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Physics · Oct / Nov 2023 · Paper 41 · Question 1

0625

As printed in the paper

The question as text

A girl holds a rubber ball out of a window of a tall building. The mass of the ball is 0.20 kg. The ball is at rest 10 m above a concrete path.

Read automatically from the paper; the printed page above is exact.

Show the answer and mark scheme

  • 1(a)[2]

    20 J

    (Δ.Ep =) mg(Δ)h OR

    ( )

    0.2 0 9.8 1 0

  • 1(b)(i)[2]

    14 J

    (Ek =) ½mv2 OR ½ × 0.2(0) × 122

  • 1(b)(ii)[3]

    p = mv OR (Δp =) mv−mu

    (Δp =)

    ( )

    ( )
    −−

    0.2 0

    14

    12

    OR

    0.2 0

    {14

    12

    OR

    p before = 0.2(0) × 14 AND p after = 0.2(0) × (–)12

    (Δp =)

    −−

    (= 5.2 kg m / s) OR (Δp =)

    ( )

    −−
    2.8

    2.4

    0.2 0

    14

    12

  • 1(b)(iii)[2]

    21 N

    (F =) Δp / ( Δ)t OR F = (∆)mv / (∆)t OR 5.2 / 0.25

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