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The acceleration due to gravity at the north pole of Neptune is approximately11.2m/s2. Neptune has mass1.021026km and radius2.46104km and rotates once around its axis in about 16 h.

(a) What is the gravitational force on a3.00 kgobject at the north pole of Neptune?

(b) What is the apparent weight of this same object at Neptune鈥檚 equator? (Note that Neptune鈥檚 鈥渟urface鈥 is gaseous, not solid, so it is impossible to stand on it.)

Short Answer

Expert verified

The apparent weight of the Neptune is 32.7 N.

Step by step solution

01

Identification of the given data

The given data can be listed below as,

  • The gravity is, =11.2m/s2
  • The mass is, =1.02106km
  • The radius is, =2.46104km2.46104km
  • The surface is gaseous, not solid, so it is impossible to stand on it.
02

The gravitational force on a object at north pole of Neptune

Gravitational force,

F = mg

Here, m is the mass of the Neptune, g is the gravity of the Neptune.

Substitute all the values in the above equation.

F=mgF=311.2=33.6N

03

The apparent weight of the object at Neptune’s equator

Apparent weight at the equator = m(g-a)

a = centripetal acceleration at equator = R2

16hr=57600s=2T=257600s=1.1104rad/seca=R蝇2=0.02461061.11042=0.2970.30m/s2

Apparent weight = m(g-a)

=3a11.2-0.3=32.7N

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