diff --git a/src/Acceleration.java b/src/Acceleration.java
index e44caaa..37babc8 100644
--- a/src/Acceleration.java
+++ b/src/Acceleration.java
@@ -1,23 +1,21 @@
-import java.util.*;
-
 public class Acceleration {
 	private double mass;
-	private Vector2 force;
+	private Pair<Double> force;
 	private Velocity velocity;
 	private Onground onground;
-	private Vector2 acceleration;
+	private Pair<Double> acceleration;
 
 	public void updateMass(double mass) {
 		this.mass = mass;
-		acceleration = (this.onground.getOnground() ? new AbstractMap.SimpleEntry<>((force.getKey() / mass), 0.0)
-				: new Vector2((force.getX() / mass), (force.getY() / mass)));
+		acceleration = (this.onground.getOnground() ? new Pair<>((force.getX() / mass), 0.0)
+				: new Pair<>((force.getX() / mass), (force.getY() / mass)));
 		velocity.updateAcceleration(acceleration);
 	}
 
-	public void updateForce(Vector2 force) {
+	public void updateForce(Pair<Double> force) {
 		this.force = force;
-		acceleration = (this.onground.getOnground() ? new Vector2((force.getX() / mass), 0.0)
-				: new Vector2((force.getX() / mass), (force.getY() / mass)));
+		acceleration = (this.onground.getOnground() ? new Pair<>((force.getX() / mass), 0.0)
+				: new Pair<>((force.getX() / mass), (force.getY() / mass)));
 		velocity.updateAcceleration(acceleration);
 	}
 
@@ -26,7 +24,7 @@
 		this.onground = onground;
 	}
 
-	public Vector2 getAcceleration() {
+	public Pair<Double> getAcceleration() {
 		return acceleration;
 	}
 }
\ No newline at end of file