diff --git a/src/Acceleration.java b/src/Acceleration.java
new file mode 100644
index 0000000..8a8aef6
--- /dev/null
+++ b/src/Acceleration.java
@@ -0,0 +1,37 @@
+import java.util.*;
+
+public class Acceleration {
+	private Map.Entry<Double, Double> force;
+	private double mass;
+	private Velocity velocity;
+	private Onground onground;
+	private Map.Entry<Double, Double> acceleration;
+	public void updateForce(Map.Entry<Double, Double> force) {
+		this.force = force;
+		Map.Entry<Double, Double> temp_l3;
+		if(this.onground.getOnground()) {
+			temp_l3 = new AbstractMap.SimpleEntry<>((force.getKey()/mass), 0.0);
+		} else {
+			temp_l3 = new AbstractMap.SimpleEntry<>((force.getKey()/mass), (force.getValue()/mass));
+		}
+		acceleration = temp_l3;
+		velocity.updateAcceleration(acceleration);
+	}
+	public void updateMass(double mass) {
+		this.mass = mass;
+		Map.Entry<Double, Double> temp_l6;
+		if(this.onground.getOnground()) {
+			temp_l6 = new AbstractMap.SimpleEntry<>((force.getKey()/mass), 0.0);
+		} else {
+			temp_l6 = new AbstractMap.SimpleEntry<>((force.getKey()/mass), (force.getValue()/mass));
+		}
+		acceleration = temp_l6;
+		velocity.updateAcceleration(acceleration);
+	}
+	public Acceleration(Velocity velocity, Onground onground) {
+		this.onground = onground;
+	}
+	public Map.Entry<Double, Double> getAcceleration() {
+		return acceleration;
+	}
+}
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