A Planet Is Made of Two Distinct Materials

question 57

Multiple Choice

A planet is made of two distinct materials.From the core to R/2,the density of the material is 4000 kg/m³,and from R/2 to R the density is 3000 kg/m³.What is the gravity at the surface of the planet if R = 5000 km?

• A)0.699 m/s²
• B)3.66 m/s²
• C)4.19 m/s²
• D)4.38 m/s²
• E)4.99 m/s²