Question
Give one example each of any three effects of force.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sound on a hotter day?
What happens to the work done when the displacement of a body is at right angles to the direction of force acting on it? Explain your answer.
Name two animals which produce ultrasound.