Should always be used
Are more useful when analyzing horizontal forces than when analyzing vertical forces
Should include only the forces that are directly responsible for the acceleration
Should be used only when objects are accelerating
Only apply to objects in equilibrium
24 N [S], 14 N [E]
14 N [S], 24 N [E]
12 N [S], 12 N [E]
6 N [S], 10 N [E]
10 N [S], 6 N [E]
A
B
C
D
E
The object will accelerate north.
The object will be motionless.
The object will accelerate northeast.
The object will travel with uniform motion.
The object will travel north with a constant velocity.
1 N [W]
1 N [E]
2 N [N] and 1 N [W]
2 N [S] and 1 N [E]
2 N [S] and 1 N [W]
Moving at 5.3 m/s2
Moving at 3.1 m/s
Moving at 5.3 m/s
Moving at 3.1 m/s2
Not moving
14.0 N [W]
10.0 N [W]
8.0 N [W]
6.0 N [W]
4.0 N [W]
Arrow B will have twice the acceleration of arrow A.
Arrow A will have twice the acceleration of arrow B.
Arrow A and arrow B will have the same acceleration.
Arrow B will have four times the acceleration of arrow A.
Arrow A will have four times the acceleration of arrow B.
1.8 x 102 N [N]
1.8 x 102 N [S]
1.8 x 101 N [N]
1.8 x 10-1 N [N]
1.9 x 10-1 N [S]
Objects won't move unless pushed
Acceleration only occurs if there is net force
The acceleration of an object depends on its mass and the net force acting on it
Objects which are moving tend to stay moving
Forces always occur in pairs
When turning a corner, a passenger in a car is pushed against the door.
A skater stands on a frictionless pond, tosses her bag in one direction and she accelerates in the opposite direction.
The normal force on an object is always equal to the force of gravity acting on the same object.
The friction of a surface causes a sliding object to come to rest.
When firing a rifle, the force of the rifle on the bullet, is greater than the force of the bullet back on the rifle.
Force of gravity you exert on the Earth
Normal force of the Earth acting upward on you
Force your feet exert downward on the Earth
Force you exert on your feet, pressing them against the Earth
Force of gravity the Earth exerts on everything else
The force(s) acting forward is/are greater than the force(s) acting backward.
The sum of all forces is zero.
The sum of all forces has a value directed forward.
The forces acting on the object can be said to be “unbalanced.”
Newton’s second law best summarizes the effect of the forces acting on the object.
Kg·m/s2
G·cm/s
Kg·s2/m
Kg·m/s
Kg·cm/s2
The force that B exerts on A is greater than the force that A exerts on B.
The force that A exerts on B is greater than the force that B exerts on A.
The force that B exerts on A is equal to the force that A exerts on B regardless of the motion of the system.
The force that B exerts on A is equal to the force that A exerts on B provided that the system slides with uniform motion.
The sum of the applied force and the force that B exerts on A is equal to the force that A exerts on B.
|FT1| = |FT2| = |FT3|
|FT1| > |FT2| > |FT3|
|FT1| < |FT2| < |FT3|
|FT1| > |FT2| < |FT3|
|FT1| > |FT3| < |FT2|
Density
Weight
Force
Acceleration
Mass
Newton's first law
Newton's second law
Newton's third law
Both A and B
All of the above
35 N [down]
46 N [down]
69 N [down]
80 N [down]
92 N [down]
The object accelerates at 1.5 m/s2 [right]
The object accelerates at 11 m/s2 [right]
The object accelerates at 12 m/s2 [right]
The object accelerates at 13 m/s2 [right]
The object does not accelerate