Core questions – Physics unit 5 - Forces

What is a vector quantity?

• A quantity with magnitude (size) and direction

• A quantity with only magnitude

• A quantity with only direction

• A quantity with no magnitude or direction

What examples are there of vector quantities?

• Any force, velocity, displacement, acceleration, momentum

• Temperature, mass, energy, time, distance

• Pressure, area, volume, density, frequency

• Wavelength, electric charge, entropy, luminous intensity, mole

What is a scalar quantity?

• A quantity with magnitude (size) only

• A quantity with both magnitude and direction

• A quantity with direction only

• A quantity that cannot be measured

What examples are there of scalar quantities?

• Speed, distance, mass, temperature, time

• Velocity, force, acceleration, displacement, momentum

• Current, voltage, resistance, power, energy

• Area, volume, density, pressure, impulse

How are vectors represented in a diagram?

• With an arrow

• With a dot

• With a square

• With a circle

How is the magnitude and direction of a force represented in a vector diagram?

• The length represents the size of the quantity and the arrowhead the direction

• The color of the arrow represents the magnitude and the thickness represents the direction

• The area under the arrow represents the magnitude and the base represents the direction

• The position of the arrow represents the magnitude and the label represents the direction

What is a force?

• A push or pull acting on an object

• A type of energy stored in objects

• A measurement of temperature

• A form of light energy

What is a contact force?

• A force exerted when the objects are physically touching

• A force that acts at a distance without touching

• A force that only exists in liquids

• A force that is caused by temperature changes

What examples are there of contact forces?

• Friction, air resistance, tension, normal contact force

• Gravity, magnetism, electrostatic force, nuclear force

• Light, sound, heat, electricity

• Radio waves, microwaves, X-rays, gamma rays

What is a non-contact force?

• A force exerted on objects that are physically separated

• A force that requires direct contact between objects

• A force that only acts on living things

• A force that can only occur in liquids