JEE Main & Advanced Physics Motion in a Straight Line / सरल रेखा में गति Question Bank

done Uniform Motion Total Questions - 24

• question_answer1)
  A person travels along a straight road for half the distance with velocity \[{{v}_{1}}\] and the remaining half distance with velocity \[{{v}_{2}}\].The average velocity is given by [MP PMT 2001]
  A)
   \[{{v}_{1}}{{v}_{2}}\]       done clear
  B)
    \[\frac{v_{2}^{2}}{v_{1}^{2}}\] done clear
  C)
    \[\frac{{{v}_{1}}+{{v}_{2}}}{2}\] done clear
  D)
             \[\frac{2{{v}_{1}}{{v}_{2}}}{{{v}_{1}}+{{v}_{2}}}\] done clear
  View Solution play_arrow

• question_answer2)
   The displacement-time graph for two particles A and B are straight lines inclined at angles of \[{{30}^{o}}\] and \[{{60}^{o}}\] with the time axis. The ratio of velocities of \[{{V}_{A}}:{{V}_{B}}\] is   [CPMT 1990; MP PET 1999; MP PET 2001; Pb. PET 2003]
  A)
    \[1:2\] done clear
  B)
    \[1:\sqrt{3}\] done clear
  C)
   \[\sqrt{3}:1\]   done clear
  D)
    \[1:3\] done clear
  View Solution play_arrow

• question_answer3)
  A car travels from A to B at a speed of \[20\,\,km/hr\] and returns at a speed of \[30\,\,km/hr\]. The average speed of the car for the  whole journey is                               [MP PET 1985]
  A)
    \[25\,\,km/hr\] done clear
  B)
                  \[24\,\,km/hr\] done clear
  C)
          \[50\,\,km/hr\]       done clear
  D)
        \[5\,\,km/hr\] done clear
  View Solution play_arrow

• question_answer4)
  A boy walks to his school at a distance of 6 km with constant speed of 2.5 km/hour and walks back with a constant speed of 4 km/hr. His average speed for round trip expressed in km/hour, is                          [AIIMS 1995]
  A)
          24/13       done clear
  B)
         40/13 done clear
  C)
          3  done clear
  D)
        ½ done clear
  View Solution play_arrow

• question_answer5)
  A car travels the first half of a distance between two places at a speed of 30 km/hr and the second half of the distance at 50 km/hr. The average speed of the car for the whole journey is          [Manipal MEE 1995; AFMC 1998]
  A)
          42.5 km/hr           done clear
  B)
         40.0 km/hr done clear
  C)
          37.5 km/hr done clear
  D)
                 35.0 km/hr done clear
  View Solution play_arrow

• question_answer6)
  One car moving on a straight road covers one third of the distance with 20 km/hr and the rest with 60 km/hr. The average speed is           [MP PMT 1999; CPMT 2002]
  A)
          40 km/hr done clear
  B)
                  80 km/hr done clear
  C)
          \[46\frac{2}{3}\] km/hr done clear
  D)
                 36 km/hr done clear
  View Solution play_arrow

• question_answer7)
  A car moves for half of its time at 80 km/h and for rest half of time at 40 km/h. Total distance covered is 60 km. What is the average speed of the car                           [RPET 1996]
  A)
          60 \[km/h\] done clear
  B)
                  80 \[km/h\] done clear
  C)
          120 \[km/h\] done clear
  D)
                 180 \[km/h\] done clear
  View Solution play_arrow

• question_answer8)
  A train has a speed of 60 km/h. for the first one hour and 40 km/h for the next half hour. Its average speed in km/h is             [JIPMER 1999]
  A)
          50            done clear
  B)
         53.33 done clear
  C)
          48            done clear
  D)
        70 done clear
  View Solution play_arrow

• question_answer9)
  Which of the following is a one dimensional motion?                     [BHU 2000; CBSE PMT 2001]
  A)
          Landing of an aircraft done clear
  B)
         Earth revolving a round the sun done clear
  C)
          Motion of wheels of a moving trains done clear
  D)
        Train running on a straight track done clear
  View Solution play_arrow

• question_answer10)
  A 150 m long train is moving with a uniform velocity of 45 km/h. The time taken by the train to cross a bridge of length 850 meters is                             [CBSE PMT 2001]
  A)
          56 sec done clear
  B)
                  68 sec done clear
  C)
          80 sec done clear
  D)
                 92 sec done clear
  View Solution play_arrow

• question_answer11)
  A particle is constrained to move on a straight line path. It returns to the starting point after 10 sec. The total distance covered by the particle during this time is 30 m. Which of the following statements about the motion of the particle is false?      [CBSE PMT 2000; AFMC 2001]
  A)
          Displacement of the particle is zero done clear
  B)
         Average speed of the particle is 3 m/s done clear
  C)
          Displacement of the particle is 30 m done clear
  D)
        Both   (a)       and        (b) done clear
  View Solution play_arrow

• question_answer12)
  A particle moves along a semicircle of radius 10m in 5 seconds. The average velocity of the particle is          [Kerala (Engg.) 2001]
  A)
          \[2\pi \ m{{s}^{-1}}\] done clear
  B)
                  \[4\pi \ m{{s}^{-1}}\] done clear
  C)
          \[2\ m{{s}^{-1}}\] done clear
  D)
                 \[4\ m{{s}^{-1}}\] done clear
  View Solution play_arrow

