When does a pendulum bob move fastest and why?
A pendulum bob will move fastest when the mass is at its lowest point (when x=0). The reason for this is that in the pendulum system energy is transferred between kinetic and gravitational potential energy, and total energy will always be fixed in the system. Gravitational potential energy will be at its minimum when the bob is at the lowest point, meaning that kinetic energy will be at its maximum, resuting in the bob moving fastest at this point.
JB
Related Physics A Level answers
All answers ▸Sphere A (mass m), moving with speed 3v, collides with sphere B (mass 2m) which is moving in the opposite direction with speed v. The two spheres then combine, calculate the resulting velocity of the combined spheres.
Explain how Maxima and Minima occur in Young's double slit experiment
Using Fermat's Principle explain why it makes sense for light be refracted when crossing from one medium into another that has a different refractive index.
Find current and voltage across resistors R1 and R2, when they connected in parallel and in series. A 12V battery is connected, R1=4Ω and R2=3Ω.