If a body covers 2/5th of the total distance with Vi speed and 3/5th distance with V2, then average speed is
Correct answer: C. C
- A. A
- B. B
- C. C
- D. D
Explanation
C is the correct option. Avg speed= Total distance/ total time Total distance =X Total time;time for V1=2X/5V1 time for V2 = 3 X/ 5V2total time =2X/5V1 + 3 X/ 5V2 =X(2V2 + 3V1)/5V1V2Avg speed = X/X(2V2 + 3V1)/5V1V2 =5V1V2 /2V2 + 3V1 .
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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