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This is a demo preview of one section from the Dynamics module.

The full Physiworld platform contains over 100 interactive pages of physics simulations, guided explanations, quizzes, progress tracking, and XP-based learning — entirely free to use.

Explore this demo section and experience how Physiworld makes physics fun, visual, and interactive.

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Introduction to Dynamics

Dynamics explores the relationships between forces and motion, offering key insights into how objects behave under various conditions.

From understanding the forces that govern the motion of everyday objects to the complex interactions of large systems dynamics provides a universal set of principles!

Bouncing Gravity Ball

Adjust gravity and bounciness to see how the ball behaves when it hits the ground!

1
0.8

Newton's Laws of Motion important principle can be written as:

\[F_{\text{action}} = -F_{\text{reaction}}\]

\( F_{\text{action}} \) is the force applied by one object.
\( F_{\text{reaction}} \) is the equal and opposite force from the second object.

Problem: An astronaut gently pushes a small satellite with a force of \(40\,\text{N}\) in the +x direction while floating in space (negligible external forces).

Solution:
By Newton’s third law, the satellite exerts an equal and opposite force on the astronaut:
\[ F_{\text{action}} = +40\,\text{N}\ \Rightarrow\ F_{\text{reaction}} = -40\,\text{N} \] The forces are equal in magnitude and opposite in direction.

Answer: \( \mathbf{40\ \text{N}} \) on the astronaut, opposite the push.

Law of Motion Challenge

Newton’s Third Law: For every action force, there is an equal and opposite reaction force.

A swimmer pushes backward on the water with a force of 150 N.

According to Newton’s third law, what is the magnitude of the force exerted by the water on the swimmer?

N

Force and Motion Simulator

Adjust the applied force and the object's mass, then apply the force to see how acceleration changes!

50 N
10 kg

Forces are calculated by applying the force:

\[ F = m \cdot a \]

\( F \) is the force.
\( m \) is the mass.
\( a \) is the acceleration of the object.

Problem: A car of mass \(1000\,\text{kg}\) accelerates at \(3\,\text{m/s}^2\).

Solution:
Using \(F = m \cdot a\):
\(F = 1000 \times 3 = 3000\,\text{N}\).

Answer: The net force on the car is \( \mathbf{3000\ \text{N}} \).

Force and Motion Challenge

A box of mass 200 kg is pushed so that it accelerates at \(4\,\text{m/s}^2\).

What is the net force acting on the box?

N

Projectile Motion Simulator

Adjust the launch angle and initial speed, then launch the projectile to see how gravity affects its path!

45°
50 m/s

To understand an object's motion, we calculate the net force:

\[F_{\text{net}} = F_{\text{applied}} - F_{\text{friction}}\]

\( F_{\text{net}} \) is the net force on the object.
\( F_{\text{applied}} \) is the forward (driving) force.
\( F_{\text{friction}} \) is the resistive frictional force.

Problem: A sled is pulled with \(900\,\text{N}\) forward. Friction is \(200\,\text{N}\) and air resistance \(150\,\text{N}\) (both opposite motion). What is \(F_{\text{net}}\)?

Solution:
Opposing total \(= 200 + 150 = 350\,\text{N}\).
\( F_{\text{net}} = 900 - 350 = 550\,\text{N} \) (forward).

Answer: \( \mathbf{550\ \text{N}} \)

Net Force Challenge

A boat engine produces a thrust of \(700\,\text{N}\) while water resistance is \(200\,\text{N}\).

What is the net force acting on the boat?

N

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