diff --git a/game/ai.go b/game/ai.go
index 806b80f..7a317e2 100644
--- a/game/ai.go
+++ b/game/ai.go
@@ -20,7 +20,7 @@ func chooseCommand(s State, teamID int) command {
 
 	if nextRacer != nil {
 		if h.Position.Lane != nextRacer.Position.Lane {
-			if abs(nextRacer.Position.Pos-h.Position.Pos) < h.v {
+			if abs(nextRacer.Position.Pos-h.Position.Pos) < h.Kinetics.V {
 				return slowDown
 			}
 		}
diff --git a/game/commands.go b/game/commands.go
index d13bb5a..65f728c 100644
--- a/game/commands.go
+++ b/game/commands.go
@@ -23,11 +23,11 @@ func doCommand(cmd command, s State, teamID int) State {
 
 	switch cmd {
 	case speedUp:
-		r.a += da
+		r.Kinetics.A += da
 		*r = accelerate(*r)
 		s = updateRacer(s, *r)
 	case slowDown:
-		r.a -= da
+		r.Kinetics.A -= da
 		*r = accelerate(*r)
 		s = updateRacer(s, *r)
 	case left:
@@ -40,7 +40,7 @@ func doCommand(cmd command, s State, teamID int) State {
 		pos := r.Position
 		pos.Pos++
 		s = removeObstacle(s, pos)
-		r.v = 0
+		r.Kinetics.V = 0
 		s = updateRacer(s, *r)
 	}
 
diff --git a/game/game.go b/game/game.go
index 3a0ffb9..9c9037e 100644
--- a/game/game.go
+++ b/game/game.go
@@ -33,11 +33,11 @@ func maybePassBaton(s State, teamID int) State {
 			continue
 		}
 		if abs(r.Position.Pos-h.Position.Pos) <= PassDistance {
-			h.v = 0
-			h.a = 0
+			h.Kinetics.V = 0
+			h.Kinetics.A = 0
 			s = updateRacer(s, *h)
 			newH := t.Racers[i]
-			newH.a = baseAccel
+			newH.Kinetics.A = baseAccel
 			t.Baton.HolderID = newH.ID
 			s = updateTeam(s, t)
 			return updateRacer(s, newH)
@@ -146,8 +146,12 @@ type Racer struct {
 	TeamID   int
 	Position Position
 	StartPos Position
-	v        int
-	a        int
+	Kinetics Kinetics
+}
+
+type Kinetics struct {
+	V int
+	A int
 }
 
 type Position struct {
diff --git a/game/physics.go b/game/physics.go
index 40bb474..a0d4845 100644
--- a/game/physics.go
+++ b/game/physics.go
@@ -1,26 +1,26 @@
 package game
 
 func accelerate(r Racer) Racer {
-	if r.a < -MaxA {
-		r.a = -MaxA
+	if r.Kinetics.A < -MaxA {
+		r.Kinetics.A = -MaxA
 	}
-	if r.a > MaxA {
-		r.a = MaxA
+	if r.Kinetics.A > MaxA {
+		r.Kinetics.A = MaxA
 	}
 
-	r.v += r.a
-	if r.v > MaxV {
-		r.v = MaxV
+	r.Kinetics.V += r.Kinetics.A
+	if r.Kinetics.V > MaxV {
+		r.Kinetics.V = MaxV
 	}
-	if r.v < -MaxV {
-		r.v = -MaxV
+	if r.Kinetics.V < -MaxV {
+		r.Kinetics.V = -MaxV
 	}
 
 	return r
 }
 
 func moveRacer(s State, r Racer) State {
-	for i := 0; i < r.v; i++ {
+	for i := 0; i < r.Kinetics.V; i++ {
 		if o := collide(r.Position.Pos+1, r.Position.Lane, s); o != nil {
 			return destroyRacer(s, r)
 		} else {