The answer is (c): 2.00 seconds, as can be seen by clicking your mouse on the photograph below (well, almost).
The equation to determine how far an accelerated body moves as a function of time is:
where a is the acceleration.
The time for the accelerating body M to move the distance D between the two photocell gates due to the gravitational force on m is given by:
where g is the acceleration of gravity. Substituting 2M for M and 2m for m yields approximately t = t0 or 2.00 seconds, reasonably close to the value obtained in the video.
The answer is (d): 2.00 seconds, as can be seen by clicking your mouse on the photograph below.
The equation to determine how far an accelerated body moves as a function of time is:
where a is the acceleration.
The time for the accelerating body M to move the distance D between the two photocell gates due to the gravitational force on m is given by:
where g is the acceleration of gravity. Substituting D/2 for D and 2M for M, the factors of two cancel each other, yielding t = t0 or approximately 2.00 seconds, reasonably close to the value obtained in the video.
