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Physical Science Ch 12 Forces
Test Description: Ch 12 Review
Instructions: Answer all questions to get your test result.
1) The SI unit of force is the
A
newton
B
meter
C
joule
D
kilogram
2) Which of the following relationships is correct?
A
1 N = 1 kg x m/s
B
1 N = 1 kg x m/s2
C
1 N = 1 kg x ,m
D
1 N =1 kg
3) When an unbalanced force acts on an object,
A
the object accelerates
B
the object's motion does not change
C
the weight of the object decreases
D
the inertia of the object increases.
4) When a pair of balancedforces act so an object, the net force that results is
A
equal to zero.
B
greater in size than both forces combined.
C
equal in size to one of the forces
D
greater in size than one of the forces.
5) What kind of friction occurs as a fish swims through water?
A
sliding
B
fluid
C
static
D
rolling
6) As you push a cereal box across a tabletop, the sliding friction acting on the cereal box
A
equals the weight of the box.
B
acts in the direction of motion.
C
acts in the direction opposite of motion.
D
is usually greater than static friction.
7) The forces acting on a falling leaf are
A
gravity and static friction
B
air resistance and fluid friction
C
weight and rolling friction.
D
gravity and air resistance
8) An open parachute increases air resistance of a falling sky diver by
A
increasing surface area
B
increasing the terminal velocity
C
reducing fluid friction
D
decreasing the weight of the diver
9) Projectile motion is caused by
A
the downward force of gravity and an initial forward velocity.
B
an initial forward velocity
C
a final vertical velocity
D
the downward force of gravity.
10) The property of matter that resists changes in motion is called
A
friction
B
gravity
C
weight
D
inertia
11) An orange might roll off your cafeteria tray when you stop suddenly because of
A
the orange's inertia
B
the centripetal force acting on the orange
C
the balanced forces acting on the orange
D
the friction forces acting on the orange
12) 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
velocity
B
mass
C
weight
D
momentum
13) If a force of 12 N is applied to an object with a mass of 2 kg, the object will accelerate at
A
24 m/s2
B
6 m/s2
C
12 m/s2
D
0.17 m/s2
14) Your weight equals your
A
mass times the acceleration due to gravity
B
mass divided by the net force acting on you.
C
mass times your speed
D
mass
*select an answer for all questions
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