Multiple ChoiceJill can throw a ball at a speed of 80 mph, consistently, on the ground. She gets into the back of a truck, which drives down the road in the +x-direction direction at 30 mph. Jill faces the back of the truck and throws a ball. According to Galilean relativity, what is the x-component component of the velocity of the ball relative to the ground?82
Multiple ChoiceSam is cruising in his spaceship moving at 0.9c. Suzy is directly in front of Sam and is at rest. Suzy flashes her headlights at Sam, hoping he will slow down. According to Sam, how fast is the light from Suzy's headlights moving as it approaches him?122
Multiple ChoiceOlive the astronaut is flying her spaceship back home to earth at 0.9c. Her spaceship has lights on it; one at the front of her ship, and one at the back of the ship. Olive notes that the two lights flash simultaneously. Are they simultaneous according to an Earth-based observer? If not, which one blinked first?83
Textbook QuestionA newspaper delivery boy is riding his bicycle down the street at 5.0 m/s. He can throw a paper at a speed of 8.0 m/s. What is the paper's speed relative to the ground if he throws the paper (a) forward, (b) backward, and (c) to the side?1
Textbook QuestionA baseball pitcher can throw a ball with a speed of 40 m/s. He is in the back of a pickup truck that is driving away from you. He throws the ball in your direction, and it floats toward you at a lazy 10 m/s. What is the speed of the truck?3
Textbook QuestionAn electron moving to the right at 0.90c collides with a positron moving to the left at 0.90c. The two particles annihilate and produce two gamma-ray photons. What is the wavelength of the photons?4
