Forces Review #1 Question Preview (ID: 45553)
Forces.
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A woman at the grocery store applies 25.3N to a shopping cart. If she accelerates the cart at a rate of 0.966m/s² when she pushes the cart, what is the mass of the cart?
a) 26.2kg
b) 25.3kg
c) 1830kg
d) 223kg
If the net force acting on an object is not equal to zero, then the object is definitely
a) at rest
b) moving at a constant velocity
c) losing mass
d) accelerating
Which of the following is the tendency of an object to maintain its state of motion?
a) acceleration
b) inertia
c) force
d) velocity
an object at rest stays at rest and one in motion stays in motion unless an unbalanced force act on it is
a) newtons first law
b) newtons 2nd law
c) newtons 3rd law
d) law of thermodynamics
F=ma, to have a force you need a mass that is accelerating
a) newtons first law
b) newtons second law
c) newtons 3rd law
d) law of thermodynamics
for every action there is an equal and opposite reaction
a) newtons first law
b) newtons second law
c) newtons third law
d) 1st law of thermodynamics
a coffee cup will sit on the table forever until someone moves it is an example of
a) newtons first law
b) newtons second law
c) newtons third law
d) 1st law of thermodynamics
the ball will roll forever until an outside force (like friction) stops it. this follows which law
a) newtons first law
b) newtons second law
c) newtons third law
d) 1st law of thermodynamics
if your sister hits you with a baseball bat, there will be more force behind it if it has a larger mass or if its accelerating. This is an example of
a) newtons first law
b) newtons second law
c) newtons third law
d) 1st law of thermodynamics
a book sits on a table. The downward weight force of the book opposes the upward force of the normal force. this is an example of
a) newtons first law
b) newtons second law
c) newtons third law
d) law of inertia
the force that opposes something sliding across a surface is known as
a) force of air resistance
b) weight force
c) normal force
d) friction force
The downward weight force is opposed by an upward support force called
a) normal force
b) friction force
c) air resistance
d) push force
What is the unit for force?
a) W
b) J
c) F
d) N
If two forces are equal in size but opposite in direction, they are said to be______________ and would result in an object________________
a) balanced, moving
b) balanced, not moving
c) unbalanced, moving
d) unbalanced, not moving
A woman weighs 705.6N What is her mass?
a) 72lbs
b) 6,914.9kg
c) 68kg
d) 72kg
A 3.4kg book is thrown at a wall at a rate of 2.3m/s^2. What is the force applied to the wall as the book hits it?
a) 1.5N
b) 7.8N
c) 0.68N
d) 33N
Which of the following is NOT an example of a contact force:
a) Gravitational force
b) A push force
c) A pulling force
d) An applied force
In a free body diagram, the force of gravity is drawn as
a) A vector directed upward
b) A vector directed to the right
c) A vector directed downward
d) A vector directed either up or down
Magnetism is an example of a(n)
a) push force
b) contact force
c) applied force
d) field force (action at a distance)
one girl pushes with 12N to the right on a box. A second girl pushes to the right with 4N of force. A 3rd pushes to the left with 5N of force. What is the net force and in which direction?
a) 11N to the left
b) 11N to the right
c) 16N to the right
d) 21N to the right
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