3. Ms. Johnson can bench press 150 kg from 0.7 m from the ground to 1.5 m above the ground. a. How much weight (not mass) did Ms. Johnson li

Question

3. Ms. Johnson can bench press 150 kg from 0.7 m from the ground to 1.5 m above the ground. a. How much weight (not mass) did Ms. Johnson lift? Put down Givens, Solving For, Equation, Substitution, Answer with Units
b. How much power did she use if she lifts the weights in 10s? Put down Givens, Solving For, Equation, Substitution, Answer with Units

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Adela 4 years 2021-08-02T19:49:53+00:00 1 Answers 85 views 0

Answers ( )

  1. thienthi
    0
    2021-08-02T19:50:55+00:00
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    Explanation:

    a. Given:

    m = 150 kg

    a = 9.8 m/s²

    Solving for: F

    Equation: F = ma

    Substitution: F = (150 kg) (9.8 m/s²)

    Answer: F = 1470 N

    b. Given:

    y₀ = 0.7 m

    y = 1.5 m

    F = 1470 N

    t = 10 s

    Solving for: P

    Equation: P = F Δy / Δt

    Substitution: P = (1470 N) (1.5 m − 0.7 m) / 10 s

    Answer: P = 117.6 W

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