Easy -1.2 This is a straightforward application of the impulse-momentum theorem with a single object and one-dimensional motion. Students need only recall the definition of impulse (change in momentum), apply sign conventions for direction, and perform basic arithmetic with given values. It's a standard textbook exercise requiring no problem-solving insight or multi-step reasoning.
A ball of mass 0.3 kg is moving vertically downwards with speed 8 m s\(^{-1}\) when it hits the floor which is smooth and horizontal. It rebounds vertically from the floor with speed 6 m s\(^{-1}\). Find the magnitude of the impulse exerted by the floor on the ball. [3]
A ball of mass 0.3 kg is moving vertically downwards with speed 8 m s$^{-1}$ when it hits the floor which is smooth and horizontal. It rebounds vertically from the floor with speed 6 m s$^{-1}$. Find the magnitude of the impulse exerted by the floor on the ball. [3]
\hfill \mbox{\textit{Edexcel M1 2002 Q1 [3]}}