17.2c ON11 P43 Q3 Cube on Plate Contact | A2 Oscillation | Cambridge A Level Physics

[@rogue9433]

I've been struggling with this part my entire life, but not anymore! Thanks a lot💙

[@beastboysupper4353]

Life saver!!!!

[@rumaisasiddiqa9638]

how do we know that the highest position is above equilibrium position...why not below it??

[@WMW654]

When an object in an oscillating system, like a mass-spring system or a pendulum, reaches its maximum displacement and begins to return towards the equilibrium position, it may not lose contact with the surface below it for several reasons: Decrease in Acceleration: As the object reaches its maximum displacement and starts moving back towards the equilibrium position, the acceleration due to the restoring force (such as the spring force or gravity) decreases. This decrease in acceleration reduces the tendency for the object to lift off from the surface. Increased Normal Force: As the object moves downwards, towards the surface, the distance between the object and the surface decreases. This results in an increase in the normal force exerted by the surface to support the weight of the object. The increased normal force helps to keep the object in contact with the surface. Surface Friction: The presence of friction between the object and the surface can also play a role in preventing the object from losing contact. Friction opposes the relative motion between the object and the surface, providing an additional force that helps to maintain contact. Inertia: The inertia of the object also contributes to keeping it in contact with the surface. As the object moves downward, its inertia tends to keep it moving in the same direction, resisting any tendency to lift off from the surface. Overall, these factors work together to ensure that the object maintains contact with the surface as it moves back towards the equilibrium position after reaching maximum displacement.

[@amirahossain6602]

for the total energy of the oscillation why did you calculate the kinetic energy only?Why didn't you calculate the potential energy as well?

[@ETphysics]

At equilibrium position (x=0) the total oscillation energy IS ONLY kinetic energy, so we conveniently chose that point! No 'elastic' potential energy there.

[@just_an_island_girl]

How do we know that we have to calculate the energy at 'equilibrium position' ?

[@priscilla_wong]

The total energy is equal to the maximum kinetic energy (conservation of energy). It is easier and direct to just calculate the maximum kinetic energy at equilibrium position (where Ek is maximum)

[@chinyuandrew7973]

13:20

[@muhammednoor5269]

12:00, cracked my screen protector 😟 disliking the video now

[@ETphysics]

Oh nuuuuuu F in the chat

[@WMW654]

When an object in an oscillating system, like a mass-spring system or a pendulum, reaches its maximum displacement and begins to return towards the equilibrium position, it may not lose contact with the surface below it for several reasons: Decrease in Acceleration: As the object reaches its maximum displacement and starts moving back towards the equilibrium position, the acceleration due to the restoring force (such as the spring force or gravity) decreases. This decrease in acceleration reduces the tendency for the object to lift off from the surface. Increased Normal Force: As the object moves downwards, towards the surface, the distance between the object and the surface decreases. This results in an increase in the normal force exerted by the surface to support the weight of the object. The increased normal force helps to keep the object in contact with the surface. Surface Friction: The presence of friction between the object and the surface can also play a role in preventing the object from losing contact. Friction opposes the relative motion between the object and the surface, providing an additional force that helps to maintain contact. Inertia: The inertia of the object also contributes to keeping it in contact with the surface. As the object moves downward, its inertia tends to keep it moving in the same direction, resisting any tendency to lift off from the surface. Overall, these factors work together to ensure that the object maintains contact with the surface as it moves back towards the equilibrium position after reaching maximum displacement.