Day 1: Start 1. The opening scene shows the Space Shuttle Explorer in orbit around the earth.But it is moving at a steady pace, with no slowing down at all. Why is this? Which of Newton's Laws applies, 1,2, or 3? 2. The jetpack that Matt Kowalski is wearing operates on short bursts of gas to directions. (Notice the quick puffs of gas as he maneuvers ) Which of Newton's Laws applies, 1,2, or 3? 3. In a weightless environment, there is no up or down. On Earth, the force of __ helps us to orientate ourselves and tells us which way is up or down.

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Day 1: Start 1. The opening scene shows the Space Shuttle Explorer in orbit around the earth.But it is moving at a steady pace, with no slowing down at all. Why is this? Which of Newton's Laws applies, 1,2, or 3? 2. The jetpack that Matt Kowalski is wearing operates on short bursts of gas to directions. (Notice the quick puffs of gas as he maneuvers ) Which of Newton's Laws applies, 1,2, or 3? 3. In a weightless environment, there is no up or down. On Earth, the force of __ helps us to orientate ourselves and tells us which way is up or down.

Answer 1

For the steady motion of the Space Shuttle Explorer, Newton's First Law applies which suggests that an object in motion stays in motion, meaning it would continue moving in a straight line unless acted upon by a non-zero force. In reference to Matt Kowalski's jet pack, it operates on Newton's Third Law which states that every action has an equal and opposite reaction - the expulsion of gas propelling him forward. His movement and ability to orient himself illustrates Newton's Second Law - a body's force is equal to its mass times its acceleration.

Answer 2

## Step 1: The Space Shuttle Explorer's steady motion in orbit around the Earth without slowing down is represented by Newton's First Law which is also known as the law of inertia. According to this law, a body continues to maintain its state of rest or of uniform motion until it is acted upon by an external unbalanced force. Once the space shuttle has been set into motion in space, there are no significant resistive forces like air resistance to slow it down, thus it maintains a uniform motion unless a different force acts upon it. ## Step 2: The operation of Matt Kowalski's jet pack relies upon Newton's Third Law, commonly coined as 'every action has an equal and opposite reaction'. The short bursts or puffs of gas expelled from the jet pack in one direction results in an equal and opposite force propelling Kowalski in the desired direction. This operation utilizes the principle that the outflow of gas generates a reaction force which assists in maneuvering in space. ## Step 3: In a weightless environment, the absence of forceful directional indication such as gravity makes navigation difficult regarding the concepts of 'up' and 'down', which are determinant by the force of gravity on Earth. The use of thrusters to correctly orient oneself in space modifies the purely inertial motion by providing external forces needed to change the direction, velocity or cessation of motion, demonstrating Newton's Second Law of Motion (Force=mass×acceleration or F=ma), as exerting a force on a body results in its acceleration or change in motion.

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