Intro to Physics Exam 1
Speed can sometimes be negative
False
A body at the end of a spring oscillates up and down ten times in five seconds. The period of oscillation is 2s.
False
A fast-moving body must have a larger acceleration than a slow-moving body.
False
A vector quantity has only a magnitude and no direction associated with it.
False
If an objects speed is constant, its velocity must also be constant
False
Motion in a circle at constant speed is motion with constant velocity
False
The number of cycles of a periodic process that occur per unit time is called the period
False
The period of oscillation for a signal having a frequency of 60Hz is 60 seconds
False
The time of one complete cycle of a periodic process to take place is called the period
False
Uniform motion is any motion at constant speed.
False
An object moving in a circle undergoes centripetal acceleration
True
Experimenting is part of the scientific method
True
If an objects velocity is constant, its speed must also be constant
True
Motion in a circle at constant speed is motion with constant acceleration
True
The metric prefix that means one thousand is milli-
True
The second is a metric unit of measure
True
The slope of a distance vs. time graph is the acceleration
True
Twenty milliseconds is 0.020s
True
In expression like /\v and /\t, /\ stands for
a. "change in"
A body at the end of a spring oscillates up and down ten times in five seconds. The period of oscillation is
a. 0.5s
The object's velocity is positive in region(s)
a. I
The figure shows a distance vs. time graph of an object. The acceleration of the moving object is
a. zero
Fifteen microseconds is
b. 0.000015g
The object's velocity is zero in region(s)
b. II
The acceleration of the moving object is (curved line)
b. constant
The figure shows a distance vs. time graph of an object. The velocity of the moving object is
b. constant
As the ball is going upwards
b. the velocity points up and the acceleration down
The object's speed is greatest in region(s)
c. III
The object's velocity is negative in region(s)
c. III
The slope of a velocity vs. time graph is the
c. acceleration
The velocity of the moving object is (curved line)
c. increasing
Which of the these are fundamental physical quantities?
c. length, time, and mass
An object moving in a circle undergoes
centripetal acceleration
Motion in a circle at constant speed is motion with
constant acceleration
The distance of the ball is below rooftop in meters is
d. 19.6
The velocity of the ball in m/s is
d. 19.6
A racecar goes around a 200m radius curve at a constant speed 40m/s. Its acceleration is
d. 8m/s^2
An aircraft approaches a runway that runs directly east as a strong wind blows out of the south. The direction that the aircraft should point in order to land on the runway
d. south of east
As the ball is going downwards
d. the velocity and acceleration both point down
What is the proper abbreviation for 'Kilohertz'
e. kHz
Free falling bodies experience
motion with constant acceleration
