Chapter 1
What is the formal name for the set of standards that defines the units of measurement used principally in science?
Systeme International d’Unites
What is the area under a velocity-time graph?
Displacement
Two vectors are considered equal if they have the same…
Magnitude and direction
In all projectile motion problems the _____________ is always the same in both the horizontal and vertical directions.
time interval
Two people push on a piano. One pushes to the left with 50.0 N and the other pushes to the right with 60.0 N. Assuming that there are no other forces in the horizontal direction, what can we conclude about the net force on and acceleration of the piano?
The net force is 10.0 N to the right and the acceleration is to the right.
When an object is moving in a circle at constant speed, its acceleration is
constant in magnitude
The accepted value for a measurement is 7.000 units and your measurement is 1.55863 units. How would you characterize your measurement?
precise, but not accurate
What is always true about the distance an object traveled and the magnitude of its displacement?
The magnitude of the displacement is always less than or equal to the distance.
How do you add two vectors together?
Position tail of 2nd on head of first
A special case of projectile motion in which the initial vertical velocity is zero is called a(n) _____________ projections.
Horizontal
What is the mass of a 5151 N car?
525.1 kg
What force provides the centripetal force for a comet orbiting the sun?
gravity
unit for Thermodynamic temperature
Kelvins
change in position
displacement
Which trigonometric ratio is equal to opposite divided by hypotenuse?
sine
has the same direction as change in v
acceleration vector
What force causes the acceleration of an object down a frictionless inclined plane?
the component of gravity along the plane
A figure skater spins on the tip of his skate describes what type of motion.
rotational motion
unit for electric current
ampere
rate of change in position
velocity
The portion of a vector along one of the axes.
Component vector
location of an object relative to the origin of the frame of reference
position vector
the force resisting movement between two objects trying to slide past each other
static friction
A short-track speed skater moves slow as he moves around a 15 m radius turn is circular or rotational motion?
circular
unit for luminous intensitiy
candela
range of change in velocity
acceleration
The commutative property of vectors allows us to
Add vectors in any order.
displacement
difference vector
the pull force exerted by a string or cable
tension
The state of a system in which all torques are balanced
rotational equilibrium
unit for mass
kilogram
magnitude of velocity
speed
What is the sum of two or more vectors called?
resultant
a vector with no magnitude
zero vector
the force that opposes the motion of two objects sliding past each other
kinetic friction
This is a condition that can cause a system to rotate about its axis.
torque
unit for length
meter
A car accelerates from rest at a constant rate of 2.5 m/s^2 . How fast is it going after 12.0 s?
30 m/s
To solve the vector subtraction M - N, is the same as doing what vector operation?
M + (-N)
the vector magnitude equal to an object’s speed
velocity vector
A stationary box sits on an inclined plane. As the angle of inclination increases, how does the magnitude of the normal force on the box change?
it decreases
Newton’s Law of Universal Gravitation is called a(n)
inverse square law