AIPMT / Neet 2007 , Subject : Physics , Topic : Kinematics Solutions

 Q 1 )The position x of a particle with respect to time t along x-axis is given by x=9t2−t3 where x is in metres and t is in seconds. What will be the position of this particle when it achieves maximum speed along the + x direction?

Description : ghumao ghumao kind of question , position to velocity then application of knowledge of calculus ( maxima n minima) then again back to position. in short chances of making mistake while moving between different parameters.

Q 2) A particle starting from the origin (0, 0) moves in a straight line in the (x,y) plane. Its coordinates 

       at a later time are (√3,3). The path of the particle makes with the x-axis an angle of

Description : this question could( sabke liye ho aisa nahi hai) be a problem for those who don't know about how to calculate angle of position vector with axis so nahi aata toh nahi aata , koi baat nahi just ,watch n learn

Q 3) A car moves from X to Y with a uniform speed vu and returns to Y with a uniform speed vd. The 

       average speed for this round trip is

Description : round trip means distance is divided in two equal parts

Q 4) A particle moving along x-axis has acceleration f, at time t, given by f = f0(1-t/T), where f0 and T 

       are constants. The particle at t = 0 has zero velocity. In the time interval between t = 0 and the 

       instant when f = 0, the particle's velocity (vx) is

Description : samsaya badi hai isliye focused rahna padega and upper limit in calculation of velocity 

                     kaise rakha , dhyaan se dekho

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