Physical Science Chapter 11 Test Review
1. Two children fight over a toy, pulling in opposite directions. The first pulls East with a force of 20N. The second
child pulls West with a force of 40N. What is the net force on the toy?
a. 20 N West
2. A net force will cause an object to
a. Accelerate (speed up, slow down, change direction)
3. A Newton is a unit of _________________ and is equal to 1 ________________.
a. Force; kg-m/s
4. Newton’s First Law is also called the Law of _______________.
a. Inertia
5. In order to find the force of an object, you must know its
a. Mass and acceleration
6. According to Newton’s First Law, a book on a shelf will stay put unless
a. A net force or unbalanced force acts on it
7. According to Newton’s First Law, a ball rolling down the street would roll forever. In reality, the ball stops
because
a. A net force (friction) acts on the ball
8. According to Newton’s Second Law, force can be increased by
a. Increasing mass or increasing acceleration
9. A kid stands on a skateboard and throws a baseball to a friend. According to Newton’s Third Law, the skateboard
will
a. Move backwards away from the throw with a force equal to the throw
10. A pencil is dropped on the floor. According to Newton’s Third Law, the floor and pencil
a. Hit each other with equal and opposite forces
11. A Ninja karate chops a brick. What is the action force?
a. Ninja’s hand on the brick
12. You and a friend decide to go to Target and have a shopping cart race. When planning your strategy, you decide
to choose an empty cart because
a. Less mass means less inertia, which makes the cart easier to accelerate (speed up, slow down, change
direction)
13. Anything with mass has
a. gravity
14. As you get closer to Earth’s surface, the force of ____________ becomes stronger.
a. gravity
15. In a plane, you weigh less because
a. You are farther from earth’s surface and gravity is less
16. A soccer player kicks a ball. The reaction force is
a. Ball’s force on the kicker’s foot
17. By the year 2050, families will vacation on the moon. While on vacation with your children, you will
a. Have the same mass but weigh less
18. A __________________ is a unit of weight and a _______________ is a unit of mass.
a. Newton, kilogram (or gram, milligram)
19. An elephant and his friend the mouse go sky diving together on the moon. Since there is no air resistance, the
a. Elephant and mouse hit the surface together
20. The elephant and mouse return to earth and skydive again. When the pull of gravity balances their air
resistance,
a. They reach their terminal velocity.
21. As the mass of an object increases, its _______________ also increases.
a. gravity
22. As the distance between objects decreases, the ___________________ increases.
a. gravity
23. What is a unit of mass?
a. Kilogram, gram, miligram
24. What is a unit of velocity?
a. M/s; km/hr, etc
25. Which is a unit of acceleration?
a. m/s2, km/hr2
26. Which is a unit of force?
a. Newton, kg-m/s2
27. Which unit describes how far?
a. Distance (km, m, cm)
28. Which unit describes how fast?
a. Velocity (m/s, km/hr, etc)
29. Which unit would label weight?
a. Newton, kg-m/s2
30. Which unit labels momentum?
a. Kg-m/s