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

Question

Brandon Walter

Physics

23 October, 09:12

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

+3

Answers (1)

Know the Answer?

Elian Ross · Answer 1

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