Forces and Motion

The SI unit for force is the

• joule

• kilogram

• meter

• newton

An open parachute increases air resistance of a falling sky diver by

• decreasing the weight of the diver

• increasing surface area

• increasing the terminal velocity

• reducing fluid friction

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

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

• fluid

• rolling

• sliding

• static

The force acting on a falling leaf are

• air resistance and fluid friction

• gravity and air resistance

• gravity and static friction

• weight and rolling friction

When a pair of balanced forces act on an object, the net force that results is

• greater in size than both forces combined

• greater in size than one of the forces

• equal in size to one of the forces

• equal to zero

As you push a cereal box across a tabletop, the sliding friction acting on the cereal box

• acts in the direction of motion

• equals the weight of the box

• is usually greater than static friction

• acts in the direction opposite of motion

Which of the following relationships is correct?

• 1 N = 1 kg

• 1 N = 1 kg⋅m

• 1 N = 1 kg⋅m/s

• 1 N = 1 kg⋅m/s²

The property of matter that resists changes in motion is called

• friction

• gravity

• inertia

• weight

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