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

1. The diagram shows the mass of 3 objects at rest, as well as a vector indicating the force applied on each object. Which of the objects shown above will undergo the greatest acceleration?

• Object A
• Object B
• Object C
• All will undergo the same acceleration
• None of the objects will accelerate

2. The diagram below illustrates the applied force on object B. Determine the magnitude of the friction force vector needed to bring the object to a stop.

• 
• 
• 
• 

3. The 3 objects shown above are all taken to space. On a spacewalk, an astronaut applies the forces as illustrated. Which of the objects will come to a stop first?

• Object A
• Object B
• Object C
• All will continue indefinitely
• None of the objects will move

4. A researcher is studying the force produced by athletes when they are playing their sport. Below is a table of the data collected so far. Use your knowledge of the relationship between mass, acceleration, and force to determine the missing values.

• Ping pong=0.00027, Softball=50, Tennis=.57
• Ping pong=0.27, Softball=.050, Tennis.=.057
• Ping pong=0.0027, Softball=50, Tennis=5.7
• Ping pong=0.0027, Softball=1.6, Tennis=2065

5. As shown below, a bus (mass = 11,000kg) collides with a flying bug (mass = 0.002kg). The force of the windshield on the bug is 60,000 N. The force of the bug on the windshield is _______ the force of the windshield on the bug.

• greater than
• equal to
• less than