Recent content by richyr33

Ok that's great thanks!

Homework Statement An angular displacement θ radians in time t seconds is given by the equation θ = sin 3t. Find a:) angular velocity when t = 1 second b:) the smallest positive value of t for which the angular velocity is 2rad/s c:) the angular acceleration when t = 0.5 seconds d:) the...

Frictional force = μ * total reaction force total reaction force = mass * gravitational force You have worked out the force already in your attempt at a solution

Yes this is exactly what's confusing me and I have two differing explanations in my notes which adds to it! I have worked it out for the stroke being the amplitude as well and i have the same answers as you have worked out and I have also done it as above where i have taken the amplitude to be...

I think in this case the displacement and amplitude are the same value as the question asks for maximum velocity which would be when displacement is at a maximum, which would be distance from the centre like you say, which is 150mm/2. I came up with an answer of 27.47m/s for velocity and...

That is the question in full. It just says the stroke of the engine is 150mm. The only pieces of information I am missing are A=Amplitude and s = displacement. Only thing that is confusing me is the difference between the two. Is amplitude the distance from bottom of stroke to top or is that the...

Homework Statement Calculate acceleration and velocity of a piston. Stroke is 150mm and engine speed 3500rpm Using simple harmonic motion equations Homework Equations a = -ω^2*s v = ω*√A^2 - s^2 ω = 2*∏*f v = velocity, a =...

yes that is all the information that is in the question. I have previously calculated a maximum linear velocity which i now assume is what i have to use to answer the question even though it makes no reference to it. Many thanks for your replies.

Homework Statement I have a wheel with a diameter of 1.4m and the radius of gyration is 0.42m. The wheel has a mass of 13kg. Calculate maximum rotational kinetic energy. Homework Equations The Attempt at a Solution From this all i can do is calculate the moment of inertia which...