An ice skater with a mass of 50 kg is gliding acrossthe ice at a speed of 8 m/s when herfriend comes up from behind and gives her a push,cau

Question

An ice skater with a mass of 50 kg is gliding acrossthe ice at a speed of 8 m/s when herfriend comes up from behind and gives her a push,causing her speed to increase to 12m/s. How much work did the friend do on the skater

in progress 0
Bình An 4 years 2021-07-13T10:22:09+00:00 1 Answers 90 views 0

Answers ( )

  1. linhdan
    0
    2021-07-13T10:24:02+00:00
    Reply

    Answer:

    W=2KJ

    Explanation:

    From the question we are told that:

    Mass M=50kg

    Initial Velocity v_1=8m/s

    Final Velocity v_2=12m/s

    Generally the equation for Work-done is mathematically given by

    W=\triangle K.E

    Therefore

     W=0.5M(v_2^2-v_1^2)

     W=0.5*50(12^2-8^2)

     W=2KJ

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )