A particle moving in a straight line covers half of Total distance with a speed of 3 metre per second the other half of the distance is covered into two equal time interval with a speed of 4.5 metre per second and 7.5 metre per second . the average speed of the particle during the motion
Answers
Answer:6 m/s
Explanation:
Average velocity=V1 +V2 ÷2
=7.5+4.5/2=12/2
=6 m/s
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Jiya22
Secondary SchoolPhysics 13+7 pts
A particles moving in a straight line covers half of the total distance with a speed of 3 m/s. The other half of the distance is covered in two equal time intervals with speeds of 4.5 m/s and 7.5 m/s. The average speed of the particle during this motion is (a) 4 m/s (b) 5 m/s (c) 5.5 m/s (d) 4.8 m/s
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rahulsirtm
Rahulsirtm Ambitious
5.5 is the average speed
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Jiya22
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Jiya22
Jiya22 Ambitious
Answer: a)4m/s is the correct answer
Explanation:
Let the distance covered be 2d.
Time taken to cover d
(T) = d/3 ....(since, t=d/s)
Now other half is covered in equal intervals of time.. let them be t.
d = 4.5t+7.5t
d=12t
t=d/12
Average Speed = Total distance/Total time
= 2d/( d/3+d/12+d/12)
= 2d/3d/6
= 4m/s