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AP Physics 1 Unit 1B: Kinematics: 2D Motion & Projectiles — practice questions

Explore 92 free Unit 1B: Kinematics: 2D Motion & Projectiles 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 1B: Kinematics: 2D Motion & Projectiles questions and exercises with answers

Showing questions 1–30 of 92.

Sound of frequency above the human audible range is called:Read the answer and worked solution →Sound of frequency below 20 Hz is called:Read the answer and worked solution →Speed of sound is generally greatest in:Read the answer and worked solution →At ordinary room temperature, the speed of sound in air is approximately:Read the answer and worked solution →The speed of sound in a gas increases when:Read the answer and worked solution →The reflection of sound from a distant obstacle that is heard distinctly after the original is called:Read the answer and worked solution →The persistence of sound in a hall due to repeated reflections is called:Read the answer and worked solution →For a clear echo, the minimum time gap between the original and reflected sound must be about:Read the answer and worked solution →Using v ≈ 340 m/s in air, the minimum distance to a reflecting wall for a clear echo (sound goes and returns in 0.1 s) is about:Read the answer and worked solution →Bats locate prey in the dark mainly using:Read the answer and worked solution →SONAR uses sound waves of which type for locating underwater objects?Read the answer and worked solution →In SONAR, the depth of a sea bed is calculated using:Read the answer and worked solution →Energy can change forms; when a tuning fork vibrates in air it converts mechanical energy mainly into:Read the answer and worked solution →If a force F acts on an object that is displaced by s in the direction of the force, the work done is:Read the answer and worked solution →The SI unit of work is the:Read the answer and worked solution →If the displacement of an object is zero while a force acts on it, the work done by that force is:Read the answer and worked solution →A force acts perpendicular to the displacement of an object. The work done by this force is:Read the answer and worked solution →When the angle between force and displacement is obtuse (greater than 90°), the work done is:Read the answer and worked solution →A man lifting a load against gravity does work that is:Read the answer and worked solution →Energy is defined as the capacity to:Read the answer and worked solution →The SI unit of energy is the same as that of:Read the answer and worked solution →The energy possessed by a body due to its motion is called:Read the answer and worked solution →The kinetic energy of an object of mass m moving with speed v is:Read the answer and worked solution →If the speed of a body is doubled, its kinetic energy becomes:Read the answer and worked solution →The energy possessed by a body by virtue of its position or configuration is called:Read the answer and worked solution →The gravitational potential energy of an object of mass m at height h (near Earth's surface) is:Read the answer and worked solution →A 2 kg ball is lifted to a height of 3 m. Taking g = 10 m/s², the gain in gravitational PE is:Read the answer and worked solution →The kinetic energy of a 2 kg object moving at 5 m/s is:Read the answer and worked solution →The law of conservation of energy states that energy can be:Read the answer and worked solution →For a body falling freely under gravity (no air resistance), as it falls its kinetic energy:Read the answer and worked solution →

Worked practice questions

Sound of frequency above the human audible range is called:

  1. infrasonic
  2. ultrasonic
  3. subsonic
  4. supersonic
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Correct answer: B. ultrasonic

Ultrasonic: >20 kHz; infrasonic: <20 Hz.

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Sound of frequency below 20 Hz is called:

  1. ultrasonic
  2. infrasonic
  3. supersonic
  4. audible
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Correct answer: B. infrasonic

Infrasonic frequencies are below the audible range.

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Speed of sound is generally greatest in:

  1. air
  2. water
  3. solids (e.g., steel)
  4. vacuum
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Correct answer: C. solids (e.g., steel)

Solids have higher elasticity; sound travels fastest in them.

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More Physics topics

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