# PHYSICS 1 UNIT 1

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True
It is possible to multiply a vector by a scalar.
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True
A 2D vector can have a component equal to zero even when its magnitude is nonzero.
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True
The components of a vector can be different in different coordinate systems.
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False
A 2D vector can have a magnitude equal to zero even when one of its components it nonzero.
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False
The magnitude of a vector can be different in different coordinate systems.
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False
It is possible to add a scalar to a vector.
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False
The direction of a vector can be different in different coordinate systems.
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False
If V3=V1+V2, then V3=V1+V2.
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False
If V3=V1+V2, then V3V1.
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True
If V3=V1+V2, then V4=3V1+3V2 is parallel to V3.
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True
If V3=V1+V2, then V3−V2 is parallel to V1.
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Decreases
If the wall were slightly farther from where the projectile was launched (the projectile still hits it), how would that effect the following?The distance from the ground to where the projectile hit the wall.
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Stays the same
If the wall were slightly farther from where the projectile was launched (the projectile still hits it), how would that effect the following?The maximum height of the projectile.
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Stays the same
If the wall were slightly farther from where the projectile was launched (the projectile still hits it), how would that effect the following?The magnitude of the x component of the velocity of the projectile when it hits the wall.
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Increases
If the wall were slightly farther from where the projectile was launched (the projectile still hits it), how would that effect the following?The magnitude of the y component of the velocity of the projectile when it hits the wall.
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Increases
If the wall were slightly farther from where the projectile was launched (the projectile still hits it), how would that effect the following?The speed of the projectile when it hits the wall.
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False
If the average velocity of an object is zero, then the average speed of the object must also be zero.
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True
If the initial velocity of an object is zero, then the initial speed of the object must be zero.
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False
If the initial speed of an object is zero, then the initial position of the object must be the origin.
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False
If the velocity of an object is zero, then the acceleration of an object must also be zero.
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True
The acceleration of an object can be non-zero when the speed of the object is constant.
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False
The average speed of an object is always equal to the magnitude of the average velocity of the object.
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True
If the acceleration of an object is zero, then the average speed must be equal to the magnitude of the average velocity for the object.
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True
The speed of an object can never be negative.
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True
The velocity of an object can reverse direction when the acceleration of the object is constant.
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False
If an object moves in one dimension with a positive component of acceleration, its speed must be increasing.
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The average acceleration is zero
A car is initially traveling east through New York City at 10 mph. As the car approaches an intersection it stops and turns left to go north. After traveling one block north the car stops and turns right to once again head east. At the final time the car is traveling east at 10 mph. In what direction is the average acceleration of the car as a result of the motion described above?NorthEastNortheastThe average acceleration is zero
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mass or temperature
physical quantity not described as a vector?
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none makes sense
V3 = V1 + V2 What is true about V3?a) V3>0b) V3<0c) V3 = 0d) not enough informatione) none makes sense
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b) V3 < V1 + V2
What is true about V3 = V1 + V2 ?a) V3> V1 + V2b) V3 < V1 + V2c) V3 = V1 + V2d) not enough info
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a) V4x > 0 ; V4y > 0
Which is true? V4 = V1 + V2a) V4x > 0 ; V4y > 0b) V4x > 0 ; V4y < 0c) V4x < 0 ; V4y > 0d) V4x < 0 ; V4y < 0e) not enough info
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b) V5 = 7sqrt2
What is true about V5 = -V1 + V2a) V5 = 14b) V5 = 7sqrt2c) V5 = 10d) V5 = 5sqrt2e) V5 = -14
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DONT
Vertical components of the velocity (do, dont) depend on one another
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magnitude
Size of any vector is
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unit vector
A ____________ is a vector whose magnitude is 1 and is indicated with a hat.
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Average of Magnitude of Velocity
Which is equivalent to speed?Magnitude of Average VelocityAverage of Magnitude of Velocity
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dynamics
What gives rise to changes in motion, or in other words.. acceleration?
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pull
tension forces can only ______ objects
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contact forces
When two objects directly touch one another, then they can exert _____________ on each other.
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always
The direction of kinetic friction ___________ opposes the direction of slipping.
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Newton
Si unit of Force
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inertia
resistance to such a change in motion is called
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Kilogram (kg)
Si unit of mass
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net external force
The sum of all external forces is called the ___________.
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Newtons 1st Law
To an inertial observer, an object that has no net external force acting on it will appear to move w a constant velocity.
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Newtons 2nd Law
To an inertial observer, the acceleration of the center of mass of a system (b) is equal to the net force acting on it divided by the inertial mass of the system.
