What is the unit for force ? kg . m kg . m/s kg . m/s2 kg/m . s
1.What is the unit for force ?
kg .
m kg . m/s
kg
. m/s2 kg/m .
s
2.What net force will
accelerate a 2.0 kg mass at 6.0 m/s2 ?
0.33
N 3.0 N 8.0 N
12
N
3.What is the net force acting on
a 3000 kg truck traveling at a constant velocity of 10. m/s ?
0 N
300 N 3000 N
30,000 N
4.The weight of an apple is
closest to
10-2
N 100 N 102 N
104 N
5.Two forces act on 2.0 kg
block on a frictionless, horizontal surface. One force is 2.0 N to the left, and the other
is
8.0 N to the right. The acceleration of the block is
5.0
m/s2 to the right 5.0 m/s2 to the left
3.0
m/s2 to the right 3.0 m/s2 to the left
6.As a constant unbalanced
force acts on an object in the direction of motion, the objects speed
decreases
increases
remains the same
7.If the net force applied in
the direction of motion to a certain object on a frictionless surface is doubled, the
acceleration
of the object is
halved
doubled
unchanged quadrupled
8.A 5.0 N block with a surface
area A is dragged across a horizontal wooden table an experiences a friction force of
2.0 N. What is the friction force acting on the 5.0 N block when the
surface area is increased to 2A ?
1.0
N 2.0 N 4.0 N
10. N
9.A block with a mass of 2.00
kg rests on a horizontal table. The vertical component of the block's weight is
0.0
N 2.00 N 9.80 N
19.6
N
10.A box rests on a plank that
is inclined to the horizontal. As the angle between the plank and the horizontal
increases,
the component of the weight of the box parallel to the plank
decreases
increases
remains the same
11.An unbalanced force of 10.0
N causes an object to accelerate at 2.0 m/s2. What is the mass of the object ?
0.2
kg 5.0 kg 8.0 kg
20 kg
12.An unbalanced force of 10 N
acts on a 20 kg mass for 5 seconds. The acceleration of the mass is
0.5
m/s2 2 m/s2 40 m/s2
200 m/s2
13.What is the weight of a 5.00
kg mass at the Earth's surface ?
5.00
N 14.7 N 49.0 N
147 N
14.Two 10.0 N forces act
concurrently on a point at an angle of 180o to each other. The magnitude of the
resultant of the
two forces is
0.00 N
10.0 N 18.0 N
20.0 N
15.An 800 N person is standing
in an elevator. If the upward force of the elevator on the person is 600 N, the person is
at
rest accelerating upward accelerating downward
moving downward at a constant speed
16.Two objects of equal mass
are a fixed distance apart. If the mass of each object could be tripled, the gravitational
force between the objects would
decrease
by 1/3 decrease by 1/9 triple
increase
9 times
17.Two frictionless blocks,
having masses of 8.0 kg and 2.0 kg, rest on a horizontal surface. If a force applied to
the
8.0 kg block gives it an acceleration of 5.0 m/s2, then the
same force will give the 2.0 kg block an acceleration of
1.2
m/s2 2.5 m/s2 10. m/s2
20.
m/s2
18.Which two quantities are
measured in the same units ?
velocity
and acceleration
weight
and force
mass
and weight
force
and mass
19.Which statement about an
object in equilibrium is true ?
The
object must be at rest.
The
object must be slowing down.
The
object may be speeding up.
The
object may be in motion.
20.A table exerts a 2.0 N force
on a book lying on the table. The force exerted by the book on the table is
20.
N 2.0 N 0.20 N
0 N
21.Two forces act on an object
concurrently. The resultant will be greatest when the angle between the forces is
0
degrees 60 degrees 90 degrees
180 degrees
22.If an object is traveling
east with a decreasing speed, the direction of the net force acting on the object is
north
south east west
23.Two point masses that are
equal are separated by a distance of 1 meter. If one mass is doubled, the gravitational
force
between the two masses would be
1/2
as great 2 times greater 1/4 as great
4 times greater
24.A 50 kg student, standing on
the Earth, attracts the Earth with a force closest to
0 N
5 N 50 N
500
N
25.If the mass of a moving
object could be doubled, the inertia of the object would be
halved
doubled
unchanged quadrupled
26.As the vector sum of all the
forces acting on an object increases, the acceleration of the object
decreases
increases
remains the same
27.A baseball bat moving at a
high velocity strikes a feather. If air resistance is neglected, compared to the force
exerted
by the bat on the feather, the force exerted by
the feather on the bat will be
smaller
larger the same
28.A force of 100. N is applied
to an object at an angle of 30o from the horizontal. What is the magnitude of
the vertical
component of this force ?
0 N
50.0
N 86.7 N 100. N
29.A cart is uniformly
accelerated from rest. The net force acting on the cart is
decreasing
zero constant
increasing
30.On the planet Gamma, a 4.0
kg mass experiences a gravitational force of 24 N. What is the acceleration due to gravity
on planet Gamma ?
0.17
m/s2 6.0 m/s2 9.8 m/s2
96 m/s2
31.If the mass of one of two
particles is doubled and the distance between them is doubled, the force of gravitational
attraction between the two particles will
decrease
increase
remain the same
32.A force of 6.0 N north and a
force of 8.0 N east act concurrently on an object. The magnitude of the resultant of the
two forces is
1.3
N 2.0 N 10. N 14 N
33.A 20. N block slides over a
horizontal table. If it takes a force of 5.0 N to move the block at constant velocity,
what is the coefficient of kinetic friction ?
0.10
0.25
0.50 4.0
34.Two concurrent forces have a
maximum resultant of 45 N and a minimum resultant of 5.0 N. What is the magnitude of each
of these forces ?
0.0
N and 45 N 5.0 N and 9.0 N 20. N and 25 N
0.0 N and
50. N
35.Two masses of 10. kg and 1.0
kg are located 1.0 m apart. What gravitational force does each mass exert on the other ?
10.
N 0.10 N 6.7 x 10-10 N
6.7 x 10-11
N
36.A 5.0 kg block slides on a rough horizontal surface and experiences a constant friction force of 10. N. What is the coefficient of kinetic friction ?
0.20
0.40
0.60
0.80
37.A 3.0 kg mass is traveling in a circle of 0.2 m radius with a speed of 2.0 m/s. What is the centripetal force acting on the mass ?
10 N
20 N
60 N
80 N