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Can you answer both graph questions from w.e and kinematics only give correct option?

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Asked by vikrammalikviku 2nd January 2018, 12:56 PM
Answered by Expert
Answer:

Force Time Graph Solution

Question : 28 From the image

From 0 to 3 seconds

Power = fv = 1 x 2 = 2 watt

From 3 to 5 seconds

 

a= (v-u)/t = (0-2)/2

= -1 m/s2

|F|=ma= 2x-1 =2 N

S= ut+ (1/2) at

= 2x2 -(1/2) x1x22

= 2 m 

Power = (Fs)/t= (2 x 2) /2 = 2 watt

Total power = 2+2 = 4 watt

 

None of these

Answered by Expert 8th January 2018, 12:12 PM
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