Exam 3: How Things Move: Galileo Asks the Right Questions

On the planet Jupiter, a dropped object picks up a speed of 20 m/sec in one second. How fast will it be going at the end of 3 seconds of fall, neglecting "air" resistance on Jupiter?

A stone is lifted and released so that it falls to the ground. According to Galileo, it fell because

In which of the following cases does the automobile have an acceleration?

An astronaut drops a rock on the moon. It falls 1 meter in 1 second. In 4 seconds, it falls a total distance of

A ball is moving at 20 m/s. If no forces act on it, then 5 seconds later the ball's speed will be

An artificial satellite moves at a steady 25,000 km/hr in a circular orbit around Earth. Is it accelerated?

A car is rounding the top, or crest, of a hill while moving at a steady 50 km/hr. What can you say about this car's acceleration, and why?

A simple "do it yourself" experiment, performed in class, showing that objects accelerate as they fall is

A book is given a brief shove along a table top and released so that it slides a short distance and comes to rest. According to Aristotle, it stopped because

In twice the time, an object will fall

A rock is dropped from rest off of a high cliff on another planet, planet X. There is no atmosphere, and thus no air resistance, on planet X. At the end of 1 second, the rock is moving at a speed of 6 m/s. What is the rock's average speed during the entire first second [from t=0 until t=1 sec]?

In our study of falling objects, we noted that the total distance fallen was approximately 5 m in 1 s, 20 m in 2 s, 45 m in 3 s, and 80 m in 4 s. Which of the following best describes the pattern in this data?

Which of the following describes an object that is accelerated?

An object is dropped from rest on the planet Jupiter. At the end of 1 second, it has fallen 8 m and is moving at 16 m/s. The total distance fallen after [i.e., at the end of] two seconds will be

On the planet Venus, a Venusian picks up a stone and drops it into a deep hole. If it falls 3 m in 1 second, how far will it fall in 2 seconds? You can neglect Venusian air resistance.

On Mars, the acceleration due to gravity is 8 m/s/s. If an object is dropped over the surface of Mars, how fast will it be moving at the end of 3 seconds of fall?

Which statement is the most accurate for falling objects on Earth?

What keeps Earth moving?

In the figure, the moon is moving clockwise in a circular orbit around Earth. Imagine that gravity was suddenly shut off, throughout the solar system, at the instant when the moon is in the position shown in the figure. How would the moon move, after gravity was shut off?

If a helium- filled balloon is released on Earth, it rises. How would a helium- filled balloon move if it were released a few feet above the surface of the moon?