End of Year 12 Quiz!

Leo and Ava are having a debate. Which of the following statements is Newton's First Law?

• An object stays at rest or constant speed if the resultant force is 0

• Resultant force is directly proportional to acceleration (F=ma)

• If an object A exerts a force on object B then object B will exert an equal and opposite force on object A

• The total current going into a junction equals the total current leaving a junction

Hey Anaya, Charlie, and Poppy! Can you figure out the conditions for a Newton’s 3rd law pair?

• Same type of force, acts on different objects, same size force and forces are in opposite directions

• Different type of force, acts on the same object, different size force and forces are in the same direction

• Same type of force, acts on the same object, same size force and forces are in the same direction

• Different type of force, acts on different objects, different size force and forces are in opposite directions

Imagine Sebastian and Isabelle are in a car race! In which scenario does Newton’s 3rd law help their car accelerate?

• Sebastian’s car tyre pushes back on the road, and the road pushes the tyre forward

• Sebastian’s car tyre pushes back on the road, and the road pulls the tyre backward

• Isabelle’s car tyre pulls back on the road, and the road pushes the tyre forward

• Isabelle’s car tyre pulls back on the road, and the road pulls the tyre backward

James, Alexander, and Rosie are discussing physics. Which of the following describes a state of equilibrium for an object?

• Resultant force is 0 and resultant moment is 0

• Resultant force is 0 and resultant moment is not 0

• Resultant force is not 0 and resultant moment is 0

• Resultant force is not 0 and resultant moment is not 0

Imagine William and George are skydiving! How does an object, like them, reach terminal velocity?

• The resultant force becomes 0, and the object carries on at a constant velocity

• The resultant force becomes 0, and the object accelerates indefinitely

• The resultant force becomes equal to the weight, and the object accelerates indefinitely

• The resultant force becomes equal to the weight, and the object decelerates

James and Neha are debating physics problems. When should they ditch SUVAT and switch to an energy argument?

• When the acceleration is not constant

• When the velocity is not constant

• When the force is not constant

• When the mass is not constant

During a lively classroom debate, Alexander, Aarav, and Arthur are discussing Kirchhoff’s laws. Can you help them figure out which of the following is Kirchhoff’s First Law?

• The total current going into a junction equals the total current leaving a junction

• The total potential difference in a closed loop equals 0

• The total resistance in a circuit equals the sum of individual resistances

• The total voltage in a circuit equals the sum of individual voltages

Arjun and Ava are discussing circuit laws. Can you help them figure out which of the following is Kirchhoff’s Second Law?

• The total potential difference in a closed loop equals 0

• The total current going into a junction equals the total current leaving a junction

• The total resistance in a circuit equals the sum of individual resistances

• The total voltage in a circuit equals the sum of individual voltages

Isabelle and Ella are discussing the I-V graph for a filament lamp. Can you help them understand it better?

• As PD increases, the temperature increases therefore the resistance increases

• As PD decreases, the temperature increases therefore the resistance increases

• As PD increases, the temperature decreases therefore the resistance increases

• As PD increases, the temperature increases therefore the resistance decreases

During a science experiment, Ishaan and Scarlett are testing a diode. Can you help them figure out the direction of current flow in a diode under forward bias?

• Positive to negative

• Negative to positive

• Both directions

• No current flow