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Your Phun Physics Teacher
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Forces Concepts Math Misc.
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Row 1, Col 1
30 N (up)
A book sits on a table and applies
a force of 30N to the table
(down). How much force is
applied by the table on the book?
1,2
True
True or False: Weight is
equal to the force due to
gravity acting on an
object.
1,3
.5kg x 9.8m/s² = 4.9N
A 0.5kg pear falls from a
tree. Calculate the force
acting on the falling pear.
(Ignore air resistance.)
1,4
True; Force has both magnitude
(amount) AND direction.
True or False: Force is
a vector quantity.
2,1
5N
A force of 15N and a force
of 20N are acting on an
object in opposite directions.
The net force is…
2,2
Acceleration is the same, 9.8 m/s².
Which has a greater
acceleration due to gravity, a
tennis ball or a steel ball of
the same size?
2,3
m=(90N)/(9.8m/s²)
=9.2kg
What’s the mass of a
bicycle that weighs 90N?
2,4
9.8 m/s²
A ball is thrown straight up.
At the top of its path, the
ball’s acceleration is…
3,1
True; if there was a net force
acting on the object, then that
object would have to be accelerating.
True or False: If an object is
moving with constant
velocity, then the object has
no net force acting on it.
3,2
Neither! Their masses are the same.
Which has the greater
mass, 20kg of feathers or
20kg of bricks?
3,3
Fnet=(5kg)(4m/s²)
=20N
An object with a mass of 5kg
accelerates at 4m/s². What is
the net force applied?
3,4
Which ball has a greater
force due to gravity, a tennis
ball or a steel ball of the
same size?
The steel ball.
Force due to gravity = (mass)(9.8 m/s2)More mass means more force due to gravity
4,1
(kg) x (m/s²)
What two units, when
multiplied together, equal a
Newton?
4,2
True.
Fbug = Fwindshield
mbug abug = mwindshield awindshield
True or False: A bug hits a car
windshield. The acceleration of
the bug is much greater than the
acceleration of the windshield.
4,3
a=(100N)/(40kg)
=2.5m/s²
A 40kg object
experiences 100N of net
force. What is the object’s
acceleration?
4,4
False:
Objects moving at a constant
velocity have a net force of zero.
True or False: Objects move
only when a net force is
exerted on them.
5,1
False:
The acceleration doubles.
True or False: If the force
acting on a cart doubles, the
cart’s acceleration
quadruples.
5,2
The acceleration is cut in half
(half as much acceleration).
A truck is moved by a force.
Suddenly, a concrete block is
dropped onto the truck so its
mass doubles. What happens to
the truck’s acceleration?
5,3
Fnet = 70N-10N = 60N
m=(60N)/(4m/s²)
=15kg
A box is being pulled with an
applied force of 70N and there’s a
friction force of 10N. If the
acceleration of the object is 4m/s²,
what is the mass of the box?
5,4
False:
Friction resists an
object’s motion.
True or False: Friction
causes an object to move.