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AP Intermediate 1st Year Laws of Motion — practice questions

Explore 87 free Laws of Motion questions in AP Intermediate 1st Year Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Laws of Motion questions and exercises with answers

Showing questions 1–30 of 87.

Newton's first law of motion is also known as the law ofRead the answer and worked solution →A cricket ball of mass 150 g moving at (3i+4j) m/s is hit to -(3i+4j) m/s. The magnitude of momentum change isRead the answer and worked solution →Conservation of linear momentum in a collision follows directly fromRead the answer and worked solution →A force F acts on a 2 kg body for 3 s, changing its speed from 2 m/s to 8 m/s along the line of F. The magnitude of F isRead the answer and worked solution →The maximum static friction force on a body is f = μN. Static friction is best described asRead the answer and worked solution →A 10 kg block on a frictionless surface is pulled by 20 N horizontally and 20 N at 60° above horizontal. The horizontal acceleration isRead the answer and worked solution →Impulse equalsRead the answer and worked solution →A body in equilibrium under several forces hasRead the answer and worked solution →A 0.5 kg ball hits a wall at 10 m/s and rebounds at 10 m/s. The impulse on the ball isRead the answer and worked solution →Newton's second law in vector form isRead the answer and worked solution →A lift accelerates upward at 2 m/s². The apparent weight of a 50 kg person (g=10) isRead the answer and worked solution →Two blocks of 2 kg and 3 kg connected by a string are pulled by 10 N on the 3 kg block (frictionless). The acceleration isRead the answer and worked solution →The SI unit of force, the newton, equalsRead the answer and worked solution →As per your syllabus, Aristotle's fallacy held that a force is required for which condition?Read the answer and worked solution →As per your syllabus, a ball released on a frictionless incline rises on the other side to which height?Read the answer and worked solution →As per your syllabus, INERTIA of a body is best described as which property?Read the answer and worked solution →As per your syllabus, Newton's FIRST law states which of the following?Read the answer and worked solution →As per your syllabus, the QUANTITATIVE measure of inertia of a body is which physical quantity?Read the answer and worked solution →As per your syllabus, the momentum p of a body of mass m moving with velocity v is which?Read the answer and worked solution →As per your syllabus, momentum p is a vector with direction along which vector?Read the answer and worked solution →As per your syllabus, why is a SHORTER stopping time more painful when catching a cricket ball?Read the answer and worked solution →As per your syllabus, when a stationary bus suddenly starts, passengers are jerked backward primarily because of which property?Read the answer and worked solution →As per your syllabus, a body moving on it must do which?Read the answer and worked solution →As per your syllabus, the SI unit of momentum is which?Read the answer and worked solution →As per your syllabus, Newton's SECOND law in SI units states which relation?Read the answer and worked solution →As per your syllabus, the SI unit of force is the newton, with one newton equal to which value?Read the answer and worked solution →As per your syllabus, the IMPULSE J of a force F acting for time Δt equals which quantity?Read the answer and worked solution →As per your syllabus, an IMPULSIVE FORCE is best described by which feature?Read the answer and worked solution →As per your syllabus, a 0.15 kg cricket ball at 12 m/s is hit back at 12 m/s along the same line. The impulse imparted is which value?Read the answer and worked solution →As per your syllabus, the dimensions of FORCE are which set?Read the answer and worked solution →

Worked practice questions

Newton's first law of motion is also known as the law of

  1. acceleration
  2. action-reaction
  3. inertia
  4. gravitation
Show answer and solution

Correct answer: C. inertia

The first law (a body stays at rest or in uniform motion unless acted on by a net force) defines inertia.

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A cricket ball of mass 150 g moving at (3i+4j) m/s is hit to -(3i+4j) m/s. The magnitude of momentum change is

  1. 0
  2. 3.0 kg·m/s
  3. 1.5 kg·m/s
  4. 0.75 kg·m/s
Show answer and solution

Correct answer: C. 1.5 kg·m/s

We have Δp = m(v−u). That is Δp = 0.15·(−2)(3i+4j). So Δp = −0.3(3i+4j). |Δp| = 0.3·√(9+16) = 0.3·5 = 1.5 kg·m/s.

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Conservation of linear momentum in a collision follows directly from

  1. Newton's third law
  2. conservation of energy
  3. the law of gravitation
  4. Newton's first law only
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Correct answer: A. Newton's third law

Equal-and-opposite internal forces (third law) make the total momentum change zero, so momentum is conserved.

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