1. A steel wire of mass 0.400 kg and length 0.640 m supports a 102-kg block. The wire is struck exactly at its midpoint causing a small displacement. Calculate how long it will take the peak of this displacement to reach the top of the wire. 102 kg
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- A mass of 0.340kg oscillates up and down on a spring with a spring constant 45.0 N/m. What is the angular frequency of this motion?6. The static coefficient of friction μs applies to an object of mass m placed on a platter that revolves about a vertical axis at frequency f. Derive an expression for the maximum distance r from the center of the platter at which the object can remain without sliding off the platter.3. The physical pendulum. (a) In class, we derived the formula for the frequency of the physical pendulum W3 Mgl I (1) Show that the expression for the frequency of the simple pendulum is consistent with this. Then derive (1) using the energy method, where the total energy is the sum of the rotational kinetic energy 1/1 (do/dt) 2 and the potential energy of the centre of mass mghem. To obtain the result you will need to use the small angle expression for cosine: cos 01-02/2, for 0 < 1. (b) A thin square plate of side L and mass M is hanging from a pivot that is drilled into one of its corners. The pivot passes perpendicularly through the plate. The plate is then lightly tapped and starts to undergo small oscillations. Using the energy method, determine the period of the oscillation, making the small angle approximation. The moment of inertia for an axis running through the centre of a square plate is ICM ML²/6. =
- A 0.200-m uniform bar has a mass of 0.676 kg and is released from rest in the vertical position, as the drawing indicates. The spring is initially unstrained and has a spring constant of k = 28.0 N/m. Find the tangential speed with which end A strikes the horizontal surface. Number i Units 0.100 m Pivot (friction less) 0.100 m 0.100 m2. An un-stretched spring has a length of 0.50 m and a spring constant of 100. N/m. What force is required to stretch this spring to a length of 0.60 m?T14f, please help me with my reviewer, I can’t get the answer for the step 2.