You view the motion of a hockey puck in a video and mark its location every 0.2 s. The resulting motion map for three different hockey pucks is shown below. The hockey puck in each case is moving to the right.
In which case (A, B, or C) is there no interaction between the hockey puck and its surroundings? (Or rather, no net interaction.) If there is no interaction in all or none of the cases, then state so. Explain your reasoning.
You view the motion of a hockey puck in a video and mark its location every 0.2 s. The resulting image for three different hockey pucks is shown below. The hockey puck in each case is moving to the right. The gridlines in the images are 1 cm apart.
Near-Earth asteroids are carefully tracked by NASA so that Earthlings will have some notice in the case of a catastrophic collision. You can following the tracking of near-Earth asteroids at
Suppose that in a simulation of Asteroid 2007 TU24, it is at the location km relative to the center of Earth with a velocity km/s at some clock reading. What will be its (approximate) position 1 hour later?
Note: Asteroid TU24 made its closest approach to Earth on January 29, 2008. You can read more about it at:
A graduate student in biology is analyzing video of a school of fish and measures a certain fish to be at the position m moving with a velocity m/s at some instant. Approximately where will the fish be 0.100 s later?
At some instant in time, Earth is located at the position m relative to Sun. Its velocity at this instant is m/s in the +y direction.
A golf ball rolls across the green toward the hole as shown below. Due to the grass and the slope of the green, it breaks toward the hole.
The positions of the golf ball at each second as it rolls toward the hole are given below.
Table: Positions and clock readings for the golf ball
A GPS collar is used to track the movement of elephants in Timbuktu. (See the article at
for more information about the use of GPS to learn about migration patterns of animals.) The position of a single elephant can be downloaded every 30 minutes. At 8:00 AM, data shows that the elephant is at the position km (relative to some origin). At noon, the elephant is at km.
The longest edge of a sail on a sailboat extends from the top of the mast (the origin) to a location . A picture is shown below.
The following forces act on an object at some instant of time.
The picture shows a 0.4-kg football after it is thrown. The ball is traveling from left to right in the picture. On the picture, sketch the initial position vector , the final position vector and the displacement vector for the football.