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3 years ago

12

A compact car with a mass of 1,000 kg, traveling at 15 m/s, runs into and sticks to - an at-rest SUV of 2,200 kg. What is the fi

nal speed of the two cars? A. 4.7 m/s B. 67 m/s C. 2.2 m/s D. 147 m/s

1 answer:

zepelin [54]3 years ago

4 0

Roughly 4.7 m/s this would be a momentum argument as well

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4 years ago

Read 2 more answers

For a bronze alloy, the stress at which plastic deformation begins is 267 MPa and the modulus of elasticity is 115 GPa. (a) What

choli [55]

Answer

given,

Stress for plastic deformation = 267 MPa

modulus of elasticity = 115 GPa

cross sectional area = 377 mm²

a) maximum load (in N) that may be applied to a specimen

= σ x A

= 267 x 10⁶ x 377 x 10⁻⁶

= 100659 N

b) modulus of elasticity = stress/strain

115 x 10⁹ = $\dfrac{267 \times 10^6}{\dfrac{\Delta l}{L}}$

L = 127 mm

115 x 10⁹ = $\dfrac{267 \times 10^6}{\dfrac{\Delta l}{127}}$

$\dfrac{\Delta l}{127}=\dfrac{267 \times 10^6}{115\times 10^9}$

Δ l = 0.295 mm

maximum length after the stretched = 127 mm + 0.295 mm

= 127.295 mm

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3 years ago