l. Which of the following statements are true about momentum?

a. Momentum is a vector quantity.

b. The standard unit on momentum is the Joule. F

c. An object with mass will have momentum. F

d. An object which is moving at a constant speed has momentum. -r

e. If an object is traveling eastward and slowing down; its momentum is westward.

f. Momentum is a conserved quantity; the momentum of an object is never changed. F )

g. The momentum of an object varies directly with the speed of the object.

h. Two objects of different mass are moving at the same speed; the more massive object will have the

greatest momentum.

i. A less massive object can never have more momentum than a more massive object.

j. An object with a changing speed will have a changing momentum.

2. Which of the following statements are true about impulse? /9

a. Impulse is a force.

b. Impulse is a vector quantity.

c. An object which is traveling east would experience a westward directed impulse in a collision. T i

d. Objects involved in collisions encounter impulses.

e. The Newton is the unit for impulse. V

f. The kg•m/s is equivalent to the units for impulse. -f

g. An object which experiences a net impulse will definitely experience a momentum change.fi¯

h. In a collision, the net impulse experienced by an object is equal to its momentum change.

i. A force of 100 N acting for 0.1 seconds would provide an equivalent impulse as a force of 5 N acting for

2.0 seconds.

O

3. Which of the following statements are true about collisions? /9

Two colliding objects will exert equal forces upon each other even if their mass is significantly different.

b. During a collision, an object always encounters an impulse and a change in momentum.

c. The velocity change of two respective objects involved in a collision will always be equal.

d. While individual objects may change their velocity during a collision, the overall or total velocity of the

colliding objects is conserved.

e. In an isolated system the total momentum is always conserved between any two objects involved in a

collision.

When a moving object collides with a stationary object of identical mass, the stationary object

encounters the greater collision force.

When a moving object collides with a stationary object of identical mass, the stationary object

encounters the greater momentum change.

A moving object collides with a stationary object; the stationary object has significantly less mass. The

stationary object encounters the greater collision force.

A moving object collides with a stationary object; the stationary object has significantly less mass. The

stationary object encounters the greater momentum change.

4. Which of the following objects have momentum? Include all that apply. /5

An electron is orbiting the nucleus of an atom.

A UPS truck is stopped in front of the school building.

c. A Yugo (a compact car) is moving with a constant speed. L/

d. A small flea walking with constant speed across Ficlo's back.

e. The high school building rests in the middle of town.