Physics Concepts Quiz

What is a base unit?

• A unit that has both magnitude and direction

• A stand-alone unit from which other units are derived

• A unit that measures energy

• A unit derived from other units

Which of the following describes a scalar quantity?

• A quantity with both magnitude and direction

• A quantity that has magnitude only

• A quantity that measures energy

• A quantity that measures force

What does Newton's 2nd Law state?

• For every action, there is an equal and opposite reaction

• The rate of change of momentum is proportional to the resultant force

• A body remains at rest unless acted upon by a force

• The total momentum of an isolated system is constant

What is the formula for calculating work done?

• Force x time

• Power x time

• Force x displacement moved in the direction of the force

• Mass x acceleration

What is the definition of efficiency?

• Useful output power divided by input power

• Input power divided by output power

• Output power divided by total energy

• Input energy divided by output energy

What is the relationship described by Hooke's Law?

• Energy is proportional to work done

• Force is proportional to mass

• Extension is directly proportional to the force

• Stress is proportional to strain

What is the unit of electric field strength?

• Joule

• Newton per coulomb

• Ohm

• Volt

If a wave has a frequency of 5 Hz, how many oscillations occur in 2 seconds?

• 5 oscillations

• 20 oscillations

• 15 oscillations

• 10 oscillations

What does the principle of superposition state?

• The total momentum of a system is conserved

• For every action, there is an equal and opposite reaction

• The resultant displacement is the sum of individual displacements

• The total energy in a system is constant

What is the definition of pressure?

• Work done per unit time

• Energy per unit charge

• Mass divided by volume

• Force divided by area