S2 Physics - Forces, circuits and waves

What is the formula to calculate weight?

• W = m + g

• W = m x g

• W = m / g

• W = g - m

What does 'density' mean?

• The volume of an object

• The weight of an object per unit of volume

• The mass of a substance per unit of volume

• The gravitational force exerted by a substance

Which principle explains why objects float in water?

• Newton's First Law of Motion

• Archimedes' Principle

• Pascal's Law

• Bernoulli's Principle

What is gravitational field strength?

• The speed needed to escape a planet's gravity

• The force exerted by the earth on an object

• The weight of an object in newtons

• The force of gravity per unit mass

What is the escape velocity?

• The speed at which an object needs to travel to remain in orbit

• The particular speed that objects need to travel at to escape from a planet’s gravity

• The speed at which an object falls to a planet

• The maximum speed an object can achieve in space

What happens to the magnetic fields when like poles of two magnets are placed near each other?

• A) They attract each other

• B) They repel each other

• C) They cancel each other out

• D) They create a neutral point

Which of the following materials is considered a strong magnet?

• A) Brass

• B) Iron

• C) Zinc

• D) Tin

What is the effect of heating up a magnet?

• A) It becomes a stronger magnet

• B) It becomes demagnetised

• C) It attracts non-magnetic materials

• D) It changes polarity

What is measured in Amperes?

• A) Voltage

• B) Resistance

• C) Current

• D) Magnetism

What is voltage?

• The resistance of a circuit

• The energy or "push" that individual charges have

• The speed of electron flow

• The number of electrons in a circuit