Lagrangian Mechanics:
A pendulum of mass m and length l hangs from the rear view mirror in a car traveling with horizontal acceleration a. Assume the car starts from rest at time t=0. (Solve using Lagrangian Mechanics.)
a) Draw a diagram of the situation. Write out the x and y coordinates of the position of the pendulum in the in terms of the angle of the pendulum, Φ, and the time t.
b) Write out T, U, and L in terms of the angle of the pendulum, Φ, and the time t.
c) Solve the E-L equation for the equation of motion for the pendulum bob. Find the equilibrium angle for the pendulum and show that it is equal to: Φo = tan-1(a/g)
Lagrangian Mechanics: A pendulum of mass m and length l hangs from the rear view mirror...
A simple pendulum with mass m = 2.3 kg and length L = 2.62 m
hangs from the ceiling. It is pulled back to an small angle of θ =
9.2° from the vertical and released at t = 0. 1) What is the period
of oscillation?
2) What is the magnitude of the force on the pendulum bob
perpendicular to the string at t=0?
3) What is the maximum speed of the pendulum?
4) What is the angular displacement...
A simple pendulum with mass m = 2.1 kg and length L = 2.79 m hangs from the ceiling. It is pulled back to a small angle of θ = 11.5° from the vertical and released at t = 0. 1) What is the period of oscillation? 2) What is the magnitude of the force on the pendulum bob perpendicular to the string at t=0? 3) What is the maximum speed of the pendulum? 4) What is the angular displacement...
A simple pendulum with mass m = 2.1 kg and length L = 2.3 m hangs from the ceiling. It is pulled back to an small angle of θ = 11.9° from the vertical and released at t = 0. 1)What is the period of oscillation? 2)What is the magnitude of the force on the pendulum bob perpendicular to the string at t=0? 3)What is the maximum speed of the pendulum? 5)What is the magnitude of the tangential acceleration as...
A simple pendulum with mass m = 1.8 kg and length L = 2.77 m hangs from the ceiling. It is pulled back to an small angle of θ = 9° from the vertical and released at t = 0. 1) What is the period of oscillation? Answer= 3.34 s 2) What is the magnitude of the force on the pendulum bob perpendicular to the string at t=0? Answer= 2.76 N 3) What is the maximum speed of the pendulum?...
A pendulum consists of a uniform rod of total mass m and length L that can pivot freely around one of its ends. The moment of inertia of such a rod around the pivot point is 1/3mL^2 The torque around the pivot point of the pendulum due to gravity is 1/2mgLsinθ, where θ is the angle the rod makes with the vertical and g is the acceleration due to gravity. a) Write down the equation of motion for the angle...
A) Write the Lagrangian for a simple pendulum consisting of a point mass m suspended at the end of a massless string of length l. Derive the equation of motion from the Euler-Lagrange equation, and solve for the motion in the small angle approximation. B) Assume the massless string can stretch with a restoring force F = -k (r-r0), where r0 is the unstretched length. Write the new Lagrangian and find the equations of motion. C) Can you re-write the...
A simple pendulum with mass m = 1.7 kg and length L = 2.47 m hangs from the ceiling. It is pulled back to an small angle of = 11.8° from the vertical and released at t = 0. 1) What is the period of oscillation? s Submit Help You currently have 10 submissions for this question. Only 15 submission are allowed. You can make 5 more submissions for this question. Your sih missions: Computed value: 2.9 Submitted: Thursday, November...
A simple pendulum with mass m = 2.1 kg and length L = 2.3 m hangs from the ceiling. It is pulled back to an small angle of θ = 11.9° from the vertical and released at t = 0. 4)What is the angular displacement at t = 3.56 s? (give the answer as a negative angle if the angle is to the left of the vertical) 6)What is the magnitude of the radial acceleration as the pendulum passes through...
A plane pendulum of length L and mass m is suspended from a
block of mass M. The block moves without friction and is
constrained to move horizontally only (i.e. along the x axis). You
may assume all motion is confined to the xy plane. At t = 0, both
masses are at rest, the block is at
, and the pendulum has angular deflection
with respect to the y axis.
a) Using
and
as generalized coordinates, find the Lagrangian...
Prob. 7.3: A simple pendulum (mass M and length L) is suspended from a cart (mass m) that canoscillate on the end of a spring of spring constant k, as shown in the figure at right. (a) Write the Lagrangian in terms of the generalized coordinates x and ?, where x is the extension of the spring from its equilibrium length and ? is the angle of the pendulum from the vertical. Find the two Lagrange equations. (b) Simplify the...