Chapter 12 Forces and Motion

The SI unit of force is?

• joule

• kilogram

• meter

• newton

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When an unbalanced force acts on an object?

• the object's motion does not change

• the object accelerates

• the weight of the object decreases

• the inertia of the object increases

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What kind of friction occurs as a fish swims through water?

• fluid

• rolling

• sliding

• static

The forces acting on a falling leaf are?

• air resistance and fluid friction

• gravity and air resistance

• gravity and static friction

• weight and rolling friction

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Figure 12-1 shows the motion of three balls. The curved paths followed by balls B and C are examples of?

• centripetal motion

• constant motion

• linear motion

• projectile motion

The property of matter that resists changes in motion is called?

• friction

• gravity

• inertia

• weight

According to Newton's second law of motion, the acceleration of an object equals the net force acting on the object divided by the object's?

• mass

• momentum

• velocity

• weight

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Your weight equals your?

• mass

• mass divided by the net force acting on you

• mass times the acceleration due to gravity

• mass times your speed

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Newton's third law of motion describes?

• action and reaction forces

• balanced forces

• centripetal forces

• net force

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The product of an object's mass and velocity is its?

• centripetal force

• momentum

• net force

• weight

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