SEHS B.2.2 Fluid Mechanics

What is a projectile?

• An object that is pushed

• An object that is thrown or dropped

• An object that is floating

• An object that is stationary

What primarily affects the path of a projectile?

• Color of the object

• Surface area of the object

• Weight of the object

• Initial velocity

What angle of projection maximizes range when the landing height is the same as the projection height?

• 30 degrees

• 90 degrees

• 60 degrees

• 45 degrees

What happens to the trajectory when the projection height increases?

• It decreases

• It becomes flatter

• It becomes higher

• It remains the same

What is the effect of air resistance on faster moving projectiles?

• It makes them float

• It has no effect

• It decreases their speed

• It increases their speed

What is buoyancy?

• A force acting vertically on objects in a fluid

• A force acting horizontally on objects in a fluid

• A force that increases weight

• A force that decreases speed

What does drag force depend on?

• The color of the object

• The shape of the object

• The temperature of the fluid

• The weight of the object

What is the Magnus effect?

• The resistance of air on a stationary object

• The buoyancy of an object in water

• The lift force on a rotating object

• The effect of gravity on a projectile

What is the relationship between fluid velocity and pressure according to Bernoulli's principle?

• Lower velocity equals lower pressure

• Higher velocity equals lower pressure

• Pressure has no relation to velocity

• Higher velocity equals higher pressure

What type of drag is caused by the interaction between the surface of the body and fluid molecules?

• Buoyant drag

• Surface drag

• Form drag

• Wave drag