Physics Lab Final
A quantity that has only a magnitude with proper units is called a
scalar
When finding the magnitude of the sum of two vectors, you can directly add the magnitudes of the two vectors.
False
Which of these velocity vs. time graphs above represent an object that undergoes a direction change?
crosses x axis
A specific pendulum has a period of T, given by the equation above. IF the pendulum is moved from the earth where the g is 9/8 m/s2, to Jupiter where it is 26.0 m/s2, the period of the pendulum will
decrease
If an inelastic collision takes place, during the collision, what is conserved?
energy and momentum is conserved
Which of the following quantities are scalars.
speed, distance, mass
The frictional force that holds an object in place is called ______ friction.
static
Why can you not use conservation of linear momentum during the upward swing?
There are external forces acting plus the pendulum is moving at a curve
Which of these position vs. time graphs above represent an object that undergoes a direction change?
changes from positive to negative slope (or other way around)
The coefficient of static friction is always _______ the coefficient of kinetic friction.
greater than
A specific pendulum has a period of T, given by the equation above. If the length of the string, L, is increased, the period will
increase
If the force applied on an object is greater than the force of kinetic friction the object will travel with ________ velocity.
increasing
What principles can you use to find the speed of the block at the base of the incline.
kinematics and conservation of mechanical energy
The frictional force that slows an object down while in motion is called ______ friction.
kinetic
Which of these velocity vs. time graphs above represent an object moving with decreasing speed?
magnitude of slope decreases
Which of these position vs. time graphs above represent motion with increasing speed?
magnitude of slope increases
Why can you apply conservation of linear momentum during the brief period before and after the collision?
there are no external forces acting on the pendulum
The coefficient of friction can be zero, meaning there is no friction between the two surfaces.
false
Which of these velocity vs. time graphs above represent and object moving with increasing acceleration?
magnitude of slope increases
If a completely elastic collision takes place, during the collision, what is conserved?
mechanical energy, momentum, and energy is conserved
Which of these position vs. time graphs above represent an object moving only in the positive direction?
positive slope
Which of these velocity vs. time graphs represent an object moving only in the positive direction?
positive slope
A specific pendulum has a period of T, given by the equation above. IF the angle is increased from 2 degrees to 4 degrees, the period will
remain the same
A specific pendulum has a period of T, given by the equation above. IF the mass of the pendulum, m, is decreased, the period will
remain the same
What are the units for the period of a pendulum from the equation above?
seconds
A quantity that has both a magnitude with proper units as well as a directions is called a
vector
Which of the following quantities are vectors
weight, velocity, displacement
percent error
(ref value-experimental value)/(ref value) *100
percent difference
((First Value − Second Value)/ (avg of values) *100