Answer to Question #262486 in Physics for Jane

Question

1. Place two coins on the edge of the table at the same distance above the floor.

2. Drop the two coins at the same time and listen to the sound as they strike the

floor. Coin A must be dropped directly while

Coin B must be thrown in a projectile. You can

do this by flicking the coin across the table to

strike the first coin at the table’s edge. Try to

aim “off center”, this will drop the coin straight

down while projecting the coin with some

horizontals peed.

3. Record the time it takes for the two coins to

drop the floor. You may ask assistance of two

person in your house or someone to record the time.

Record your data on the provided answer sheet.

Calculate the time it will take for the coin to drop using equations for free-falling

bodies and projectile motion. Assume a zero initial velocity for both coins.

Compute for the percentage difference between calculated time and the experiments.

Show your solutions on the provided answer sheet.

Answer 1

Tine for coin 1 is 0.42 s, time for coin 2 is 0.43 s. The theoretical result for both is

$$t=\sqrt{2h/g}=0.42 s$$

for 87-cm-tall table.

The % difference is 0 for coin 1 and 2% for coin 2.