Prove that acceleration due to gravity on earth is 9.8 m/s2. ( Given : G = 6.67 X 10 -11 Nm2/kg2 , mass of earth = 6 X 10 24 kg
Radius of earth = 6.4 X 10 6 m )

Figure 9 on page 362 shows various motions of balls. the curved path followed by the yellow ball in b in picture b is result of a) inertia b) centripetal motion c) gravity and horizontal velocity d) linear motion

What effects result when there is an impact between earth and an asteroid? check all that apply. a.massive flooding. b.extinction of many life forms.c.major earthquakes change in average global temperature.d. giant dust cloud

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.