Free Body Diagrams and Newton's laws

Front

What is a Free Body Diagram (FBD)?

Back

A Free Body Diagram is a graphical representation used to visualize the forces acting on an object. It shows all the external forces acting on the body, represented as arrows pointing in the direction of the force.

Front

What are Newton's three laws of motion?

Back

1. First Law: An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force. 2. Second Law: The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma). 3. Third Law: For every action, there is an equal and opposite reaction.

Front

What is the role of frictional force in motion?

Back

Frictional force opposes the relative motion between two surfaces in contact. It can slow down or stop the motion of an object.

Front

How does air resistance affect a skydiver?

Back

Air resistance acts upward against the force of gravity when a skydiver falls. When the parachute opens, air resistance increases significantly, slowing the skydiver down.

Front

What is net force?

Back

Net force is the vector sum of all the forces acting on an object. It determines the object's acceleration and direction of motion.

Front

How do you calculate net force?

Back

Net force can be calculated by adding all the forces acting on an object, taking into account their directions. If forces are in opposite directions, subtract the smaller force from the larger one.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object with respect to time. It can be caused by a change in speed or direction.

Front

What is the formula for calculating acceleration?

Back

Acceleration (a) can be calculated using the formula: a = (final velocity - initial velocity) / time.

Front

What happens to an object when the net force is zero?

Back

When the net force acting on an object is zero, the object remains in its current state of motion, either at rest or moving at a constant velocity.

Front

What is the significance of the direction of forces in Free Body Diagrams?

Back

The direction of forces in Free Body Diagrams is crucial as it indicates how the forces interact and affect the motion of the object. Forces in the same direction add up, while forces in opposite directions subtract.