Warm-Up 2B

Front

What is a Free Body Diagram (FBD)?

Back

A Free Body Diagram (FBD) is a graphical representation used to visualize the forces acting on an object. It shows all the external forces acting on the body, allowing for the analysis of the object's motion.

Front

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

Back

The net force acting on an object is calculated by vectorially adding all the individual forces acting on it. If forces are in the same direction, they are summed; if they are in opposite directions, they are subtracted.

Front

What is the formula for calculating the normal force on an object resting on an incline?

Back

The normal force (N) on an object resting on an incline can be calculated using the formula: N = mg cos(θ), where m is the mass of the object, g is the acceleration due to gravity, and θ is the angle of the incline.

Front

What is the relationship between tension and the components of a force when pulling an object at an angle?

Back

When pulling an object at an angle, the tension can be resolved into two components: the horizontal component (T cos(θ)) and the vertical component (T sin(θ)). The horizontal component is responsible for moving the object, while the vertical component affects the normal force.

Front

What is kinetic friction and how is it calculated?

Back

Kinetic friction is the force that opposes the motion of two surfaces sliding past each other. It is calculated using the formula: f_k = μ_k N, where f_k is the kinetic friction force, μ_k is the coefficient of kinetic friction, and N is the normal force.

Front

What is the significance of the angle of an incline in determining forces acting on an object?

Back

The angle of an incline affects the distribution of gravitational force into components that influence the normal force and friction. It determines how much of the gravitational force acts parallel and perpendicular to the surface.

Front

How does mass affect the acceleration of an object when a force is applied?

Back

According to Newton's second law, the acceleration (a) of an object is directly proportional to the net force (F) acting on it and inversely proportional to its mass (m): F = ma. Thus, greater mass results in less acceleration for the same applied force.

Front

What is the principle of equilibrium in physics?

Back

The principle of equilibrium states that an object is in equilibrium when the net force acting on it is zero. This means that all forces acting on the object are balanced, resulting in no acceleration.

Front

What is the role of friction in motion?

Back

Friction is a force that opposes the relative motion of two surfaces in contact. It plays a crucial role in enabling objects to start moving, stop, and maintain motion by providing the necessary resistance.

Front

How do you determine the direction of frictional force?

Back

The direction of the frictional force is always opposite to the direction of the applied force or the direction of motion of the object. It acts to resist the relative motion between surfaces.