alleryPower is defined as the:
- amount of work done
- force per unit area
- rate of doing work (or rate of energy transfer)
- mass times acceleration
Show answer and solution
Correct answer: C. rate of doing work (or rate of energy transfer)
Power = work/time.
AP Physics 1 Unit 1B: Kinematics: 2D Motion & Projectiles — practice questions — page 2
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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Showing questions 31–60 of 92.
Power is defined as the:Read the answer and worked solution →The SI unit of power is the:Read the answer and worked solution →1 horsepower is approximately equal to:Read the answer and worked solution →If 600 J of work is done in 30 s, the power developed is:Read the answer and worked solution →1 kilowatt-hour (the commercial unit of electrical energy) equals:Read the answer and worked solution →Mechanical advantage (MA) of a machine equals:Read the answer and worked solution →For an ideal (frictionless) machine, the work output equals:Read the answer and worked solution →The efficiency of a real machine is always:Read the answer and worked solution →A lever in which the fulcrum lies between the load and the effort is a:Read the answer and worked solution →Examples of simple machines include all of the following EXCEPT:Read the answer and worked solution →A 50 N load is lifted by an ideal machine using an effort of 10 N. The mechanical advantage is:Read the answer and worked solution →Newton's first law of motion states that a body continues in its state of rest or of uniform motion in a straight line unless acted upon by:Read the answer and worked solution →The tendency of a body to oppose any change in its state of rest or of uniform motion is called:Read the answer and worked solution →A quantitative measure of inertia of a body is its:Read the answer and worked solution →Linear momentum of a particle of mass m moving with velocity v is defined as:Read the answer and worked solution →Newton's second law of motion gives the relation:Read the answer and worked solution →The SI unit of force is:Read the answer and worked solution →Impulse of a force is equal to the:Read the answer and worked solution →Newton's third law states that to every action there is an:Read the answer and worked solution →Action and reaction forces in Newton's third law:Read the answer and worked solution →For a system of particles with no external force, the total linear momentum is:Read the answer and worked solution →A bullet of mass 10 g is fired from a gun of mass 5 kg with a muzzle velocity of 400 m/s. The recoil speed of the gun is:Read the answer and worked solution →A force of 10 N acts on a body of mass 2 kg for 5 s. The change in its momentum is:Read the answer and worked solution →The acceleration produced by a 20 N force on a 4 kg body is:Read the answer and worked solution →A body is in equilibrium when the net force acting on it is:Read the answer and worked solution →Frictional force between two surfaces in contact at rest, up to a certain limit, is:Read the answer and worked solution →The maximum value of static friction is:Read the answer and worked solution →Kinetic friction acts on a body that is:Read the answer and worked solution →For most surfaces, coefficient of static friction μ_s and kinetic friction μ_k satisfy:Read the answer and worked solution →The minimum angle of inclination at which a body just begins to slide is called the:Read the answer and worked solution →
Worked practice questions
The SI unit of power is the:
- joule
- watt
- newton
- pascal
Show answer and solution
Correct answer: B. watt
1 W = 1 J/s.
1 horsepower is approximately equal to:
- 75 W
- 100 W
- 746 W
- 1000 W
Show answer and solution
Correct answer: C. 746 W
1 hp ≈ 746 W.
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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