Gravity is a . O velocity
O speed
O force
O weight
14. If an equal force acts on each of the following objects, which will have the greatest
acceleration?
O a golf ball
O a soccer ball
O a football
O a baseball
15. Inertia explains why .
O friction can be overcome for all objects
O people in a car move forward in their seats when the car stops quickly
O gravitational forces are stronger on Earth than on the Moon
O the ground pushes against your feet when you run.
16. An object is accelerated when it is acted on by .
O an unbalanced force
O a balanced force
O velocity
O inertia
17. In which situation are the forces operating on an object unbalanced?
O A stack of books rests on a table.
O A car has a constant motion of 60 miles per hour.
O Two sides of a balance both support 20 kg.
O A baseball falls at a faster and faster speed.
18. Which of the following is NOT a force?
O Newton
O Gravity
O Friction
O Inertia