ARNY Chapter 3

QFR

3. Inertia and gravity are both involved in an orbit because the balance between inertia the force of gravity maintains the orbit.

7. Newton’s law of gravity is that every mass exerts a force of attraction on every other mass. The strength of the force is directly proportional to the product of the masses divided by the square of their separation.

PR

11. 2.38km/sec/11.2km/sec

STIMETS Chapter 3

QUES

3. The accelerations of two interacting bodies, A and B are equal when they interact via some force and no other forces act on either of them.

7. The escape velocity of a planet tells us what a planet’s atmosphere might be like.

PR

1. A=1.66m/s^2