g A child pulls a friend in a little red wagon with constant speed. If the child pulls with a force of 17.0 N for 14.0 m, and the handle of

Question

g A child pulls a friend in a little red wagon with constant speed. If the child pulls with a force of 17.0 N for 14.0 m, and the handle of the wagon is inclined at an angle of 22° above the horizontal, how much work does the child do on the wagon?

in progress 0
Diễm Kiều 5 months 2021-08-11T11:13:07+00:00 1 Answers 4 views 0

Answers ( )

    0
    2021-08-11T11:14:25+00:00

    Answer:

    220.67 J.

    Explanation:

    Work: This can be defined as the product of force and its horizontal distance along the direction of force. The S.I unit of work is Joules (J).

    The expression for work done is given as,

    W = F×dcosФ……………….. Equation 1

    Where W = work done by the child, F = Force, d = distance, Ф = angle to the horizontal

    Given: F = 17 N, d = 14 m, Ф = 22°

    Substitute into equation 1

    W = 17(14)cos22°

    W = 220.67 J.

    Hence the child does a work of 220.67 J on the wagon

Leave an answer

Browse

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