A large metal crate is carried on the flatbed of a truck moving forward along a straight horizontal road at a constant speed. Only two horizontal forces act on the crate: air resistance and the friction between the crate and the flatbed of the truck.
Which of the following correctly describes the directions and the magnitudes of these two forces?
They act in the same direction and have different magnitudes.
They act in the same direction and have the same magnitude.
They act in opposite directions and have different magnitudes.
They act in opposite directions and have the same magnitude.
183 exam-style questions on CIE IGCSE Physics 1.5.1a Forces, resultant force and motion. Each one has a worked solution and a mark scheme showing where the marks go.