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Newton's Laws of Motion-Rev 10/28/18 Flashcards | StudBud
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Newton's Laws of Motion-Rev 10/28/18
Newton's Laws of Motion-Rev 10/28/18
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Newton's Laws review #physics 8th Grade ISAAC School
Flashcards
25 cards
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Questions
25
Answers
1
A vector has...
magnitude and direction (force, acceleration, velocity)
magnitude (speed, length)
magnitude and direction (speed, length, height)
direction (North, up, right)
2
You are watching a car race and observe a crash. What is the point of reference?
Car race
You
Cars
Race track
3
Describe what is happening to the object in the free form diagram
Object is falling with no air resistance
None of these
Object is not moving
Object is falling with air resistance
4
A car stops quickly from a velocity of 60 mph to 0 mph in 6 seconds. What is the acceleration?
360 m/s2
10 m/s2
360 m/s2
-10 m/s2
5
The law of action and reaction is:
Newton's 2nd Law
Newton's 3rd Law
Newton's 4th Law
Newton's 1st Law
6
A 10 Newton falling mass encounters 6 Newtons of air resistance. The net force on the mass is
4 Newtons up
4 Newtons down
16 Newtons down
16 Newtons up
7
You can change the amount of friction on an object by changing the...
time
force applied
Answer 1 and 2
surfaces
8
Which object experiences a greater force when a kid on a bike hits a moving car?
the forces are equal
the kid on the bike
the car
9
The acceleration produced by a net force on an object is:
In the same direction as net force
all of these
Directly proportional to the net force acting on the object
Inversely proportional to the object's mass
10
If a p=mv, what is the velocity of a 500kg car with a momentum (p) of 2000 kg m/s
4 m/s
4 kg
10000 kg
10000 m/s
11
If you go to the moon, your mass is
less
the same
more
zero
12
Which collision is an elastic collision?
A truck hitting a car
Two pool balls colliding
A bug hitting a windshield at 50 mph
Two cars colliding
13
A hammer applies a force to a nail. What is the reaction force in this scenario?
the force of nail on the hammer
the nail moving into the block
Friction from the wood on the nail
the wood resisting the nail
14
A 4 kg car accelerates at a rate of 6 m/s
2
. How much force is the car's engine producing?
24 N
1.5 N
10 N
256 N
15
Acceleration from gravity =~10 m/s
2
. What is the velocity of a dropped ball falling for 4 secs.
400 m/2
2.5 m/s
40 m/s
0.4 m/s
16
Describe what is happening in the following free form diagram.
Object is accelerating to the right
Object is accelerating to the left
Object is falling
The object is decelerating to the right
17
This is the force exerted by a surface on an object. It is perpendicular to the surface.
Tension
Friction
Gravity
Normal force
18
The Law of Inertia is:
Newton's 1st Law
Newton's 3rd Law
Newton's 4th Law
Newton's 2nd Law
19
The SI Unit of length is the...
meter
foot
pound
yard
20
Which has zero acceleration?
An object with constant velocity
all of these
An object with zero net force
An object at rest
21
F=ma is
Newton's 2nd Law
Newton's 3rd Law
Newton's 1st Law
Newton's 4th Law
22
A large truck and a small car \have a head-on collision. The force of impact is:
greater on the truck
impossible to determine
greater on the car
the same for both
23
What does the following free form diagram represent concerning acceleration?
An object at rest (no acceleration)
an object accelerating to the right
an object accelerating downward
an object accelerating to the left
24
An object has twice as much mass as another object. The 1st object also has twice as much:
inertia
energy
velocity
gravitational acceleration
25
Which friction type is hardest to overcome?
rolling
static
fluid
sliding
