Justin Thyme is traveling down Lake Avenue at 32.8 m/s in his 1510-kg 1992 Camaro. He spots a police car with a radar gun and quickly slows

Question

Justin Thyme is traveling down Lake Avenue at 32.8 m/s in his 1510-kg 1992 Camaro. He spots a police car with a radar gun and quickly slows down to a legal speed of 20.1 m/s. Determine the amount of work done on the Camaro during the deceleration.

in progress 0
Gia Bảo 4 years 2021-08-25T17:52:41+00:00 1 Answers 6 views 0

Answers ( )

  1. Ladonna
    0
    2021-08-25T17:54:27+00:00
    Reply

    Answer:

    507000 J

    Explanation:

    According to the work-kinetic energy theorem, the work done is the change in kinetic energy.

    W = KE_2 - KE_1

    KE_1 =\frac{1}{2}\times1510\times32.8^2 \text{ J}

    KE_2 =\frac{1}{2}\times1510\times20.1^2 \text{ J}

    W = \frac{1}{2}\times1510\times(20.1^2 - 32.8^2)\text{ J} = -507231.65 \text{ J}

    The negative sign indicates work was done on the car.

Leave an answer

Browse

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