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Questions 7-10 please. Please show work it would be preferable. Thank you.

Questions 7-10 please. Please show work it would be preferable. Thank you.-example-1

2 Answers

1 vote

Answer:

7/ 0.3

10/ 0.35N

I don't know about 8 and 9

sorry for that.

User Adnan Boz
by
5.4k points
6 votes

Answer:

7. 0.333

8. 29,400 N

9. 91,800 m³

10. 0.84 N

Step-by-step explanation:

7. Friction force = normal force × coefficient of friction

F = Nμ

(50 N) = (150 N) μ

μ = 0.333

8. Buoyant force = weight of displaced fluid.

B = ρVg

B = (1000 kg/m³) (3 m³) (9.8 m/s²)

B = 29,400 N

9. For an object to float, buoyant force = weight of object.

B = W

ρVg = mg

ρV = m

V = m / ρ

V = (91,800,000 kg) / (1000 kg/m³)

V = 91,800 m³

10. Apply Newton's second law:

∑F = ma

F − W = ma

F − mg = ma

F = mg + ma

F = m (g + a)

F = (0.050 kg) (9.8 m/s² + 7 m/s²)

F = 0.84 N

User KMLong
by
5.6k points