Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    7
    ReputationRep:
    Hi can someone explain to me how to do this question?

    The speed of motion of a trolley before and after (1.7 ± 0.1)s of acceleration is measured. Before the acceleration, the trolley moved (100 ± 1)mm in (1.78 ± 0.01)s(; after the acceleration it moved the same distance in (0.74 ± 0.01)s. Calculate the relative uncertainty of the measured acceleration. (Equation: Acceleration=change in velocity/time taken to accelerate)

    Thanks
    • Community Assistant
    Offline

    21
    ReputationRep:
    (Original post by Hollster_Hol)
    Hi can someone explain to me how to do this question?

    The speed of motion of a trolley before and after (1.7 ± 0.1)s of acceleration is measured. Before the acceleration, the trolley moved (100 ± 1)mm in (1.78 ± 0.01)s(; after the acceleration it moved the same distance in (0.74 ± 0.01)s. Calculate the relative uncertainty of the measured acceleration. (Equation: Acceleration=change in velocity/time taken to accelerate)

    Thanks
    If I do this right, you have to consider the differences in your calculation. If you do, you have to consider the minimum and maximum value. The difference of speed of motion is 0.2 (1,76 the minimum, 1,78 the maximum). Analogous you calculate the other differences. For the distance of the trolley, it is 2, the time in which the trolley arrive this distance is 0,02 (after and before the acceleration).

    calculate the change of velocity first. It is d(v) = d(s)/d(t); d(s) = 2 mm and d(t) = 0,02 s

    After that you should be able to calculate the acceleration according to the given formula.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Will you be richer or poorer than your parents?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.