Question 1: Define what a velocity-time graph represents in the context of an object in motion.

Answer: A velocity-time graph shows how the velocity of an object changes over time.

Question 2: Explain what the gradient of a velocity-time graph indicates about the object's motion.

Answer: The gradient indicates the acceleration of the object; a positive gradient means acceleration, a negative gradient means deceleration.

Question 3: Describe what a horizontal straight line on a velocity-time graph signifies about the object's motion.

Answer: It signifies that the object is moving at a constant velocity.

Question 1: An object accelerates from 0 m/s to 20 m/s over 4 seconds. Calculate its average acceleration in m/s².

Answer: 5 m/s²

Question 2: If an object maintains a velocity of 15 m/s for 10 seconds, what is the total displacement during this period?

Answer: 150 metres

Question 1: Describe a simple method to measure the velocity of a rolling object at different times in a laboratory setting.

Answer: Use a motion sensor or timing gates to record the time for the object to pass fixed points and calculate velocity from distance and time.

Question 2: Identify two variables that should be controlled during an experiment measuring the velocity of a moving object.

Answer: Initial velocity and slope of the surface (incline), to ensure consistent conditions.

Question 3: State one safety precaution to observe when conducting motion experiments in the lab.

Answer: Ensure the path is clear of obstacles and the apparatus is securely fixed to prevent accidents.

Question 1: A vehicle's velocity increases from 0 m/s to 30 m/s over 6 seconds, then remains constant for 4 seconds, and finally decreases back to 0 m/s over 3 seconds. Describe the overall motion profile of the vehicle.

Answer: The vehicle accelerates from rest, maintains a constant speed, then decelerates to stop, indicating a typical acceleration, constant velocity, and deceleration pattern.

Question 2: If a velocity-time graph shows a decreasing gradient, what does this imply about the object's acceleration?

Answer: It implies that the object is decelerating (negative acceleration).

Question 1: Explain how understanding velocity-time graphs is important in the design of vehicle safety systems such as airbags and crumple zones.

Answer: Velocity-time graphs help analyse how quickly a vehicle changes speed during a collision, enabling engineers to design systems that absorb impact energy and protect occupants effectively.

Question 2: Describe how velocity-time data is used in the development of autonomous vehicles.

Answer: Velocity-time data allows autonomous vehicle systems to monitor and adjust speed in real-time, ensuring smooth acceleration and deceleration, collision avoidance, and optimal traffic flow based on motion analysis.