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Duplicate of Honors Physics - Forces Conceptual Review Flashcards | StudBud
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Duplicate of Honors Physics - Forces Conceptual Review
Duplicate of Honors Physics - Forces Conceptual Review
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A quiz of Applying Newton's Laws and uniform circular motion. #physics #newtonslaws #forces
Flashcards
35 cards
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Practice quiz
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Questions
35
Answers
1
You stand on a scale on an elevator, read 250 N. If the elevators accelerates downward...
The scale reading increases.
The scale reading decreases.
You become massless as the scale reads 0.
The scale reading stays the same.
2
A book is lying at rest on a table. The book will remain there at rest because:
There is no net force on the book.
There are no forces acting on it at all.
There is a net force but the book has too much inertia
It does move, but too slowly to be seen.
3
An elevator accelerates as it ascends. What must be true?
Ftension > Fgravity
Ftension < Fgravity
Fnet = Fgravity
Fnet = Ftension
4
A ball is dropped from rest and feels air resistance. Which graph shows its velocity?
d
a
c
e
5
Using the graph below, what is the approximate value of kinetic friction?
4 N
3.5 N
6 N
2.5 N
6
A man pushes a sled across a frictionless surface. What must be true?
The sled moves with uniform speed to the left.
The sled is accelerating to the left.
The sled is moving with uniform speed to the right.
Since there is no friction, the sled does not move.
7
Using the graph below, what is the approximate max. value of static friction?
2 N
3 N
4.5 N
5.5 N
8
What can you say about the force of gravity F
g
acting on a stone and a feather?
Fg is zero on both due to the vacuum
Fg is equal on both always
Fg is greater on the feather
Fg is greater on the stone
9
What is an object's natural tendency to resist change in motion called?
mass
friction
gravity
inertia
10
If the object's mass were doubled but
the net force remained constant
, its
acceleration
would
halve
double
stay the same
quadruple
11
When an object reaches terminal velocity, what must be true?
Fg > Fd
Fg = Fd
(Fg is weight, Fd is drag force) don't pick this answer!!!!
Fg < Fd
12
For every action there is an equal and opposite reaction.
Newton's 2nd Law
Newton's 3rd Law
Newton's 4th Law
Newton's 1st Law
13
What is true about a puck that slides without friction across the ice during a hockey game?
The puck will come to a stop.
The puck moves at constant speed.
The puck has constant negative acceleration.
A constant horizontal force acts on the puck.
14
Which of the following situations is
NOT
a result of the net force equalling zero?
Terminal velocity.
An object is accelerating to the right.
An object is moving at a constant velocity to the right.
An object is at rest.
15
When a boy pulls a cart, the force that causes him to move forward is
the force he exerts on the cart
the force the cart exerts on him
the force the ground exerts on his feet
the force he exerts on the ground with is feet
16
1 kg m/s
2 =
10 N
1 N
1 N m
1 N s
17
An object in a state of uniform motion stays in that state unless a net force is applied to it
Newton's 3rd Law
Newton's 1st Law
Newton's 4th Law
Newton's 2nd Law
18
A small car collides with a large truck. Which experiences the greater impact force?
Depends on the velocity of each
The car
The truck
Both the same
19
What can you say about the acceleration of gravity acting on the stone and the feather?
It's greater on the feather
It's equal on both always
It's zero on both due to the vacuum
It's greater on the stone
20
All of the following are examples of
contact
forces EXCEPT:
air resistance
gravity
push
friction
21
What would have to be done in order to have the cart continue with constant acceleration?
Push the cart continuously
Push the cart longer before release
Push the cart harder before release
Change the mass of the cart
22
If the net force on an object were doubled, its
acceleration
would...
halve
double
stay the same
quadruple
23
Which of the following is
NOT
example of net force equalling zero?
A car sits at a red light.
A book sits motionless on a table.
A book falls off of the table and falls to the ground.
A car drives on the road at a constant speed.
24
A ball is dropped from rest and feels air resistance. Which graph shows its acceleration?
d
e
a
b
25
When you kick a stone onto a frozen pond, it slides, slows down, then stops. You know that:
A net force acted on it all along
The stone has a natural tendency to be at rest
No net force acted on the stone
The kick force pushing the stone finally stopped pushing it
26
An astronaut inside an orbiting satellite feels weightless because...
there is no gravitational pull from the earth so far away
the satellite falls away from them at the same rate
the sun's gravity balances the earth's gravity
he or she is wearing a space suit
27
The relationship between an object's mass, its acceleration, and the applied force F is F=ma
Newton's 4th Law
Newton's 3rd Law
Newton's 2nd Law
Newton's 1st Law
28
You stand on a scale on an elevator, read 250 N. If the elevators descends uniformly...
It decreases momentarily then stabilizes
The scale reading decreases.
The scale reading stays the same.
The scale reading increases.
29
A hockey puck slides on ice at constant velocity. What is the net force acting on the puck?
Depends on the speed
Equal to its weight
More than its weight
Zero
30
An elevator decelerates as it ascends. What must be true?
Fnet = Fgravity
Ftension > Fgravity
Fnet = Ftension
Ftension < Fgravity
31
Can an object not be accelerating when only one force acts on it?
Yes
No
32
A large truck sits on frictionless ice. A fly smashes into the front window. What happens?
Truck moves backward at constant speed
The truck is too heavy, it just sits there
Truck accelerates backward
It moves forward at constant speed
33
Why is it harder to start sliding a box across the floor than to keep it sliding?
static friction = 0
kinetic friction < static friction
kinetic friction > static friction
kinetic friction = static friction
34
Compared with earth, an astronaut on Venus, where the acceleration of gravity is 8.8 m/s
2
, has
the same mass and less weight
less mass and less weight
less mass and the same weight
less mass and more weight
35
A cart is on a frictionless table. Once the cart is given a push, what will happen? It will:
Immediately come to a stop
Continue with constant velocity
Slowly come to a stop
Continue with constant acceleration
