A girl rides her bike 5.1 km due east. While riding she experiences a resistive force from the air that has a magnitude of 2.8 N and points

Question

A girl rides her bike 5.1 km due east. While riding she experiences a resistive force from the air that has a magnitude of 2.8 N and points due west. She then turns around and rides due west, back to her starting point. The resistive force from the air on the return trip has a magnitude of 3.2 N and points due east.(a) Find the work done by the resistive force during the round trip.

in progress 0
Khánh Gia 4 years 2021-08-01T16:40:19+00:00 1 Answers 14 views 0

Answers ( )

  1. Bo
    0
    2021-08-01T16:41:37+00:00
    Reply

    Answer:

    The work done by the resistive force during the round trip is -30,600 J

    Explanation:

    A round trip is to and fro.

    To:      5.1 km →     ← R₁ = 2.8 N

    Fro:     → R₂ = 3.2 N     ← 5.1 km

    5.1 km = 5,100 m

    ∴ Work done = -2.8 x 5,100 -3.2 x 5,100

                          = -14,280 – 16,320

                          = -30,600 J

Leave an answer

Browse

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