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A man weighing 80 kg is standing on a tr...

A man weighing 80 kg is standing on a trolley weighing 320 kg. The trolley is resting on frictionless horizontal rails. If the man starts walking on the trolley along the rails at speed 1 m/s. Then after 4 s, his displacement relative to ground will be

A

4.5 m

B

5 m

C

8 m

D

3.2 m

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The correct Answer is:
D
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A man weighing 80 kg is standing on a trolley weighing 320 kg . The trolley is resting on frictionless horizontal rails. If the man starts walking on the trolley along the rails at speed 1 m//s (w.r.t. to trolley) then after 4 s his displacement relative to the ground will be :

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Knowledge Check

  • A man weighing 60 kg is standing on a trolley weighting 240 kg. The trolley is resting on frictionless horizontal rails. If the man starts walking on the trolley with a velocity of 1 m/s, then after 5s, his displacement relative to the ground is

    A
    `6m`
    B
    `4.8m`
    C
    `3.2m`
    D
    `2.4m`

  • A man of mass m is standing on a stationary flat car of mass M. The car can move without friction along horizontal rails. The man starts walking with velocity v relative to the car. Work done by him

    A
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    B
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    C
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    D
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  • A man of mass m is standing on a plank of equal mass m resting on a smooth horizontal surface. The man starts moving on the plank with speed u relative to the plank. The speed of the man relative to the ground is

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    2u
    B
    `u/2`
    C
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    D
    `u/4`

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