Forces Quiz: Clicker Review Practice MC Slide 2 W_L_E_ 1. Y E K
2. F Y A 3. G B I 4. O V S Slide 3 1. the truck exerts a greater
amount of force on the car than the car exerts on the truck. 2. the
car exerts a greater amount of force on the truck than the truck
exerts on the car. 3. neither exerts a force on the other, the car
gets smashed simply because it gets in the way of the truck. 4. the
truck exerts a force on the car but the car doesnt exert a force on
the truck. 5. the truck exerts the same amount of force on the car
as the car exerts on the truck. Slide 4 The motion of a car is
represented with the motion diagram below. Choose the FBD that
matches this situation. x x y x y x y x y 1. 2. 3. 4. Slide 5 1.
its weight vertically downward along with a steadily decreasing
upward force. 2. a steadily decreasing upward force from the moment
it leaves the hand until it reaches its highest point beyond which
there is a steadily increasing downward force of gravity as the
object gets closer to the earth. 3. a constant downward force of
gravity along with an upward force that steadily decreases until
the ball reaches its highest point, after which there is only the
constant downward force of gravity. 4. a constant downward force of
gravity only. 5. none of the above, the ball falls back down to
earth simply because that is its natural action. Slide 6 1. (A) 2.
(B) 3. (C) 4. (D) 5. (E) Slide 7 1. Equal to the speed v o it had
before it received the kick. 2. Equal to the speed v it acquires
from the kick and independent of the speed v o. 3. Equal to the
arithmetic sum of the speeds v o and v 4. Smaller than either of
speeds v o and v 5. Greater than either of speeds v o and v, but
smaller than the arithmetic sum of these two speeds. Slide 8 1. No
change 2. Continuously increasing 3. Continuously decreasing 4.
Increasing for a while, and decreasing thereafter 5. Constant for a
while, and decreasing thereafter Slide 9 1. The downward force due
to gravity and the effect of air pressure 2. The downward force of
gravity and the horizontal force of momentum in the direction of
motion 3. The downward force of gravity, the upward force exerted
by the table, and a horizontal force acting on the puck in the
direction of motion 4. The downward force of gravity and an upward
force exerted on the puck by the table 5. Gravity dos not exert a
force on the puck, it falls because of the intrinsic tendency of
the object to fall to its natural place Slide 10 1. neither student
exerts a force on the other. 2. student a exerts a force on b, but
b doesnt exert any force on a. 3. each student exerts a force on
the other but b exerts the larger force. 4. each student exerts a
force on the other but a exerts the larger force. 5. each student
exerts the same amount of force on the other. Slide 11 Mary pulls
on a lawnmower parallel to the surface so that it moves at a
constant speed up the hill. Construct an FBD that best represents
the motion of the mower. x y x y x y x y 1. 2. 3. 4. Slide 12 1. 1
only 2. 1 and 2 3. 1, 2, and 3 4. 1, 2, and 4 5. None of these,
since the book is at rest there are no forces acting on it Slide 13
1. the amount of force of the car pushing against the truck is
equal to that of the truck pushing back against the car. 2. the
amount of force of the car pushing against the truck is less than
that of the truck pushing back against the car. 3. the amount of
force of the car pushing against the truck is greater than that of
the truck pushing back against the car. 4. the cars engine is
running so it applies a force as it pushes against the truck but
the trucks engine is not running so it cant push back against the
car, the truck is pushed forward simply because it is in the way of
the car. 5. neither the car nor the truck exert any force on the
other, the truck is pushed forward simply because it is in the way
of the car. Slide 14 1. the amount of force of the car pushing
against the truck is equal to that of the truck pushing back
against the car. 2. the amount of force of the car pushing against
the truck is less than that of the truck pushing back against the
car. 3. the amount of force of the car pushing against the truck is
greater than that of the truck pushing back against the car. 4. the
cars engine is running so it applies a force as it pushes against
the truck but the trucks engine is not running so it cant push back
against the car, the truck is pushed forward simply because it is
in the way of the car. 5. neither the car nor the truck exert any
force on the other, the truck is pushed forward simply because it
is in the way of the car. Slide 15 1. the upward force on the
elevator by the cable is greater than the downward force of
gravity. 2. the amount of upward force on the elevator by the
cables is equal to that of the downward force of gravity. 3. the
upward force on the elevator by the cable is less than the downward
force of gravity. 4. it goes up because the cable is being
shortened, not because of the force being exerted on the elevator
by the cable. 5. the upward force on the elevator by the cable is
greater than the downward force due to the combined effects of air
pressure and the force of gravity. Slide 16 1. (A) 2. (B) 3. (C) 4.
(D) 5. (E) Slide 17 1. 1 only 2. 1 and 2 3. 1, 2, and 3 4. 1 and 3
5. 2 and 3 Slide 18 Which FBD below best represents the forces
exerted on the ball as it is moving UP (ignore air resistance)? 1.
2. 3. 4. Slide 19 1. (A) 2. (B) 3. (C) 4. (D) 5. (E) Slide 20 1.
constant. 2. continuously increasing. 3. continuously decreasing.
4. increasing for a while and constant thereafter. 5. constant for
a while and decreasing thereafter. Slide 21 1. (A) 2. (B) 3. (C) 4.
(D) 5. (E) Slide 22 1. constant. 2. continuously increasing. 3.
continuously decreasing. 4. increasing for a while and constant
thereafter. 5. constant for a while and decreasing thereafter.
Slide 23 Stacey pulls a mower at 40-degrees relative to the ground.
Which free body diagram best represents the forces on the mower if
she is accelerating? x 40 0 y y x y x x y 1. 2. 3. 4. Slide 24 1.
If the force applied to the box is doubled, the constant speed of
the box will increase to 8 m/s 2. The amount of force applied to
move the box at a constant speed must be more than its weight 3.
The amount of force applied to move the box at a constant speed
must be equal to the amount of the frictional forces that resist
its motion 4. The amount of force applied to move the box at a
constant speed must be more than the amount of the frictional
forces that resist its motion 5. There is a force being applied to
the box to make it move but the external forces such as friction
are not real forces they just resist motion Slide 25 1. stop
immediately. 2. continue at a constant speed for a very short
period of time and then slow to a stop. 3. immediately start
slowing to a stop. 4. continue at a constant velocity. 5. increase
its speed for a very short period of time, then start slowing to a
stop. Slide 26 Construct a speed versus time chart that best
represents this situation. x y v t v t v t v t 1. 2. 3. 4.
