stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Newton's Laws Flashcards | StudBud
Explore
/
Newton's Laws
Newton's Laws
21 terms
·
StudBud Administration
·
230 plays
middle school science, physics, Newtons Laws, review, 8th grade
Flashcards
21 cards
F
Practice quiz
P
Host live
L
Questions
21
Answers
1
If a car of mass 1kg moving at 4m/s runs into a 2kg car, moving at 3m/s, and they stick together, what's the new speed?
3.33 m/s
2.0 m/s
3.50 m/s
7.0 m/s
2
Which has more momentum, an 18 wheeler truck moving at 10mph, or a kid's bicycle moving at 15mph?
they dont have any momentum
the truck
they have identical momentums
the bike
3
What is the standard unit of force?
meter
Newton
kilogram
m/s2
4
What is the force on a free falling object with a mass of 25 kg?
0.392 N
245 N
2.55 N
250 N
5
Conservation of Momentum tells us that....
every action has an equal and opposite reaction
total momentum of objects stays constant even in a collision
not all momentum is lost during a collision, some remains
Even an outside force cannot change an object's momentum
6
What is the mass of a toy cart if a 15 N force accelerates it at a rate of 5m/s/s?
3000g
3kg
45kg
.3333kg
7
Which of Newton's Laws deal with action/reaction?
1st
4th
3rd
2nd
8
1 Newton is equal to _____________.
9.8 m/s2
1 lb
1 kg
1 kg x m/s2
9
How many days until Christmas?
47
42
51
34
10
When an object is moving at a constant velocity, the net force is _________.
zero
negative
positive
changing constantly
11
What is the mass of a person that weighs 490N?
4802 kg
50 N
4802 N
50 kg
12
If you apply a net force of 12N to a 4kg object, it will accelerate at a rate of:
48 m/s/s
.333 m/s/s
39.2 m/s/s
3 m/s/s
13
If you observe an object sliding across a room, moving toward the right, you can conclude
there can be no forces acting on the object while its in motion
there is likely a force acting on it, directed to the left
there is a force acting on it, pushing it to the right
there must be a force to the right AND a force to the left acting on it
14
If an action force is a cue ball (white) hitting a billiard ball, the reaction force is ______.
exerted by the billiard ball on cue ball
exerted on all other billiards
the billiard ball hitting a side wall
exerted on the table
15
Devices such as seatbelts and airbags are used to protect passengers from the effects of which law?
Newton's Third Law (action reaction pairs)
Newton's First Law/Law of Inertia
Law of Gravity
Conservation of Momentum
16
What force opposes motion of an object sliding across a surface?
Friction
Normal
Tension
Applied
17
The force of gravity on an object is also known as _________.
Mass
Weight
Inertia
Normal
18
The force of gravity balances _________ when an object is at terminal velocity
Contact force
Freefall
Air Resistance
Acceleration
19
Unbalanced forces cause _______.
velocity
acceleration
friction
momentum
20
When fully describing a force you must include its:
strength and direction
strength, direction, and unit
strength
direction
21
Momentum is
mass x velocity
both b (blue) and c ( yellow) are true
the tendency of an object to continue its state of motion
a "quantity of motion", or inertia in motion
