Comprehensive guidance on deriving the Doppler effect equations for relative motion between a sound source and an observer moving along a straight line connecting the two.
Derivation of the Doppler effect formulas Read More »
Identifying the Doppler effect equation applicable to a specific relative motion between the sound source and the observer using the Doppler effect general formula can be confusing. This post outlines a straightforward method to extract the relevant Doppler effect equation for any relative motion scenario described by the general formula, making the process much easier.
Tips for Using the Doppler Effect General Formula Read More »
A cart released from rest rolls down a frictionless 30-degree ramp, then bounces off a rubber block at the bottom of the ramp. Calculate the average force of impact on the rubber block.
Calculate force of impact Read More »
PROBLEM: A 1000 kg car traveling north-east at 20 m/s collides with a 1800. kg car traveling west at speed 16 m/s. After the collision the two cars stick together and skid for a distance. Calculate the speed and direction of the wreckage immediately after the collision.
Two dimensional Collisions Read More »
PROBLEM: A force F acts on a stationary object of a mass of 96 g for a duration of 30 milliseconds, causing it to move away from its initial position in a straight line on a frictionless surface. Fig. 1 shows the force as a function of time during that 30 milliseconds. Calculate the velocity of the object at times t = 5 ms, 20 ms, and 35 ms.
Calculating velocity from a force-time graph Read More »
