Kinematics Question 166

Question: An insect moving along a straight line, travels in every second distance equal to the magnitude of time elapsed. Assuming acceleration to be constant, and the insect starts at t=0 . Find the magnitude of initial velocity of insect

Options:

A) 32unit

B) 54unit

C) 2unit

D) 12unit

Show Answer

Answer:

Correct Answer: D

Solution:

[d] distance travelled form time t-1 sec to t sec is S=u+a2(2t1)

From given condition S=t (i) and (ii)

t=u+a2(2t1)

u=a2+t(1a)

Since u and a are arbitrary constants, and they must be constant for every time.

coefficient of t must be equal to zero.

1a=0a=1 for a=1 , u=12 unit Initial speed is 12 unit.



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक