kwizNET Subscribers, please login to turn off the Ads!
Email us to get an instant 20% discount on highly effective K-12 Math & English kwizNET Programs!

Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 5 - English Language
3.16 Comprehension: Newton's Laws of Motion

Directions: Read the following text and answer the questions.

Newton's Laws of Motion

The motion of an aircraft through the air can be explained and described by physical principals discovered over 300 years ago by Sir Isaac Newton. Newton worked in many areas of mathematics and physics. He developed the theories of gravitation in 1666, when he was only 23 years old. Some twenty years later, in 1686, he presented his three laws of motion in the "Principia Mathematica Philosophiae Naturalis."

Newton's first law states that every object remains at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. The key point here is that if there is no net force acting on an object (if all the external forces cancel each other out) then the object maintains a constant velocity. Prior to Newton's investigation, people believed that one needed to constantly apply a force to maintain a constant velocity. Newton's law states quite the opposite; no force is needed to maintain a constant velocity. Forces produce a change in velocity not the velocity itself. If all external forces are balanced and the velocity is zero, then the object remains at rest. If an external force is applied, the velocity changes because of the force.

The second law explains how the velocity changes. The law defines a force to be equal to change in momentum (mass times velocity) per change in time. For an object with a constant mass, the second law can be more easily expressed as the product of an object's mass and it's acceleration.

F = m * a

Acceleration is the change in velocity with change in time. For a constant external applied force, the acceleration is inversely proportional to the mass. For the same force, a lighter object has a higher acceleration than a heavier object. A force causes a change in velocity; and likewise, a change in velocity generates a force. The equation works both ways.

The third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal force on object A. Note that the forces are exerted on different objects. The third law can be used to explain the generation of lift by a wing and the production of thrust by a propeller.

Q 1: How many laws of motion did Newton discover?

Q 2: Newton's first law of motion defines

Q 3: Which law says that an object that is at rest will continue to stay at rest until an external force is applied to it?
Law of Rest
Newton's 1st Law of Motion
Newton's 2nd Law of Motion
Newton's 3rd Law of Motion

Q 4: Newton was born in

Q 5: What is momentum?
a measure of time
velocity (speed)
mass times velocity

Q 6: Newton's third law tells you that
You need a force to move an object that is at rest
action and reaction act on the same object
when a bat hits a ball with a force, the ball exerts the same force on the bat!
Force = Mass * Acceleration

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!

Subscription to kwizNET Learning System offers the following benefits:

  • Unrestricted access to grade appropriate lessons, quizzes, & printable worksheets
  • Instant scoring of online quizzes
  • Progress tracking and award certificates to keep your student motivated
  • Unlimited practice with auto-generated 'WIZ MATH' quizzes
  • Child-friendly website with no advertisements
  • Choice of Math, English, Science, & Social Studies Curriculums
  • Excellent value for K-12 and ACT, SAT, & TOEFL Test Preparation
  • Get discount offers by sending an email to

Quiz Timer