1.)The gravitational pull of the sun on earth keeps earth orbiting around the sun. Which statement is correct about the force that Earth exerts on the sun? A.)Earth pulls the sun away from its self with a force equal to the ratio of the mass of the sun to the mass of earth.
B.) Earth pulls the sun away from itself with an equal force.
C.) Earth pulls the sun toward itself with a force equal to the ratio of the mass of the sun to the mass of earth.
D.) Earth pulls the sun toward itself with an equal force.

2.) A paper pin wheel is spinning in the wind. Which statement is correct about the force is responsible for the rotation?
A.) The components of gravity and the force of wind the point through the pivot are responsible for the rotation.
B.) The perpendicular components of gravity and the force of winds are responsible for the rotation.
C.) only the perpendicular component of gravity is responsible for the rotation, because win points towards the pivot.
D.) only the perpendicular component of wind is responsible for the rotation, because gravity points downward.

3.) which statement about kinetic and static friction is accurate?
A.) static friction is greater than kinetic friction but they both act opposite the applied force.
B.) kinetic friction is greater than static friction and they both act in conjunction with the applied force.
C.) kinetic friction is greater than static friction but they both act opposite be applied force.
D.) static friction is greater than kinetic friction and they both act in conjunction with the applied force

4.) A group of engineers are preparing a satellite to land by moving it 10% closer to earth in each rotation. Which statement is correct about the rotational inertia of the satellite?
A.) rotational inertia does not change because it is conserved.
B.) rotational inertia increases proportional to the decrease in the radius of rotation.
C.) rotational inertia first decreases and then increases as the satellite is ready to land.
D.) rotational inertia decreases proportional to the decrease in the radius of rotation.