Question 1: Define 'resultant force' in the context of forces acting on an object.

Answer: The single force that has the same effect as all the individual forces acting on an object combined.

Question 2: Explain how two forces acting in opposite directions on an object influence its motion.

Answer: They either cancel each other out if equal or produce a net force in the direction of the larger force, affecting the object's acceleration.

Question 1: A car is pulled with a force of 600 N east and a second force of 400 N east. Calculate the resultant force acting on the car.

Answer: Resultant force = 600 N + 400 N = 1000 N east

Question 2: A boat experiences a force of 300 N south and a force of 150 N north. Find the magnitude and direction of the resultant force.

Answer: Resultant force = 300 N south - 150 N north = 150 N south

Question 1: Describe a safety precaution that should be taken during an experiment to measure forces acting on an object.

Answer: Ensure the object is securely fixed or held to prevent unintended movement and use appropriate safety equipment.

Question 2: Identify the variables that need to be controlled in an experiment to determine the resultant force on a sliding block.

Answer: Mass of the block, magnitude and direction of applied forces, frictional forces, and surface conditions.

Question 1: A cyclist is riding with a force of 250 N forward while a wind applies a force of 50 N backward. What is the net force acting on the cyclist, and in which direction?

Answer: Net force = 250 N - 50 N = 200 N forward

Question 2: A drone experiences three forces: 10 N upward, 10 N downward, and 5 N north. What is the resultant force and its direction?

Answer: Vertical forces cancel out; resultant force = 5 N north

Question 1: Explain how understanding resultant forces is important in designing safety features in automotive engineering.

Answer: Understanding resultant forces allows engineers to design vehicle structures that withstand impacts, optimise braking systems to produce controlled deceleration, and improve stability by balancing forces during motion, thereby enhancing safety for passengers.

Question 2: Discuss how the concept of resultant forces applies to the operation of cranes lifting heavy loads in construction.

Answer: In crane operation, the resultant force determines the net effect of gravitational pull, tension in the lifting cable, and any lateral forces. Proper analysis ensures the crane's stability, prevents tipping, and allows safe lifting by balancing these forces to avoid excess stress on the structure.