You have been hired as an expert witness in an investigation of a quadcopter drone incident. The incident occurred during a very rare meteor shower during which several unusually massive chunks of meteoric material were passing through the atmosphere and striking the ground. The unmanned drone was hovering at rest over the center of a house on fire, having just dropped fire retardant, when it seemed to spontaneously explode into four large pieces. The locations of the four pieces on the ground were measured as follows, relative to the center of the house over which the drone was hovering:
The fire department is suggesting that the drone was defective and exploded while in use. The drone manufacturer is suggesting that the drone was struck by a meteorite, causing the explosion. Perform a calculation that will show evidence suggesting agreement with one of these positions.
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Chapter 9 Solutions
Physics for Scientists and Engineers
- A bullet of mass m=0.500 [g] is fired horizontally with a speed v=10.0 [m/s] into the bob of a ballistic pendulum of mass mP=0.500 [g]. Find the maximum height ℎ attained by the bob if the bullet passes through the bob and emerges with speed v/4.arrow_forwardA space vehicle is traveling at 4150 km/h relative to the Earth when the exhausted rocket motor is disengaged and sent backward with a speed of 74 km/h relative to the command module. The mass of the motor is four times the mass of the module. What is the speed (km/h) of the command module relative to Earth after the separation? (Note: this answer requires slightly higher precision than normal.)arrow_forwardIn the overhead view, a 300 g ball with a speed v of 6.0 m/s strikes a wall at an angle u of 30 and then rebounds with the same speed and angle. It is in contact with the wall for 10 ms. In unitvector notation, what are (a) the impulse on the ball from the wall and (b) the average force on the wall from the ball?arrow_forward
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