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An indestructible bullet 2.00 cm long is fired straight through a board that is 10.0 cm thick. The bullet strikes the board with a speed of 460 m/s and emerges with a speed of 300 m/s. (To simplify, assume that the bullet accelerates only while the front tip is in contact with the wood.)

a) what is the average acceleration of the bullet through the board? answer m/s^2

b) What is is the total time that the bullet is in contact with the board? answer s

c)What thickness of board (calculated to 0.1 cm) would it take to stop the bullet, assuming that the acceleration through all boards is the same? answer cm

a) what is the average acceleration of the bullet through the board? answer m/s^2

b) What is is the total time that the bullet is in contact with the board? answer s

c)What thickness of board (calculated to 0.1 cm) would it take to stop the bullet, assuming that the acceleration through all boards is the same? answer cm

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A ranger in a national park is driving at 28.0 mi/h when a deer jumps into the road 155 ft ahead of the vehicle. After a reaction time t, the ranger applies the brakes to produce an acceleration of a = -9.00 ft/s2. What is the maximum reaction time allowed if she is to avoid hitting the deer?

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represent the given velocity 230km/h in the direction 2000

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A ball rolls off the top of stair way with a horizontal velocity of magnitude 2 m/s.The steps are 10 cm high and 20 cm wide. if g =10 m/s^2 ,then the ball hits first the edge of which step?

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A spaceship moving with an initial velocity of 58.0 meters/second experiences a uniform acceleration and attains a final velocity of 153 meters/second. What distance has the spaceship covered after 12.0 seconds?

A.

6.96 × 102 meters

B.

1.27 × 103 meters

C.

5.70 × 102 meters

D.

1.26 × 102 meters

E.

6.28 × 102 meters

A.

6.96 × 102 meters

B.

1.27 × 103 meters

C.

5.70 × 102 meters

D.

1.26 × 102 meters

E.

6.28 × 102 meters

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Why did you use the height from the release point of the ball to the table top instead of all the way down to the floor?

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a 1600-kg car is traveling at 20 m/s around a curve with a radius of 120m. What is the angular momentum of the car?

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two ways that you can generate electricity in a laboratory to light a small bulb without using a power supply? and how can you make the bulb glow?

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An elevator accelerates upward at 3m/s2 for a brief time. A 500 N woman standing on bathroom scales notices the reading is not what she expected. What fo the scales read?

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a 6kg cart on a level surgacr is pulled at a constant velocity of 2m/s by a constant force of 10 N. What is the acceleration ? What is the friction force opposing the motion?

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