Engineering Mechanics - Kinematics of Particle (KOP) - Discussion

Discussion :: Kinematics of Particle (KOP) - General Questions (Q.No.8)

8. 

From experimental data, the motion of a jet plane while traveling along a runway is defined by the v-t graph shown. Find the position s and the acceleration a when t = 40 s.

[A]. s = 2.80 km, a = 2.00 m/s2
[B]. s = 2.80 km, a = 0
[C]. s = 2.80 km, a = 2.67 m/s2
[D]. s = 2.80 km, a = 8.37 m/s2

Answer: Option B

Explanation:

No answer description available for this question.

Hummer said: (Jun 9, 2012)  
a= 0
because const speed

Parhta said: (Aug 24, 2013)  
What you do is you have to control your hand first without typing?

Rajkiran Hatheshwar said: (Dec 6, 2015)  
FIRSTLY AS V=CONST THEN a = 0;

NOW FOR's WE KNOW THAT AREA UNDER v&T gives distance change.

So that (10*80)/2 + 30*80 = 2.8km.

Niranjan said: (Feb 14, 2017)  
Firstly as V=CONST then a = 0;

Now for 's' we know that area under v & T gives distance change.

So, that (10 * 80)/2 + 30 * 80 = 2.8 km.

Myra said: (Mar 16, 2018)  
But the velocity has increased to an extent and so acceleration should have increased before becoming constant. Shouldn't that still be the acceleration at 40s.

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