Transcript Test REVIEW - Greenwich Public Schools

Force
Test REVIEW
In the absence of an external force,
a moving object will
A.
B.
C.
D.
Slow down to a stop
Go faster and faster
Stop immediately
Move with constant speed
In the absence of an external force,
a moving object will
A.
B.
C.
D.
Slow down to a stop
Go faster and faster
Stop immediately
Move with constant speed
An object is thrown straight up. At
the top of its path the net force
acting on it is
A. Instantaneously equal to zero
B. Greater than zero but less
than its weight
C. Equal to its weight
D. Greater than its weight
An object is thrown straight up. At
the top of its path the net force
acting on it is
A. Instantaneously equal to zero
B. Greater than zero but less
than its weight
C. Equal to its weight
D. Greater than its weight
A camera has a mass of 40 kg on the moon.
gmoon = –1.6 m/s2. The weight of the
camera on earth is about
A.
B.
C.
D.
E.
7N
40 N
65 N
240 N
400 N
A camera has a mass of 40 kg on the moon.
gmoon = –1.6 m/s2. The weight of the
camera on earth is about
A.
B.
C.
D.
E.
7N
40 N
65 N
240 N
400 N
A 15-kg wagon is pulled to the right with a
force of 45 N. The wagon accelerates to the
right at 2 m/s2. How large is the friction force?
A.
B.
C.
D.
E.
3N
15 N
30 N
45 N
60 N
A 15-kg wagon is pulled to the right with a
force of 45 N. The wagon accelerates to the
right at 2 m/s2. How large is the friction force?
A.
B.
C.
D.
E.
3N
15 N
30 N
45 N
60 N
The coefficient of static friction for steel
on ice is 0.1. The force needed to set a
70-kg skater in motion is about
A. 0.1 N
B. 0.7 N
C. 7 N
D. 69 N
E. 686 N
The coefficient of static friction for steel
on ice is 0.1. The force needed to set a
70-kg skater in motion is about
A. 0.1 N
B. 0.7 N
C. 7 N
D. 69 N
E. 686 N
A force just slightly over 40 N is needed to set
a 10-kg steel box moving across a wooden
floor. The coefficient of static friction is
A.
B.
C.
D.
0.08
0.25
0.4
2.5
A force just slightly over 40 N is needed to set
a 10-kg steel box moving across a wooden
floor. The coefficient of static friction is
A.
B.
C.
D.
0.08
0.25
0.4
2.5
The inertia of a body tends to
cause the body to
A.
B.
C.
D.
E.
Speed up
Slow down
Resist any change in its motion
Fall toward the earth
Decelerate due to friction
The inertia of a body tends to
cause the body to
A.
B.
C.
D.
E.
Speed up
Slow down
Resist any change in its motion
Fall toward the earth
Decelerate due to friction
A car moving along a level road at
constant velocity has
A. Only weight acting on it
B. Only weight and the force of the
engine acting on it
C. A net force acting on it
D. No net force acting on it
E. No force of any kind acting on it
A car moving along a level road at
constant velocity has
A. Only weight acting on it
B. Only weight and the force of the
engine acting on it
C. A net force acting on it
D. No net force acting on it
E. No force of any kind acting on it
A car is towing a trailer and is
accelerating on a level road. The force
that the car exerts on the trailer is
A.
Equal to the force the trailer exerts on
the car
B. Greater than the force the trailer exerts
on the car
C. Equal to the force the trailer exerts on
the road
D. Equal to the force the road exerts on
the trailer
A car is towing a trailer and is
accelerating on a level road. The force
that the car exerts on the trailer is
A.
Equal to the force the trailer exerts on
the car
B. Greater than the force the trailer exerts
on the car
C. Equal to the force the trailer exerts on
the road
D. Equal to the force the road exerts on
the trailer
The frictional force between two
surfaces in contact does not
depend on
A.
The normal force pressing one against
the other
B. The areas of the surfaces
C. Whether the surfaces are stationary or
in relative motion
D. The types of materials in contact
The frictional force between two
surfaces in contact does not
depend on
A.
The normal force pressing one against
the other
B. The areas of the surfaces
C. Whether the surfaces are stationary or
in relative motion
D. The types of materials in contact
When a net force of 1.0 N acts on a
1.0 N object that is able to move
freely, the object receives
A.
B.
C.
D.
A speed of 1.0 m/s
An acceleration of 0.102 m/s2
An acceleration of 1.0 m/s2
An acceleration of 9.8 m/s2
When a net force of 1.0 N acts on a
1.0 N object that is able to move
freely, the object receives
A.
B.
C.
D.
A speed of 1.0 m/s
An acceleration of 0.102 m/s2
An acceleration of 1.0 m/s2
An acceleration of 9.8 m/s2
A block is pulled at constant speed by a FORCE
which acts at an angle. The normal force
exerted on the block by the surface is equal to
A.
B.
C.
D.
E.
FW
FW – Fy
FW + Fy
FW – F
FW + F
F
A block is pulled at constant speed by a FORCE
which acts at an angle. The normal force
exerted on the block by the surface is equal to
A.
B.
C.
D.
E.
FW
FW – Fy
FW + Fy
FW – F
FW + F
F
A block is pushed at constant speed by a FORCE
which acts at an angle. The normal force exerted
on the block by the surface is equal to
A.
B.
C.
D.
E.
FW
FW – Fy
FW + Fy
FW – F
FW + F
F
A block is pushed at constant speed by a FORCE
which acts at an angle. The normal force exerted
on the block by the surface is equal to
A.
B.
C.
D.
E.
FW
FW – Fy
FW + Fy
FW – F
FW + F
F
A force of 1 N is equivalent to
A.
B.
C.
D.
1 kg
1 kg.m/s
.
2
1 kg m/s
.
2
2
1 kg m /s
A force of 1 N is equivalent to
A.
B.
C.
D.
1 kg
1 kg.m/s
.
2
1 kg m/s
.
2
2
1 kg m /s
On Earth, Jodi’s mass is 60 kg. If Jodi
visited a planet where the
acceleration due to gravity is 5.0 m/s2
A.
B.
C.
D.
Her mass and weight would both be
smaller
Her mass and weight would both be larger
Her mass would stay the same and her
weight would be larger
Her mass would stay the same and her
weight would be smaller
On Earth, Jodi’s mass is 60 kg. If Jodi
visited a planet where the
acceleration due to gravity is 5.0 m/s2
A.
B.
C.
D.
Her mass and weight would both be
smaller
Her mass and weight would both be larger
Her mass would stay the same and her
weight would be larger
Her mass would stay the same and her
weight would be smaller
Find the acceleration of the 5-kg crate
as it slides down the incline (the kinetic
coefficient of friction = 0.25)
A.
B.
C.
D.
2
m/s
0.28
2.45 m/s2
2
2.78 m/s
2
4.9 m/s
300
Find the acceleration of the 5-kg crate
as it slides down the incline (the kinetic
coefficient of friction = 0.25)
A.
B.
C.
D.
2
m/s
0.28
2.45 m/s2
2
2.78 m/s
2
4.9 m/s
300
Find the tension in the rope below:
A.
B.
C.
D.
16 N
18 N
96 N
98 N
2 kg
m = 0.1
10 kg
Find the tension in the rope below:
A.
B.
C.
D.
16 N
18 N
96 N
98 N
2 kg
m = 0.1
10 kg