Forces in two dimensions (including resolution of a force)

12 questions

1. How many newtons (N) are there in 53 kN?
2. The diagram shows a force arrow drawn on a grid of 1 cm squares. What is the magnitude of the force?
3. There is a law of physics which states that an object will remain at rest, or in motion in a straight line at constant speed, unless a resultant force is acting on it. What is the name of this law?
4. What is the magnitude of the resultant force in this diagram?
5. The diagram shows an object with a single force acting on it. Which of the following are possible descriptions of the object’s motion?
6. A child throws a ball straight up. Which of the following is a correct free body diagram of the ball as it travels upwards?
7. A helicopter is in the air in a state of equilibrium. Which of the following motions are possible?
8. A duck is swimming in a straight line across the surface of a lake at a steady speed. Which of the following free body diagrams correctly shows the forces acting on the duck?
9. An aeroplane and its free body diagram are shown. Which of the following are possible descriptions of the aeroplane’s motion?
10. A spaceship in space uses two rockets to produce forces acting in two directions at the same time. Which of the following vector diagram shows how to find the resultant force?
11. The vector diagram shows the addition of three forces to find the resultant force. What is the magnitude of the resultant force?
12. The vector diagram shows a force on a grid of 1 cm squares. Which of the following is the correct description of the horizontal component of the force?

License: OGL