A bullet traveling horizontally at a speed of 350m/s hits a board perpendicular to its surface, passes through and emerges on the other side at a speed of 190m/s .
If the board is 3.80cm thick, how long does the bullet take to pass through it?
average speed going through is (350+190)/2
time=distance/avgvelocity
0.00043
To find the time it takes for the bullet to pass through the board, we can use the equation:
time = distance / speed
First, let's convert the thickness of the board to meters:
3.80 cm = 3.80 / 100 = 0.038 meters
The bullet is traveling horizontally at a speed of 350 m/s when it hits the board, passes through, and emerges at a speed of 190 m/s.
To find the time it takes to pass through the board, we need to calculate the distance the bullet travels through the board, which is equal to the thickness of the board.
Now we can calculate the time it takes for the bullet to pass through the board:
time = distance / speed
time = 0.038 m / (350 m/s - 190 m/s)
time = 0.038 m / 160 m/s
Now we can simplify it:
time = 0.00023875 seconds
So, the bullet takes approximately 0.00023875 seconds to pass through the board.