Physical Science Ch 12 Forces Question Preview (ID: 17999)


Ch 12 Review. TEACHERS: click here for quick copy question ID numbers.

The SI unit of force is the
a) joule
b) kilogram
c) meter
d) newton

Which of the following relationships is correct?
a) 1 N =1 kg
b) 1 N = 1 kg x ,m
c) 1 N = 1 kg x m/s
d) 1 N = 1 kg x m/s2

When an unbalanced force acts on an object,
a) the object's motion does not change
b) the object accelerates
c) the weight of the object decreases
d) the inertia of the object increases.

When a pair of balancedforces act so an object, the net force that results is
a) greater in size than both forces combined.
b) greater in size than one of the forces.
c) equal in size to one of the forces
d) equal to zero.

What kind of friction occurs as a fish swims through water?
a) fluid
b) rolling
c) sliding
d) static

As you push a cereal box across a tabletop, the sliding friction acting on the cereal box
a) acts in the direction of motion.
b) equals the weight of the box.
c) is usually greater than static friction.
d) acts in the direction opposite of motion.

The forces acting on a falling leaf are
a) air resistance and fluid friction
b) gravity and air resistance
c) gravity and static friction
d) weight and rolling friction.

An open parachute increases air resistance of a falling sky diver by
a) decreasing the weight of the diver
b) increasing surface area
c) increasing the terminal velocity
d) reducing fluid friction

Projectile motion is caused by
a) the downward force of gravity.
b) an initial forward velocity
c) a final vertical velocity
d) the downward force of gravity and an initial forward velocity.

The property of matter that resists changes in motion is called
a) friction
b) gravity
c) inertia
d) weight

An orange might roll off your cafeteria tray when you stop suddenly because of
a) the balanced forces acting on the orange
b) the centripetal force acting on the orange
c) the friction forces acting on the orange
d) the orange's inertia

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
a) mass
b) momentum
c) velocity
d) weight

If a force of 12 N is applied to an object with a mass of 2 kg, the object will accelerate at
a) 0.17 m/s2
b) 24 m/s2
c) 6 m/s2
d) 12 m/s2

Your weight equals your
a) mass
b) mass divided by the net force acting on you.
c) mass times the acceleration due to gravity
d) mass times your speed

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