सामान्य परवलयाकार प्रक्षेप्य पथ (parabolic trajectory) पर गतिमान एक प्रक्षेप्य आंतरिक बलों के कारण हवा के बीच में ही टुकड़ों में विस्फोटित हो जाता है। निकाय का द्रव्यमान केंद्र (centre of mass):

A force of -Fî acts at the origin of the coordinate system. What is the torque about the point (0, 1, -1)?

A uniform circular plate of uniform density is placed in the x-y plane with its centre at the origin of the Cartesian coordinate system. A small piece of irregular shape is removed from the centre of the plate and glued to the outer edge (periphery) of the plate in the first quadrant. Which one of the following statements is true?