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1. Which of the following explains why the simple push of a button is difficult in space?

• The force of the button on the astronaut is equal to the force of the astronaut on the button
• Since the astronaut is more massive, the button applies a greater force to the astronaut
• Since the astronaut is more massive, the force of the button accelerates the astronaut more than the button
• The force of gravity on the astronaut is equal to the force the astronaut applies to the button

A football thrown by a professional quarterback goes farther than one thrown by a 10-year old.

• First Law
• Second Law
• Third Law

3. In order to reach outer space, astronauts must use very powerful rockets. Engineers have designed rockets that produce an enormous amount of force, capable of pushing the rocket into orbit. When designing a rocket, engineers make them with _____ because they’ll get _______ acceleration.

• .More mass, greater
• More mass, less
• Less mass, greater
• Less mass, less

4. Here on Earth, we use numerous technologies driven by the laws of motion to keep us safe. In a car collision, the laws of motion allowed engineers to develop airbags. Which of the following does the airbag change about an impact?

• Changes the initial velocity of the car and occupant
• Changes the final velocity of the car and occupant
• Changes the inertia of the occupant during collision
• Changes how long it takes before the occupant hits the car’s dashboard

5. A truck driver, driving at 50 mph, takes their foot off the accelerator. What best explains why the truck comes to a stop, even though the truck has a large inertia?

• The inertia of the truck slows it down
• The inertia of the truck speeds it up
• The force of friction acts in the opposite direction of the truck’s motion
• The force of friction acts in the same direction of the truck’s motion, adding to its inertia