What is the kinetic energy of an a 7.1 kg sled with a velocity of 5.7 m/s?

Question

What is the kinetic energy of an a 7.1 kg sled with a velocity of 5.7 m/s?

in progress 0
Kim Chi 2 months 2021-07-31T08:24:55+00:00 2 Answers 1 views 0

Answers ( )

    0
    2021-07-31T08:26:30+00:00

    Answer:

    115.3395 j

    Explanation:

    K= 1/2mv²= (7.1/2)*5.7² = 115.3395 j

    0
    2021-07-31T08:26:46+00:00

    Answer:

    115.34 J

    General Formulas and Concepts:

    Energy

    Kinetic Energy Formula: \displaystyle KE = \frac{1}{2}mv^2

    • m is mass (in kg)
    • v is velocity (in m/s)

    Explanation:

    Step 1: Define

    Identify variables

    [Given] m = 7.1 kg

    [Given] v = 5.7 m/s

    [Solve] KE

    Step 2: Solve for KE

    1. Substitute in variables [Kinetic Energy Formula]:                                       \displaystyle KE = \frac{1}{2}(7.1 \ kg)(5.7 \ m/s)^2
    2. Evaluate exponents:                                                                                     \displaystyle KE = \frac{1}{2}(7.1 \ kg)(32.49 \ m^2/s^2)
    3. Multiply:                                                                                                         \displaystyle KE = (3.55 \ kg)(32.49 \ m^2/s^2)
    4. Multiply:                                                                                                         \displaystyle KE = 115.34 \ J

    Topic: AP Physics 1 – Algebra Based

    Unit: Energy

    Book: College Physics

Leave an answer

Browse

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