Question

Notify Me Bookmark

(a) A sphere made of wood has a density of 0.810 g/cm3 and a radius of 8.50 cm. It falls through air of density 1.20 kg/m3 and has a drag coefficient of 0.500 . What is its terminal speed (in m/s )? m/s (b) From what height (in m ) would the sphere have to be dropped to reach this speed if it fell without air resistance? m

(a) A sphere made of wood has a density of 0.810 g/cm3 and a radius of 8.50 cm. It falls through air of density 1.20 kg/m3 and has a drag coefficient of 0.500 . What is its terminal speed (in m/s )? m/s (b) From what height (in m ) would the sphere have to be dropped to reach this speed if it fell without air resistance? m

Image text
(a) A sphere made of wood has a density of 0.810 g / c m 3 and a radius of 8.50 c m . It falls through air of density 1.20 k g / m 3 and has a drag coefficient of 0.500 . What is its terminal speed (in m / s )? ◻ m / s (b) From what height (in m ) would the sphere have to be dropped to reach this speed if it fell without air resistance? ◻ m

Detailed Answer

0 0

Please enter your email here. You will get email when this question is answered by our tutor.

Doubtrix Logo

Problem is not yet solved!

Click on Notify me to get email when question is answered.

Join Doubtrix with 7-days free trial

  • Icon Correct & Verified Answers
  • Icon No AI-Generated Answers
  • Icon Video Solution for Difficult Questions
  • Icon Work With Experts to Reach at Correct Answers
Notify me Login Sign Up

Similar/Related Questions

(a) A small plastic bead with a charge of −60.0 nC is at the center of an insulating rubber spherical shell with an inner radius of 20.0 cm and an outer radius of 27.0 cm. The rubber material of the spherical shell is charged, with a uniform volume charge density of −1.30 μC/m3. A proton moves in a circular orbit just outside the spherical shell. What is the speed of the proton (in m/s )? m/s (b) What If? Suppose the spherical shell carries a positive charge density instead. What is the maximum value the charge density (in μC/m3 ) the spherical shell can have below which a proton can orbit the spherical shell? μC/m3

Solution
0 0

In downhill speed skiing a skier is retarded by both the air drag force on the body and the kinetic frictional force on the skis. Suppose the slope angle is θ = 42.0∘, the snow is dry snow with a coefficient of kinetic friction μk = 0.0430, the mass of the skier and equipment is m = 87.0 kg, the cross-sectional area of the (tucked) skier is A = 1.30 m2, the drag coefficient is C = 0.160, and the air density is 1.20 kg/m3. (a) What is the terminal speed? (b) If a skier can vary C by a slight amount dC by adjusting, say, the hand positions, what is the corresponding variation in the terminal speed? Give your answer in terms of the given values and dC (need derivative for given values). (a) Number Units (b) Number dC Units
Solution
0 0

After the Sun exhausts its nuclear fuel, its ultimate fate will be to collapse to a white dwarf state. In this state, it would have approximately the same mass as it has now, but its radius would be equal to the radius of the Earth. (a) Calculate the average density of the white dwarf (in kg/m3). kg/m3 (b) Calculate the surface free-fall acceleration (in m/s2 ). m/s2 (c) Calculate the gravitational potential energy (in J) associated with a 1.82 kg object at the surface of the white dwarf. J (d) What If? The escape speed from the "surface" of the Sun, or a distance equal to its radius, is 617.5 km/s. What would be the escape speed (in km/s ) from the surface of the white dwarf? km/s

Solution
0 0