1. Prevailing theory says that planets may form from particles in space collecting together due to their own gravitational pull. If a 1200kg asteroid travelling towards its sun at 200m/s collides with a 2400kg asteroid travelling outwards from the sun at 1000m/s, calculate the speed and direction of the resulting, larger asteroid, if they both stick together.

a. 600 m/s, away from the sun

b.600 m/s, toward from the sun

c.1200 m/s, away from the sun

d.1200 m/s, toward from the sun 2. A 200 Newton net force is applied to a tractor in a field. If the 10,000 kg tractor starts off at rest and ends up travelling with a speed of 2m/s. How long has this force been applied to the tractor?

a. 100s

b. 75s

c. 83s

d. 50s

3. In an inelastic collision, what formula would you use in analyzing the collision? Because you may be asked to solve for any of the variables in a given problem, please give the entire formula. Use m1 and m2 for the masses of the objects, v1 and v2 for the initial speeds, and vf for the speed of the combined mass.

4. An object is pushed with a force of 9.0 N for 0.30 s. What impulse is given to it?

a. 9 N-s

b. .09 N-s

c..3 N-s

d. 2.7 N-s

5.A 10.0 kg block travelling to the right at 5.00 m/s, collides and sticks to a 3.00 kg block travelling to the left at 7.00 m/s. What is the speed and direction of the combined mass?

a.2.9 m/s , to the left

b. 2.9 m/s , to the right

c.2.23 m/s , to the right

d. 2.23 m/s , to the left