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Newtons 3rd Law
If an object a exerts a force on object b, then object b must exert a force of the same form on object a, which is equal in magnitude and opposite in direction.
1 of 47
question
True
It is possible to multiply a vector by a scalar.
question
True
A 2D vector can have a component equal to zero even when its magnitude is nonzero.
question
True
The components of a vector can be different in different coordinate systems.
question
False
A 2D vector can have a magnitude equal to zero even when one of its components it nonzero.
question
False
The magnitude of a vector can be different in different coordinate systems.
question
False
It is possible to add a scalar to a vector.
question
False
The direction of a vector can be different in different coordinate systems.
question
False
If V3=V1+V2, then V3=V1+V2.
question
False
If V3=V1+V2, then V3V1.
question
True
If V3=V1+V2, then V4=3V1+3V2 is parallel to V3.
question
True
If V3=V1+V2, then V3−V2 is parallel to V1.
question
Decreases
If the wall were slightly farther from where the projectile was launched (the projectile still hits it), how would that effect the following?The distance from the ground to where the projectile hit the wall.
question
Stays the same
If the wall were slightly farther from where the projectile was launched (the projectile still hits it), how would that effect the following?The maximum height of the projectile.
question
Stays the same
If the wall were slightly farther from where the projectile was launched (the projectile still hits it), how would that effect the following?The magnitude of the x component of the velocity of the projectile when it hits the wall.
question
Increases
If the wall were slightly farther from where the projectile was launched (the projectile still hits it), how would that effect the following?The magnitude of the y component of the velocity of the projectile when it hits the wall.
question
Increases
If the wall were slightly farther from where the projectile was launched (the projectile still hits it), how would that effect the following?The speed of the projectile when it hits the wall.
question
False
If the average velocity of an object is zero, then the average speed of the object must also be zero.
question
True
If the initial velocity of an object is zero, then the initial speed of the object must be zero.
question
False
If the initial speed of an object is zero, then the initial position of the object must be the origin.
question
False
If the velocity of an object is zero, then the acceleration of an object must also be zero.
question
True
The acceleration of an object can be non-zero when the speed of the object is constant.
question
False
The average speed of an object is always equal to the magnitude of the average velocity of the object.
question
True
If the acceleration of an object is zero, then the average speed must be equal to the magnitude of the average velocity for the object.
question
True
The speed of an object can never be negative.
question
True
The velocity of an object can reverse direction when the acceleration of the object is constant.
question
False
If an object moves in one dimension with a positive component of acceleration, its speed must be increasing.
question
The average acceleration is zero
A car is initially traveling east through New York City at 10 mph. As the car approaches an intersection it stops and turns left to go north. After traveling one block north the car stops and turns right to once again head east. At the final time the car is traveling east at 10 mph. In what direction is the average acceleration of the car as a result of the motion described above?NorthEastNortheastThe average acceleration is zero
question
mass or temperature
physical quantity not described as a vector?
question
none makes sense
V3 = V1 + V2 What is true about V3?a) V3>0b) V3<0c) V3 = 0d) not enough informatione) none makes sense
question
b) V3 < V1 + V2
What is true about V3 = V1 + V2 ?a) V3> V1 + V2b) V3 < V1 + V2c) V3 = V1 + V2d) not enough info
question
a) V4x > 0 ; V4y > 0
Which is true? V4 = V1 + V2a) V4x > 0 ; V4y > 0b) V4x > 0 ; V4y < 0c) V4x < 0 ; V4y > 0d) V4x < 0 ; V4y < 0e) not enough info
question
b) V5 = 7sqrt2
What is true about V5 = -V1 + V2a) V5 = 14b) V5 = 7sqrt2c) V5 = 10d) V5 = 5sqrt2e) V5 = -14
question
DONT
Vertical components of the velocity (do, dont) depend on one another
question
magnitude
Size of any vector is
question
unit vector
A ____________ is a vector whose magnitude is 1 and is indicated with a hat.
question
Average of Magnitude of Velocity
Which is equivalent to speed?Magnitude of Average VelocityAverage of Magnitude of Velocity
question
dynamics
What gives rise to changes in motion, or in other words.. acceleration?
question
pull
tension forces can only ______ objects
question
contact forces
When two objects directly touch one another, then they can exert _____________ on each other.
question
always
The direction of kinetic friction ___________ opposes the direction of slipping.
question
Newton
Si unit of Force
question
inertia
resistance to such a change in motion is called
question
Kilogram (kg)
Si unit of mass
question
net external force