Scalars Vectors And Projectile Motion

Which of the following is a complete list of vector quantities only?

A force of 120 N acts at an angle of 40° above the horizontal. What is the horizontal component of this force?

Two perpendicular forces act on an object: 9.0 N north and 12.0 N east. What is the magnitude of the resultant force?

A projectile is launched at an angle above the horizontal and follows a parabolic trajectory. Which statement about the projectile at the highest point of its path is correct?

A vector of magnitude 50 N points at an angle of 30° measured from the vertical axis. What is the horizontal component of this vector?

A stone is thrown horizontally from the top of a cliff at 15 m s⁻¹. Air resistance is negligible. Which statement correctly describes the motion of the stone before it lands?

A ball is launched from level ground at 20 m s⁻¹ at an angle of 45° above the horizontal. Taking g = 9.81 m s⁻², what is the maximum height reached?

Two vectors A and B are described as equal. Which condition must be satisfied?

A swimmer can swim at 1.2 m s⁻¹ in still water. They swim directly across a river that flows at 1.6 m s⁻¹ perpendicular to the swimmer’s heading. What is the magnitude of the swimmer’s resultant velocity relative to the bank?

Why can the horizontal and vertical motions of a projectile be analysed independently?

A force of 200 N acts horizontally and a second force of 200 N acts vertically downwards on the same point. What is the direction of the resultant relative to the horizontal?

A football is kicked at 18 m s⁻¹ at 60° above the horizontal from level ground. Taking g = 9.81 m s⁻², what is the total time of flight?

A cyclist travels 300 m north and then 400 m east. A second cyclist runs 700 m east. Which statement comparing the two journeys is correct?

A student calculates that the resultant of two perpendicular forces is 50 N and writes “50 N” as the final answer. Why would this answer lose marks in an Edexcel examination?