UAE MoE Grade 12 Friction, Drag and Elasticity — practice questions
26 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice UAE MoE Grade 12 Friction, Drag and Elasticity in the app →What does friction do to the relative motion of two surfaces in contact?In which direction does the force of friction act?What name is given to friction between two surfaces that are sliding over each other?For the same pair of surfaces, how do static and kinetic friction compare?Why is a heavy crate harder to start moving than to keep moving?How does static friction respond as you push harder on a crate that will not move?In the expression for the largest static friction, what does the normal force represent?Which symbol in the kinetic friction relation stands for the coefficient of kinetic friction?Friction is proportional to the normal force, but not to which quantity?When two rough surfaces touch, how much of the total area is really in contact?What happens to the true area of contact when the normal force is increased?How does the drag force on a moving object depend on its speed?A skydiver reaches terminal velocity. What is true of the forces on them?Why does the speed stop changing once the net force on a falling body is zero?Two skydivers of different mass fall in the same posture. Which reaches the greater terminal velocity?In Hooke's law, what does the change in length of the object represent?A block sits still on a bench while nobody pushes it. What is the friction on it?Oiling a concrete floor makes a crate easier to move. What has changed?Adding a heavy box on top of a crate makes it harder to push. Why?Why do two surfaces become warm when they are rubbed together?Which of these is the standard everyday example of kinetic friction acting?What kind of characteristics of friction are the simple rules taught at school?What would a nearly friction-free environment save on a large scale?Which two forces act on a skydiver falling through air, once buoyancy is ignored?What happens to the downward force of gravity on a skydiver as their speed rises?The tip of a probe dragged across a material is deformed by atomic-scale friction. The force needed relates to