• question_answer13)
  A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km/h. Finding the market closed, he instantly turns and walks back home with a speed of 7.5 km/h. The average speed of the man over the interval of time 0 to 40 min. is equal to                        [AMU (Med.) 2002]
  A)
          5 km/h     done clear
  B)
         \[\frac{25}{4}\] km/h done clear
  C)
          \[\frac{30}{4}\] km/h done clear
  D)
                 \[\frac{45}{8}\] km/h done clear
  View Solution play_arrow

• question_answer14)
  The ratio of the numerical values of the average velocity and average speed of a body is always                    [MP PET 2002]
  A)
          Unity        done clear
  B)
         Unity or less done clear
  C)
          Unity or more      done clear
  D)
        Less than unity done clear
  View Solution play_arrow

• question_answer15)
  A person travels along a straight road for the first half time with a velocity \[{{v}_{1}}\] and the next half time with a velocity \[{{v}_{2}}\] . The mean velocity \[V\] of the man is              [RPET 1999; BHU 2002]
  A)
          \[\frac{2}{V}=\frac{1}{{{v}_{1}}}+\frac{1}{{{v}_{2}}}\] done clear
  B)
                  \[V=\frac{{{v}_{1}}+{{v}_{2}}}{2}\] done clear
  C)
          \[V=\sqrt{{{v}_{1}}{{v}_{2}}}\]        done clear
  D)
        \[V=\sqrt{\frac{{{v}_{1}}}{{{v}_{2}}}}\] done clear
  View Solution play_arrow

• question_answer16)
  If a car covers 2/5th of the total distance with v1 speed and 3/5th distance with v2 then average speed is          [MP PMT 2003]
  A)
          \[\frac{1}{2}\sqrt{{{v}_{1}}{{v}_{2}}}\]      done clear
  B)
         \[\frac{{{v}_{1}}+{{v}_{2}}}{2}\] done clear
  C)
          \[\frac{2{{\upsilon }_{1}}{{\upsilon }_{2}}}{{{\upsilon }_{1}}+{{\upsilon }_{2}}}\] done clear
  D)
        \[\frac{5{{\upsilon }_{1}}{{\upsilon }_{2}}}{3{{\upsilon }_{1}}+2{{\upsilon }_{2}}}\] done clear
  View Solution play_arrow

• question_answer17)
  Which of the following options is correct for the object having a straight line motion represented by the following graph                           [DCE 2004]            
  A)
                                    The object moves with constantly increasing velocity from O to A and then it moves with constant velocity.             done clear
  B)
                     Velocity of the object increases uniformly             done clear
  C)
                       Average velocity is zero               done clear
  D)
                    The graph shown is impossible done clear
  View Solution play_arrow

• question_answer18)
  The numerical ratio of displacement to the distance covered is always                        [BHU 2004]
  A)
                       Less than one             done clear
  B)
                      Equal to one             done clear
  C)
                       Equal to or less than one           done clear
  D)
                Equal to or greater than one done clear
  View Solution play_arrow

• question_answer19)
  A 100 m long train is moving with a uniform velocity of 45 km/hr. The time taken by the train to cross a bridge of length 1 km is                          [BHU 2004]
  A)
                       58 s                     done clear
  B)
                      68 s             done clear
  C)
                      78 s                      done clear
  D)
                     88 s             done clear
  View Solution play_arrow

• question_answer20)
  A particle moves for 20 seconds with velocity 3 m/s and then velocity 4 m/s for another 20 seconds and finally moves with velocity 5 m/s for next 20 seconds. What is the average velocity of the particle                             [MH CET 2004]
  A)
                       3 m/s                  done clear
  B)
                     4 m/s             done clear
  C)
                       5 m/s                  done clear
  D)
                    Zero done clear
  View Solution play_arrow

• question_answer21)
  The correct statement from the following is      [MP PET 1993]
  A)
          A body having zero velocity will not necessarily have zero acceleration done clear
  B)
         A body having zero velocity will necessarily have zero acceleration done clear
  C)
          A body having uniform speed can have only uniform acceleration done clear
  D)
        A body having non-uniform velocity will have zero acceleration done clear
  View Solution play_arrow

• question_answer22)
  A bullet fired into a fixed target loses half of its velocity after penetrating 3 cm. How much further it will penetrate before coming to rest assuming that it faces constant resistance to motion?                      [AIEEE 2005]            
  A)
                      1.5 cm                 done clear
  B)
                     1.0 cm             done clear
  C)
                      3.0 cm                 done clear
  D)
                    2.0 cm done clear
  View Solution play_arrow

• question_answer23)
  Two boys are standing at the ends A and B of a ground where \[AB=a\]. The boy at B starts running in a direction perpendicular to AB with velocity \[{{v}_{1}}.\] The boy at A starts running simultaneously with velocity \[v\] and catches the other boy in a time t, where t is                 [CBSE PMT 2005]
  A)
                      \[a/\sqrt{{{v}^{2}}+v_{1}^{2}}\]                done clear
  B)
                     \[\sqrt{{{a}^{2}}/({{v}^{2}}-v_{1}^{2})}\]             done clear
  C)
                             \[a/(v-{{v}_{1}})\]                     done clear
  D)
                    \[a/(v+{{v}_{1}})\] done clear
  View Solution play_arrow

• question_answer24)
  A car travels half the distance with constant velocity of 40 kmph and the remaining half with a constant velocity of 60 kmph. The average velocity of the car in kmph is                                                 [Kerala PMT 2005]            
  A)
                               40                        done clear
  B)
                     45             done clear
  C)
                      48                            done clear
  D)
                    50 done clear
  View Solution play_arrow