Question

1. what are the two things you need to know in order to calculate an objects speed?
2. everything on earth falls at what rate?
3. what is inertia? the tendency for objects to remain in motion or stay at rest.
4. if jupiter has the most gravity (24.79 m/s/s), and the moon has the least gravity (1.62 m/s/s), where would a rock fall the fastest? i
5. what does newtons first law of motion state?
6. what is another name for newtons first law?
7. does newtons first law apply to objects that are in motion, at rest, or both?
8. what is the formula for newtons 2nd law of motion?
9. you should wear your seat belt because of which of newtons 3 laws?

Explanation:

1. The formula for speed is \(v=\frac{d}{t}\), where \(v\) is speed, \(d\) is distance, and \(t\) is time. So, you need to know the distance an object travels and the time it takes to travel that distance.
2. In the absence of air resistance, everything on Earth falls at an acceleration rate of approximately \(9.8\ m/s^{2}\) (due to Earth's gravity).
3. Inertia is defined as the tendency for objects to remain in motion or stay at rest.
4. The greater the gravitational acceleration, the faster an object will fall. Since Jupiter has a higher gravitational acceleration (\(24.79\ m/s^{2}\)) compared to the Moon (\(1.62\ m/s^{2}\)), a rock will fall fastest on Jupiter.
5. Newton's first law of motion states that an object at rest will stay at rest and an object in motion will stay in motion with a constant velocity (in a straight line) unless acted upon by an unbalanced force.
6. Another name for Newton's first law is the law of inertia.
7. Newton's first law applies to both objects in motion and at rest. For objects at rest, they remain at rest (a state of zero velocity) unless a force acts. For objects in motion, they maintain their state of motion (constant velocity) unless a force acts.
8. The formula for Newton's 2nd law of motion is \(F = ma\), where \(F\) is force, \(m\) is mass, and \(a\) is acceleration.
9. You should wear your seat - belt because of Newton's first law. When a car suddenly stops (a force acts on the car), your body (due to inertia) will tend to keep moving forward. The seat - belt provides an unbalanced force to stop your body's forward motion.

Answer:

1. Distance and time.
2. Approximately \(9.8\ m/s^{2}\).
3. The tendency for objects to remain in motion or stay at rest.
4. On Jupiter.
5. An object at rest will stay at rest and an object in motion will stay in motion with a constant velocity (in a straight line) unless acted upon by an unbalanced force.
6. Law of inertia.
7. Both.
8. \(F = ma\).
9. Newton's first law.