3 Evaluate the importance of lifting the track at one end. Predict the relationship between mass and acceleration. Write down Newton's second law of motion. Write down two measures that need to be taken to improve/ensure the accuracy of the experiment

1. **Importance of Lifting the Track at One End** Lifting one end of the track creates an incline so that gravity provides a component of force along the track. This has two major effects: - It generates a net force along the direction of the track that causes the cart to accelerate. - It minimizes frictional effects compared to a horizontal track by ensuring that the motion is predominantly driven by gravity. 2. **Relationship Between Mass and Acceleration** According to Newton's second law, when the net force is constant, the acceleration of an object is inversely proportional to its mass. This means that if the mass is increased while the net force remains the same, the acceleration will decrease. Formally, if the net force is \( F \), then the acceleration \( a \) is given by \[ a = \frac{F}{m}. \] 3. **Newton's Second Law of Motion** Newton's second law of motion is written as \[ F = ma, \] where \( F \) is the net force acting on an object, \( m \) is its mass, and \( a \) is its acceleration. 4. **Measures to Improve/Ensure the Accuracy of the Experiment** - **Minimize Friction and Air Resistance:** Use smooth and well-aligned tracks, and ensure that contact surfaces are clean. This reduces unwanted resistive forces that could affect the motion. - **Accurate Timing and Distance Measurements:** Use calibrated sensors or timers, and take multiple measurements to account for random errors. Data averaging can improve the reliability of the calculated acceleration.