Forces and Friction - JSS2 Basic technology Past Questions and Answers - page 1
What type of force pulls objects towards the centre of the Earth?
Frictional force
Gravitational force
Magnetic force
Electrostatic force
Which force opposes the motion of objects sliding past each other?
Gravitational force
Magnetic force
Frictional force
Normal force
What type of force is exerted by magnets?
Gravitational force
Frictional force
Magnetic force
Tensional force
Which force occurs between charged particles?
Gravitational force
Magnetic force
Frictional force
Electrostatic force
What is the main function of lubricants?
To increase friction
To reduce friction
To create more heat
To polish surfaces
Which type of friction occurs when a book rests on a table without moving?
Static friction
Kinetic friction
Rolling friction
Fluid friction
What technique is used to reduce friction in machinery?
Increasing surface roughness
Removing lubricants
Using ball bearings
Applying more weights
Which force supports the weight of an object resting on a surface?
Gravitational force
Normal force
Magnetic force
Frictional force
What is the effect of friction on moving parts in a machine?
Reduces efficiency
Increases speed
Prevents wear and tear
Cools the parts
Which of the following is a method to reduce friction between surfaces?
Increasing roughness
Removing lubricants
Polishing the surfaces
Applying more force