Newton's Laws of Motion - Theory & Concepts - Newtons Second Law

A comprehensive overview of Newton's Laws of Motion, explaining force, mass, acceleration, and equilibrium.

Interactive engineering simulation

Newton's Second Law & Free-Body Diagram Simulator

Apply a constant horizontal pulling force to a rolling cart. Observe how mass and kinetic friction create counteracting forces in a complete Free-Body Diagram (FBD).

Block Mass (M)8 kg

1–20

Drag for exploration or enter an exact value. Press Enter to apply; Escape restores the current value.

Applied Pulling Force (Fa)35 N

0–100

Drag for exploration or enter an exact value. Press Enter to apply; Escape restores the current value.

Friction Coefficient (μk)0.25

0.00–0.80

Drag for exploration or enter an exact value. Press Enter to apply; Escape restores the current value.

Newtonian Dynamics Rules

Net Pull Force:

F_{net} = F_a - f_k

Acceleration:

a = F_{net} / M

Friction Resistance:

f_k = \mu_k \cdot M \cdot g

If the applied pulling force ($F_a$) is lower than the static friction limit ($f_k$), the cart remains completely at rest.

Friction Resistance (fk)

19.62 N

Net Pulling Force (Fnet)

15.38 N

Acceleration (a)

1.92 m/s²

Model scope and verification

Use the displayed units and idealizations, then verify the governing balance or compatibility equation before interpreting the result.

Measurement and Vectors - Theory & Concepts - Significant Figures Kinematics - Theory & Concepts - Kinematics Graph Work, Energy, and Power - Theory & Concepts - Conservation Energy Work, Energy, and Power - Theory & Concepts - Power Work Rate

Related simulations