May 2020 ILS past paper

Which is a contact force?

• air resistance

• gravity

• magnetism

• static electricity

Which is a composite material?

• magnesium oxide

• porcelain

• MDF (medium density fibreboard)

• poly(chloroethene) PVC

Which particles move through a wire when an electric current flows?

• atoms

• electrons

• protons

• neutrons

• 
• 
• 
• 

The average speed during the first 25 secondsis 1.2 m/s ​ (a)  

The average speed during the first 25 seconds is 2.4 m/s ​ (b)  

The average speed during the 50 second journey is 2.4 m/s ​ (c)  

• False
• True

Magnesium metal burns very brightly to produce heat and a white solid. What type of chemical reaction is taking place?

• endothermic

• exothermic

• reduction

• thermal decomposition

The graphs show the effect of force on a metal spring. Which graph shows the spring obeying Hooke’s Law?

• 
• 
• 
• 

• 0.6

• 6

• 24

• 240

Label the correct force for the picture!

a

b

drag

upthrust

friction

air resistance

weight

Explain, in terms of forces, why the duck is floating on the water.