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AP Physics 1 Unit 2B: Friction, Gravitational and Normal Forces — practice questions — page 3

Explore 92 free Unit 2B: Friction, Gravitational and Normal Forces questions in AP Physics 1 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 2B: Friction, Gravitational and Normal Forces questions and exercises with answers

Showing questions 61–90 of 92.

As per your syllabus, the diameter of a hydrogen atom (≈ 1.06 × 10⁻¹⁰ m) has order of magnitude equal to which value?Read the answer and worked solution →As per your syllabus, rule, exact integers (like 2 in s = 2πr or n in T = t/n) have how many significant figures?Read the answer and worked solution →As per your syllabus, the digit 0 conventionally placed to the LEFT of the decimal in numbers < 1 (e.g. 0.1250) is which?Read the answer and worked solution →As per your syllabus, Ex 1.2, 5.74 g of substance in 1.2 cm³ gives a density of which value to correct significant figures?Read the answer and worked solution →As per your syllabus, the sum 436.32 g + 227.2 g + 0.301 g = 663.821 g should be reported as which value?Read the answer and worked solution →As per your syllabus, the number 2.746 rounded to THREE significant figures is which?Read the answer and worked solution →As per your syllabus, the number 2.745 rounded to THREE significant figures is which?Read the answer and worked solution →As per your syllabus, the number 2.735 rounded to THREE significant figures becomes which?Read the answer and worked solution →As per your syllabus, Ex 1.1, the surface area of a cube of side 7.203 m to appropriate significant figures is which?Read the answer and worked solution →As per your syllabus, Ex 1, the area of a rectangle 16.2 cm × 10.1 cm with each ±0.1 cm uncertainty is approximately which?Read the answer and worked solution →As per your syllabus, the relative error in a measurement of 1.02 g with ±0.01 g uncertainty is approximately which percentage?Read the answer and worked solution →As per your syllabus, in 12.9 g − 7.06 g (each to 3 significant figures), the result must be reported as which?Read the answer and worked solution →As per your syllabus, in multi-step calculations one should retain how many EXTRA digits in intermediate steps?Read the answer and worked solution →As per your syllabus, the dimensional formula of FORCE is which?Read the answer and worked solution →As per your syllabus, the dimensional formula of ENERGY (joule) is which?Read the answer and worked solution →As per your syllabus, the dimensional formula of MASS DENSITY is which?Read the answer and worked solution →As per your syllabus, the dimensional formula of VELOCITY is which?Read the answer and worked solution →As per your syllabus, two physical quantities can be added or subtracted only if which condition holds?Read the answer and worked solution →As per your syllabus, Ex 1.4, which formula for kinetic energy is dimensionally INCORRECT?Read the answer and worked solution →As per your syllabus, a DIMENSIONALLY CORRECT equation is necessarily which?Read the answer and worked solution →As per your syllabus, Ex 1.5, the period of a simple pendulum T derived from dimensional analysis (l, g, m) gives which form?Read the answer and worked solution →As per your syllabus, the dimensions of PRESSURE are which?Read the answer and worked solution →As per your syllabus, ANGLE has which dimensions, since it is the ratio of two lengths (arc/radius)?Read the answer and worked solution →As per your syllabus, eqn 6.1, the centre of mass of two particles m₁ at x₁ and m₂ at x₂ is which?Read the answer and worked solution →As per your syllabus, the centre of mass of THREE equal masses placed at the vertices of a triangle lies at which point?Read the answer and worked solution →As per your syllabus, the centre of mass of a UNIFORM (homogeneous) symmetric body lies at which location?Read the answer and worked solution →As per your syllabus, eqn 6.11, the equation of motion of the centre of mass of a system of particles is which?Read the answer and worked solution →As per your syllabus, the total LINEAR MOMENTUM of a system of particles equals which?Read the answer and worked solution →As per your syllabus, if F_ext on the system is zero, the total linear momentum of the system does which?Read the answer and worked solution →As per your syllabus, the CM of a continuous distribution is given by which integral?Read the answer and worked solution →

Worked practice questions

As per your syllabus, the diameter of a hydrogen atom (≈ 1.06 × 10⁻¹⁰ m) has order of magnitude equal to which value?

  1. -11
  2. -8
  3. -10
  4. -9
Show answer and solution

Correct answer: C. -10

Your syllabus: a = 1.06 ≤ 5, so 10⁻¹⁰ m. Order of magnitude = -10.

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As per your syllabus, rule, exact integers (like 2 in s = 2πr or n in T = t/n) have how many significant figures?

  1. Same as the next number
  2. Infinite
  3. Zero
  4. One
Show answer and solution

Correct answer: B. Infinite

syllabus rule 6: exact constants and counting integers are not measured and have infinite SF.

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As per your syllabus, the digit 0 conventionally placed to the LEFT of the decimal in numbers < 1 (e.g. 0.1250) is which?

  1. Significant only in mass
  2. Sometimes significant
  3. Always significant
  4. Never significant
Show answer and solution

Correct answer: D. Never significant

syllabus rule 5: the leading 0 before the decimal point of a fractional number is never significant.

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More Physics topics

Unit 8: Fluids: Density, Buoyancy and ContinuityUnit 1B: Kinematics: 2D Motion & ProjectilesUnit 1C: Kinematics: Relative & Circular MotionUnit 2A: Newton's Laws and Translational EquilibriumUnit 3A: Work and Kinetic Energy TheoremUnit 3B: Potential Energy & Conservation of EnergyUnit 4A: Linear Momentum and ImpulseUnit 4B: Conservation of Linear Momentum & Collisions