# physics

a bullet travelling horizontally at a speed of 350 m/!@#\$%^&s a board perpendicular to the surface, passes through it and emerges on the other side at a speed of 210 m/s . if the board is 4.00 cm thick, how long does the bullet takes to pass through it ?

1. 👍 0
2. 👎 0
3. 👁 690
1. In the case of uniform acceleration,
distance = average speed * time
distance = 0.04m
average velocity = (350+210)/2 m/s
= 280 m/s
Time = distance / average speed
= 0.04/280 s
= 1.43*10-.4 s

1. 👍 0
2. 👎 0
2. Vavg = (210+350)/2 = 280 m/s.

t = d/V = 0.04/280 = 0.00014286 s. =
142.86 uS.

1. 👍 0
2. 👎 0
posted by Henry

## Similar Questions

1. ### physics

A bullet traveling horizontally at a speed of 350 hits a board perpendicular to its surface, passes through and emerges on the other side at a speed of 230 . If the board is 3.80 thick, how long does the bullet take to pass

asked by sammy on September 29, 2012
2. ### Physics

A bullet traveiling horizontally at aspeed of 350 m/s hits a board perpendicular to the surface, passes through it, and emerges on the side at a speed of 210m/s. if the board is 4.oo cm thick, how long does the bullet take to pass

asked by Anonymous on September 3, 2009
3. ### Physics

while at the shooting range, jonathan shoots a bullet traveling horizontally with speed of 35 m/s. the bullet hits a board, perpendicular to the surface, passes through it and emerges on the other side with speed of 21 m/s. if the

asked by lian on September 19, 2013
4. ### physics

A bullet is fired through a wooden board with a thickness of 8.0 cm. The bullet hits the board perpendicular to it, and with a speed of +350 m/s. The bullet then emerges on the other side of the board with a speed of +210 m/s.

asked by scott on September 11, 2014
5. ### Physic

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

asked by Arneisha on January 30, 2015
1. ### physics

A bullet is fired through a wooden board with a thickness of 10.0 cm. The bullet hits the board perpendicular to it, and with a speed of +390 m/s. The bullet then emerges on the other side of the board with a speed of +234 m/s.

asked by sandy on May 21, 2015
2. ### Physics

A bullet is fired through a wooden board with a thickness of 12.0 cm. The bullet hits the board perpendicular to it, and with a speed of +370 m/s. The bullet then emerges on the other side of the board with a speed of +333 m/s.

asked by Grayson on January 30, 2015
3. ### physics

a bullet traveling horzontally at a speed of 350m/s hits board perpendicular to its surface passes through n emerges on the other side at a speed fo 210m/s. if the board is 4.00cm thick, how long does the bullet take to pass

asked by john on September 25, 2009
4. ### Physics

A bullet is fired through a board 12.1 cm thick, with a line of motion perpendicular to the face of the board. If the bullet enters with a speed of 375 m/s and emerges with a speed of 205 m/s, what is its acceleration as it passes

asked by James on May 18, 2012
5. ### Physics

A 25 g bullet with a muzzle velocity of 300 m/s is fired into a board 4.0 cm thick. A). In a hard board, the bullet penetrates 3.0 cm and comes to a stop. What is the average force exerted on the bullet by the board? B). For a

asked by Reed on March 18, 2016

More Similar Questions