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AP Physics 1 Unit 1B: Kinematics: 2D Motion & Projectiles — practice questions — page 3

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 61–90 of 92.

For an object in uniform circular motion, the net force is directed:Read the answer and worked solution →The magnitude of the centripetal force on a body of mass m moving with speed v in a circle of radius r is:Read the answer and worked solution →On a level road, the maximum speed at which a car can take a circular turn of radius r without skidding is:Read the answer and worked solution →On a banked road (angle θ, neglecting friction), the optimum speed for radius r is:Read the answer and worked solution →A passenger inside a uniformly accelerating bus appears to be pushed backward. This apparent force is a:Read the answer and worked solution →Tension in a string is the same throughout its length if the string is:Read the answer and worked solution →A 5 kg block on a frictionless horizontal surface is pulled by a horizontal force of 25 N. Its acceleration is:Read the answer and worked solution →A man weighs 60 kg in an elevator. The elevator accelerates upward at 2 m/s² (g = 10 m/s²). The apparent weight is:Read the answer and worked solution →A man of mass 60 kg in a freely falling lift experiences an apparent weight of:Read the answer and worked solution →Newton's second law in vector form is most generally written as:Read the answer and worked solution →The work done by a constant force F displacing a body by s with angle θ between them is:Read the answer and worked solution →Work done by a force perpendicular to the displacement is:Read the answer and worked solution →The work-energy theorem states that the net work done on a particle equals the:Read the answer and worked solution →The kinetic energy of a body of mass m moving with speed v is:Read the answer and worked solution →If the momentum of a body is doubled, its kinetic energy becomes:Read the answer and worked solution →For a conservative force, the work done in a closed path is:Read the answer and worked solution →For a conservative force F(x), the relation to potential energy U(x) is:Read the answer and worked solution →The potential energy stored in a spring of stiffness k stretched by x is:Read the answer and worked solution →A spring is stretched by 0.1 m; its stiffness is 200 N/m. The energy stored is:Read the answer and worked solution →In an elastic collision between two bodies:Read the answer and worked solution →In a perfectly inelastic collision, the bodies after collision:Read the answer and worked solution →The coefficient of restitution e for a perfectly elastic 1-D collision is:Read the answer and worked solution →Power is defined as the:Read the answer and worked solution →The SI unit of power is:Read the answer and worked solution →Instantaneous power of a force F acting on a particle moving with velocity v is:Read the answer and worked solution →1 kWh in joules is:Read the answer and worked solution →A pump lifts 100 kg of water through 10 m in 5 s (g = 10 m/s²). The power developed is:Read the answer and worked solution →The energy possessed by a body by virtue of its configuration is called:Read the answer and worked solution →Gravitational potential energy near Earth's surface for height h is:Read the answer and worked solution →For a freely falling body, as it descends, what remains constant (no air drag)?Read the answer and worked solution →

Worked practice questions

For an object in uniform circular motion, the net force is directed:

  1. along the velocity
  2. along the radius outward
  3. opposite to velocity
  4. along the radius toward the centre
Show answer and solution

Correct answer: D. along the radius toward the centre

Centripetal force points toward the centre.

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The magnitude of the centripetal force on a body of mass m moving with speed v in a circle of radius r is:

  1. mvr
  2. mv/r
  3. m/(vr)
  4. mv²/r
Show answer and solution

Correct answer: D. mv²/r

F_c = mv²/r.

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On a level road, the maximum speed at which a car can take a circular turn of radius r without skidding is:

  1. √(gr)
  2. √(μgr)
  3. μgr
  4. gr/μ
Show answer and solution

Correct answer: B. √(μgr)

Friction supplies centripetal force: μmg ≥ mv²/r ⇒ v_max = √(μgr).

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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