Question 1: Define the term 'Resultant Force'.

Answer: The single force that represents the combined effect of all forces acting on an object.

Question 2: Explain how two forces acting in opposite directions on an object affect the Resultant Force.

Answer: The Resultant Force is the difference between the two forces; if the forces are equal, they cancel each other out, resulting in no movement.

Question 1: A car experiences a forward force of 500 N and a backward resistive force of 200 N. Calculate the Resultant Force acting on the car. (Use F=ma if needed, but assume mass is constant for simplicity.)

Answer: Resultant Force = 300 N (forward)

Question 2: Two workers are pushing a box with forces of 150 N and 100 N in the same direction. What is the Resultant Force? State whether the motion will be in the same direction as the pushes.

Answer: Resultant Force = 250 N (in the same direction); the box will accelerate in that direction.

Question 1: Outline a basic method for investigating how the Resultant Force changes when two forces of different magnitudes are applied in the same direction.

Answer: Set up two forces using spring balances attached to a common object. Gradually increase one force while keeping the other constant. Measure the combined force when both are in the same direction. Ensure the object is on a smooth, frictionless surface and handle equipment carefully to avoid injury. Record the forces and note the point at which the object begins to move or accelerate.

Question 1: A boat is being pulled by two ropes. Rope A exerts a force of 400 N northward, while Rope B exerts 300 N northeastward. Describe qualitatively how you would determine the Resultant Force acting on the boat without drawing a graph.

Answer: Break down the forces into components and use vector addition to find their combined effect. Consider the direction of each force and sum the components accordingly to determine the magnitude and direction of the Resultant Force.

Question 1: Explain how understanding Resultant Forces is important in designing safe car brakes.

Answer: Engineers must calculate the Resultant Force when brakes apply force in opposition to vehicle motion to ensure the brakes can generate enough force to stop the car safely without skidding.

Question 2: Describe a real-world scenario where multiple forces act on an object and how understanding Resultant Forces can prevent accidents or improve efficiency.

Answer: In construction cranes lifting heavy loads, multiple forces—including the weight of the load, wind forces, and the tension in the cables—act simultaneously. Calculating the Resultant Force helps ensure the crane's structure can handle the load safely, preventing collapse or accidents.