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AP Physics 1 Dynamics: Force and Newton's Laws of Motion — practice questions

Explore 53 free Dynamics: Force and Newton's Laws of Motion questions in AP Physics 1 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Dynamics: Force and Newton's Laws of Motion questions and exercises with answers

Showing questions 1–30 of 53.

Newton's first law says a body at rest stays at rest unless acted on by:Read the answer and worked solution →The property of a body to stay at rest or keep moving at constant velocity is called:Read the answer and worked solution →A push or a pull is a vector quantity because it has magnitude and:Read the answer and worked solution →Newton's second law says acceleration is directly proportional to net external force and:Read the answer and worked solution →The SI unit of force is the newton, defined as the force needed to accelerate:Read the answer and worked solution →Weight is a downward force, so weight equals mass multiplied by:Read the answer and worked solution →An object sliding across a table slows down because of the net force of:Read the answer and worked solution →On an air hockey table with the air turned on, the puck glides far without slowing because the surface is:Read the answer and worked solution →Only which kind of force affects the motion of a system?Read the answer and worked solution →Newton's third law states that if one object exerts a force on a second, the second exerts a force that is:Read the answer and worked solution →A force exerted on an object is always due to:Read the answer and worked solution →The diagram that shows only the external forces acting on one body is called a:Read the answer and worked solution →A gravitational field g at an object's location exerts a force whose magnitude is:Read the answer and worked solution →The weight of a 1.0 kilogram object on Earth is about:Read the answer and worked solution →Weight is not an intrinsic property of an object because:Read the answer and worked solution →When NASA speaks of weightlessness and microgravity, physics calls the same phenomenon:Read the answer and worked solution →Objects falling toward Earth are never truly in free-fall in the real world because:Read the answer and worked solution →How many basic forces are now taken to account for all known phenomena?Read the answer and worked solution →Which of Newton's laws is it?Read the answer and worked solution →Mass or weight?Read the answer and worked solution →True or false: forces and motionRead the answer and worked solution →Work the force numbersRead the answer and worked solution →Complete Newton's lawsRead the answer and worked solution →Kinematics only describes how objects move. The study of the forces that cause motion is:Read the answer and worked solution →A force is a push or pull that has both magnitude and direction, so it is a:Read the answer and worked solution →A diagram showing a body as a single point with only the external forces acting on it is a:Read the answer and worked solution →A stretched spring pulling back to its relaxed shape exerts a:Read the answer and worked solution →A hockey puck glides far on an air table because friction is nearly gone. This illustrates Newton's:Read the answer and worked solution →The property of a body to remain at rest or keep moving at constant velocity is called:Read the answer and worked solution →Inertia is measured by an object's:Read the answer and worked solution →

Worked practice questions

Newton's first law says a body at rest stays at rest unless acted on by:

  1. A net external force
  2. Any internal force
  3. A constant velocity
  4. An equal reaction
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Correct answer: A. A net external force

1. Everyday experience suggests moving things naturally slow down and stop. 2. Newton's first law states that a body at rest remains at rest, or, if in motion, remains in motion at a constant velocity unless acted on by a net external force. 3. So a change in velocity always needs a cause. 4. Internal forces cancel within a system and cannot change its motion. _Source: OpenStax College Physics for AP(R) Courses 2e (CC BY 4.0), Ch 4 'Dynamics: Force and Newton's Laws of Motion', sections 4.1-4.8_

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The property of a body to stay at rest or keep moving at constant velocity is called:

  1. Tension
  2. Inertia
  3. Momentum
  4. Friction
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Correct answer: B. Inertia

1. Newton's first law describes a tendency rather than a force. 2. The property of a body to remain at rest or to remain in motion with constant velocity is called inertia. 3. Mass is the quantitative measure of that property. 4. Momentum instead combines mass with a particular velocity. _Source: OpenStax College Physics for AP(R) Courses 2e (CC BY 4.0), Ch 4 'Dynamics: Force and Newton's Laws of Motion', sections 4.1-4.8_

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A push or a pull is a vector quantity because it has magnitude and:

  1. A direction
  2. A duration
  3. Temperature
  4. Its density
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Correct answer: A. A direction

1. Forces are represented by arrows for a reason. 2. A push or pull has both magnitude and direction, therefore it is a vector quantity. 3. It can also vary considerably in each regard. 4. Earth exerts a huge pull on a planet but only a tiny downward pull on a flea. _Source: OpenStax College Physics for AP(R) Courses 2e (CC BY 4.0), Ch 4 'Dynamics: Force and Newton's Laws of Motion', sections 4.1-4.8_

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