Nicolaus Copernicus In 1543 Copernicus published On the

Nicolaus Copernicus In 1543 Copernicus published On the Revolution of the Heavenly Spheres, a book based on his 30 -year study of the solar system.

Use the data from all three legs to solve for each triathlete’s average speed.

Constant Speed What is the jogger's speed?

Changing Speed The graph shows how the speed of a jogger varies during her second day of training. What are the rise, the run, and the slope for each segment of the graph?

Acceleration The airplane is accelerating at a rate of 8 m/s 2. Determine the speed of the airplane at 4. 0 s and 5. 0 s. 0 m/s 8 m/s 16 m/s 24 m/s

Deceleration The airplane touches down with a speed of 70 m/s. It decelerates at a rate of -5 m/s 2. Determine its speed after each second of its deceleration.

Net Force The change in motion of an object is determined by the net force acting on the object. What is the net force for each situation?

Which of these three arrows represents the correct amount of net force of the above two arrows?

Types of Friction acts opposite the direction of motion. Determine the frictional force at work.

Frictions Give five examples for sliding, static, fluid, and rolling frictions.

Gravitational Attraction Gravitational attraction depends on two factors: mass and distance. Compare the gravitational force between different planets and their sun.

Weight and Mass The Mars Phoenix Lander weighs about 3, 400 N on Earth. It weighs about 1, 300 N on Mars. If the dog weighs 60 N on Earth, what would he weigh on Mars and the moon?

Newton’s Second Law Suppose that four dogs pull a sled carrying two people. How can the picture-stories be completed to represent answers to the two different questions?

Action-Reaction Forces How can the illustration of the dogs be completed to represent Newton's Third Law of Motion?

What Makes a Bug Go Splat? Splat! A bug has just flown into the windshield of an oncoming car. The car must have hit the bug much harder than the bug hit the car, right?