Lecture Problems

# Lecture Problems - canyon, as shown at right. The initial...

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Chapter 2 Problems: A stupid man shoots a bullet straight upwards. The bullet leaves the gun at time t = 0 with velocity v = v o = 200 m/s [U]. Assume a = 9.81 m/s 2 [D] at y o = y ( t = 0) = 0. 1) The barrel of the gun is 30 cm long. This means that the bullet accelerated from rest to 200 m/s over a distance of 30 cm. a) What is the average acceleration of the bullet while it is still inside the gun? b) How much time did the bullet spend inside the gun as it accelerated?

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A stupid man shoots a bullet straight upwards. The bullet leaves the gun at time t = 0 with velocity v = v o = 200 m/s [U]. Assume a = 9.81 m/s 2 [D] and y o = y ( t =0) = 0. 2) At what time t > 0 is the velocity of the bullet 10.0 m/s [D]? 3) What is the maximum altitude of the bullet? 4) When is the bullet at an altitude of 500 m?
A cannon shoots a cannonball projectile toward the wall of a

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Unformatted text preview: canyon, as shown at right. The initial velocity of the projectile is v = 200 m/s [R40U] and its acceleration is 9.81 m/s 2 [D]. 5) What is the projectiles velocity at time t = 2 s? 6) What is the projectiles position at time t = 2 s? 7) If the projectile hits the bottom of the canyon what is its range? 8) If the projectile hits the wall of the canyon, what is its altitude at impact? 9) So where does the projectile land? 2000 m An object is moving at 10 m/s [N] at time t = 0. It is moving at 10 m/s [W30S] at time t = 2 s. 10)What is the average acceleration of the object during this 2 second time interval? 11)What is the displacement of the object during this time interval? 12)Assuming that its acceleration is constant, what is the velocity of the object at time t = 1 s?...
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## This note was uploaded on 02/10/2012 for the course PHYS 123 taught by Professor Phys123 during the Spring '10 term at Buena Vista.

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Lecture Problems - canyon, as shown at right. The initial...

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