What is the total time that the bullet is in contact

Reference no: EM1322205

Q1. An indestructible bullet 1.85 cm long is fired straight through a board that is 11.10 cm thick. The bullet strikes board with a speed of 455m/s and emerges with a speed of 279m/s. (To simplify, suppose 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 board?

(b) What is the total time that the bullet is in contact with board? (Enter the total time for the bullet to completely emerge from the board.)

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

Q2. An electron (mass = 9.11 x10-31 kg) leaves one end of a TV picture tube with zero initial speed and travels in a straight line to accelerating grid, that is 2.10 cm away. It reaches the grid with a speed of 2.74 x10^6 m/s. If the accelerating force is constant, compute the following. The acceleration, the time to reach the grid, and net force, in Newton's (You can ignore the gravitational force on the electron.)

Reference no: EM1322205

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