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Science Library Quiz

Centripetal and Centrifugal Forces

Instructions: answer the questions, check them carefully, and when you are sure they are all right, press submit. The number of correct answers will be displayed.

Question 1: In science fiction, spaceships are often made in the shape of a large wheel. Why is this? Artifical Gravity

Question 2: In the image of a joyride, a wheel rotates, causing the passengers to move out to the sides. If the supporting ropes were to break suddenly, in which direction would the people go ? Carousel joyride

Question 3: Why do scientists do thought experiments?

Question 4: What did David Scott prove when he dropped a hammer and a feather on the Moon?

Question 5: Newton's cannonball thought experiment is so famous because:

Question 6: Projectiles with horizontal velocities fall at the same acceleration as objects with no horizontal velocity. They all reach the surface at the same time, irrespective of their initial speed. Why then does Newton's cannonball not reach the Earth?

Question 7: Why are the Moon and all the planets moving?

Question 8: What do you call the time it takes a satellite to travel once around a planet?

Question 9: Why are a lot of satellites placed in geosynchronous orbit?

Question 10: Why aren't manned space stations in geosynchronous orbits?

Question 11: Why is it better to fire a projectile at 45° to the horizontal than horizontally?

Question 12: If an astronaut fired a projectile from his space station in the opposite direction to his motion, what would happen?

Question 13: What causes a book to slide on a car seat, when the car goes around a bend?

Question 14: What keeps the Moon in orbit around the Earth?

Question 15: How fast does Jupiter move in its orbit?

Question 16: Satellite A is in orbit around the Earth at 500km altitude. Satellite B is in orbit at 1000km. What can be said of their velocities?

Question 17: Which of these planets is travelling fastest in orbit?

Question 18: A car has an antenna pointing straight up. When it goes around a corner, which direction does the top of the antenna bend?

Question 19: Why do motocyclists lean over when they go around a bend?

Question 20: A 60kg lady experiences 4g on a roller coaster bend. What is the force on her?

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