U8 - Complete Problems 2 & 3

Front

What is the formula for calculating the normal force acting on an object on a flat surface?

Back

The normal force (N) can be calculated using the formula: N = mg, where m is the mass of the object and g is the acceleration due to gravity (approximately 9.81 m/s²).

Front

How do you calculate the net force acting on an object?

Back

The net force (F_net) can be calculated using the formula: F_net = F_thrust - F_drag - F_friction, where F_thrust is the applied force, F_drag is the drag force, and F_friction is the frictional force.

Front

What is the coefficient of kinetic friction and how is it used in calculations?

Back

The coefficient of kinetic friction (μ_k) is a dimensionless value that represents the friction between two moving surfaces. It is used in the formula: F_friction = μ_k * N, where N is the normal force.

Front

What is the relationship between mass, acceleration, and net force according to Newton's second law?

Back

According to Newton's second law, the relationship is given by the formula: F_net = m * a, where F_net is the net force, m is the mass of the object, and a is the acceleration.

Front

How do you determine the direction of motion of an object based on net force?

Back

The direction of motion of an object is in the direction of the net force. If the net force is positive, the object accelerates in that direction; if negative, it accelerates in the opposite direction.

Front

What is drag force and what factors influence it?

Back

Drag force is the resistance force experienced by an object moving through a fluid (like air). It is influenced by the object's speed, cross-sectional area, and the fluid's density.

Front

How do you calculate the acceleration of an object given its mass and net force?

Back

Acceleration (a) can be calculated using the formula: a = F_net / m, where F_net is the net force acting on the object and m is its mass.

Front

What is the significance of the weight of an object in motion?

Back

The weight of an object (W) is the force due to gravity acting on it, calculated as W = mg. It is significant because it affects the normal force and the frictional force acting on the object.

Front

What is thrust in the context of flight?

Back

Thrust is the force that propels an aircraft forward, generated by engines or propellers. It must overcome drag and weight for the aircraft to accelerate.

Front

How do you calculate the horizontal component of thrust?

Back

The horizontal component of thrust can be calculated by resolving the thrust vector into its horizontal and vertical components, typically using trigonometric functions based on the angle of the thrust.