1. Two balls are launched simultaneously from a height of 10 meters. One of them (Ball A) is shot horizontally away from the starting point, while the second (Ball B) drops straight down.
   1. Ball A hits the ground first
   2. Ball B hits the ground first
   3. Ball A and B hit the ...

1. Suppose an astronaut is trapped outside her craft, which is 50 meters away. She throws objects from her pack, enabling her to get back to the craft.

1. What direction should she throw the gear? Draw the situation and the flight of the sacrificed objects.
2. Suppose the objects in her ...

1. Suppose an astronaut is trapped outside her craft, more than 20 meters away. She throws objects from her pack, enabling her to get back to the craft.

1. What direction should she throw the gear? Draw the situation and the flight of the sacrificed objects.
2. Suppose the objects in her ...

1. Two people push on opposite ends of a box (opposing each other). Person 1 exerts a force of $100 N$, while person 2 exerts a force of $70 N$.

1. Draw free body diagrams for the person 1, person 2, and the box, assuming that there is no friction.
2. Make ...

1. A small spacecraft has an engine that can give it a constant acceleration of $1 m/s^2$.
   1. How far will it travel in one hour?
   2. What is the average speed of the craft over that hour?
   3. How far will the craft travel in the second hour of its flight ...

1. What is your average speed if:
   1. you travel at 20 meters per second for 2 minutes, and at 15 meters per second for 2 minutes?
   2. you travel at 20 meters per second for 2 minutes, and at 15 meters per second for 5 minutes?
2. Suppose that the equation $x(t ...

1. In the crash of a fighter jet, an object travelling approximately 700 miles per hour (~350 meters per second) is brought to rest in about 1.5 seconds. What acceleration is required to stop the jet's motion ? What could you compare this number to to get a sense ...