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AP Physics 1 Unit 4A: Linear Momentum and Impulse — practice questions — page 3

Explore 92 free Unit 4A: Linear Momentum and Impulse 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 4A: Linear Momentum and Impulse questions and exercises with answers

Showing questions 61–90 of 92.

Specific gravity is defined as the ratio of an object's density to the density of:Read the answer and worked solution →An object with specific gravity less than one placed in water will:Read the answer and worked solution →A tyre gauge reading 200 kilopascals in an atmosphere of 100 kilopascals means the absolute pressure is:Read the answer and worked solution →Water beads up on a waxed car but spreads on bare paint because of the balance between:Read the answer and worked solution →Pressure in a fluid rises with depth, which is why a container's bottom supports:Read the answer and worked solution →Two objects have equal mass but one has twice the volume. Its density is:Read the answer and worked solution →Match each fluid termRead the answer and worked solution →Work the pressure arithmeticRead the answer and worked solution →True or false: fluid staticsRead the answer and worked solution →Tap what belongs to each ideaRead the answer and worked solution →Complete the fluid rulesRead 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 →A kilogram of cotton balls and a kilogram of gold have:Read the answer and worked solution →Newton's second law states acceleration is directly proportional to net external force and inversely proportional to:Read the answer and worked solution →The newton is the force needed to accelerate a 1 kg system at:Read the answer and worked solution →The weight of a 1.0 kg object on Earth is about:Read the answer and worked solution →On the Moon, where g is 1.625 m/s squared, a 1.0 kg mass weighs about:Read the answer and worked solution →A net force of 51 N pushes a 24 kg lawn mower. Its acceleration is about:Read the answer and worked solution →Whenever one body exerts a force on a second, the first experiences an equal and opposite force. This is Newton's:Read the answer and worked solution →A swimmer pushes on the pool wall and accelerates away. The two equal and opposite forces do not cancel because they act on:Read the answer and worked solution →A rocket moves forward because expelled gas exerts a forward reaction force called:Read the answer and worked solution →The support force perpendicular to a surface of contact is called the:Read the answer and worked solution →On a frictionless incline at angle theta, the acceleration of any mass is:Read the answer and worked solution →A 5.00 kg mass hangs at rest from a rope. The tension in the rope is:Read the answer and worked solution →

Worked practice questions

Specific gravity is defined as the ratio of an object's density to the density of:

  1. Mercury at zero degrees
  2. Ice at zero degrees
  3. Water at four degrees
  4. Air at sea level
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Correct answer: C. Water at four degrees

1. Specific gravity is a comparison, so it needs a reference fluid. 2. It is useful to define the ratio of the density of an object to a fluid, usually water. 3. That ratio is called specific gravity. 4. The reference is the density of water at 4.00 degrees Celsius. _Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 11 'Fluid Statics', sections 11.1-11.9_

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An object with specific gravity less than one placed in water will:

  1. Sink to the bottom
  2. Stay fully suspended
  3. Dissolve completely
  4. Float on the surface
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Correct answer: D. Float on the surface

1. Specific gravity compares the object's density with water's. 2. Specific gravity is the ratio of an object's average density to the density of water. 3. A value below one means the object is less dense than water. 4. If the buoyant force is greater than the object's weight, the object will rise to the surface and float. 5. A less dense object displaces water weighing more than itself, so it floats. _Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 11 'Fluid Statics', sections 11.1-11.9_

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A tyre gauge reading 200 kilopascals in an atmosphere of 100 kilopascals means the absolute pressure is:

  1. 300 kilopascals
  2. 200 kilopascals
  3. 100 kilopascals
  4. Just 2 kilopascals
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Correct answer: A. 300 kilopascals

1. A gauge reading is not the total pressure inside. 2. Gauge pressure is defined to be the pressure relative to atmospheric pressure. 3. The total pressure, or absolute pressure, is the sum of gauge pressure and atmospheric pressure. 4. Here that sum is 200 plus 100 kilopascals. 5. So the absolute pressure is 300 kilopascals. _Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 11 'Fluid Statics', sections 11.1-11.9_

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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 2B: Friction, Gravitational and Normal ForcesUnit 3A: Work and Kinetic Energy TheoremUnit 3B: Potential Energy & Conservation of EnergyUnit 4B: Conservation of Linear Momentum & Collisions