Astudent developed an experiment to measure the acceleration of the gravity. in the experiment, two photogates were used to measure the time it takes the object to fall from rest (at the first photogate) and reach the lower gate. the distance between the two photogates was 53.0 cm and the recorded time was 325 ms (millisecond). calculate the magnitude of the velocity at the lower photogate.

How would doubling the made of an object change the objects potential energy

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

What are two different ways you could find the value of a? explain these methods.