Answer: The force of gravity acting on it.
- A Its mass in most textbook accounts
- B The force of gravity acting on it
- C Its density x volume during normal conditions
- D The normal force on it as generally observed
Correct answer: B. The force of gravity acting on it
Explanation: Weight = mg, the gravitational force pulling the body toward Earth.
Free-body diagram of a block on an incline: weight (mg) resolves into mg sinθ along the slope and mg cosθ into the slope, balanced by the normal force N and friction f.
Concept context
Newton's three laws, friction, circular motion, and free body diagrams.