know for sure, but, if we know the circumference of the circle and apply a 10 N.m torque * 2randians (and 2rads = 2 meters of circumference travel) Then 10n.m * 2m = 20N.m of work? And I presume that also = 20 joules? Willy

Um Ok But if you push a ball it initially has some inertia to over come to get it moving, but once it is rolling, because it is now spinning around, doesn’t gain inertia (which it must give up/transfer to something when it comes to a rest)? Or am I way off here? The three types of inertia...

Hi Jay Op's sorry; I think I can answer my last question. The shear load acting on Pin B is the total vector load, I.e. Bx + Bc= P. Thus 5N/m + 10N/m = 15N/m of shear; (divided by two for a double shear pin) Willy

Hi Jay Excellent, I am with you so far. So after calculating Bx & By (horizontal and vertical loads and arbitrarily let's say they are 5N/m and 10N/m ) Then when I use them to calculate the shear load acting on pin B do I keep them separate by saying we have two shear loads of 5N/m and...