निम्नलिखित प्रकार के बलों पर विचार कीजिए: (A) पेशीय बल (Muscular force) (B) चुंबकीय बल (Magnetic force) (C) घर्षण बल (Frictional force) (D) गुरुत्वाकर्षण बल (Gravitational force) (E) स्थिरवैद्युत बल (Electrostatic force) उपरोक्त में से किसे गैर-संपर्क बल (non-contact forces) के रूप में वर्गीकृत किया गया है?

Which of the following statements is/are NOT correct? I. Force per unit volume is defined as pressure. II. Liquids exert pressure on the walls of their container. III. A force acting on an object can change its state of motion but can never alter its shape.

The effect of thrust on a surface depends on the area on which it acts. Force acting on a smaller area exerts a ___________ compared to a larger area.