Unit 1 part 2 Test Review

The SI Unit for force is the _________.

• Joule

• Newton

• kilogram

• meter

Which of the relationships is correct?

When an unbalanced force acts on an object, _________

• The inertia of the object increases.

• The weight of the object decreases.

• The object's motion does not change.

• The object accelerates.

What kind of friction ouccrs as a swimmer moves through the water?

• rolling

• static

• sliding

• fluid

As you push a pizza across a table top to your friend, the sliding friction acting on the pizza _________

• acts in the opposite dierction of motion.

• equals the weight of the pizza.

• acts in the same direction of motion.

• is never greater than static friction.

The property of matter that resists changes in motion is called_________.

• friction

• weight

• inertia

• gravity

According to Newton's 2nd Law of Motion, the acceleration of an object equals the net force acting on the object divided by the object's ______________.

• weight.

• velocity.

• mass.

• momentum.

Newton's 3rd Law of Motion describes:

• action and reaction forces.

• centripital force.

• net force.

• balanced forces.

In which of the following are action and reaction forces invovled?

• when jumping on a trapoline.

• when a bat strikes a baseball.

• when rowing a canoe.

• all of these are correct.

What is the momentum of a 45 - kilogram ice skater gliding across the ice at a speed of 3 m/s?

• 48 kgm/s

• 15 kgm/s

• 135 kgm/s

• 125 kgm/s