All about those units
What's that equation?
Conceptual Multiple Choice
Definitions
100
The standard units for velocity are these
m/s
100
A UPS driver lifts a box 2 meters with a force of 10 Newtons.
What is W=Force*distance
100
An echo is strong evidence that sound can be
a) amplified
b) diffracted
c) dispersed
d) reflected
What is d) reflected?
100
Energy due to motion.
What is Kinetic Energy
200
The units for momentum
N s or kg m/s
200
Determine the color of a ray of light with a wavelength of 6.21 x 10-7 m.
200
Compared to the inertia of a 1 kg mass, the inertia of a 4 kg mass is
a) 1/4 as great
b) 16 times as great
c) 1/16 as great
d) 4 times as great
What is d) 4 times as great
200
If you are pushing or pulling something, you are exerting this on it
What is Force
300
kg m/s2
N
300
A clam dropped by a sea gull takes 3.0 seconds to hit the ground. What is the sea gull's approximate height above the ground at the time the clam dropped?
300
The gravitational force between two objects is inversely proportional to
a) mass squared
b) distance squared
c) mass
d) distance
What is b) distance squared?
300
The motion of the wave is perpendicular to the motion on the medium on which the wave moves.
What is Transverse Waves
400
N m
J
400
A 3.2 x 10.6 C proton is 2.4 x 10-8 m away from a 1.6 x 10-6 C electron. What is the force of the electron onto the proton?
F_e = (kq_1q_2)/r^2
400
Which forces can be either attractive or repulsive?
a) gravitational and magnetic
b) electrostatic and gravitational
c) magnetic and electrostatic
d) gravitational, magnetic, and electrostatic
What is c) magnetic and electrostatic?
400
The same numerical value of speed. But also added a direction.
What is Velocity
500
C/s
A
500
Find the energy of a 720 kg cart that is momentarily at rest at the top of a 140 m hill.
PE_g= mgh
500
An unbalanced force of 2 newtons applied to a given mass produces an acceleration. If an unbalanced force of 1 newton is applied to the same mass, the acceleration produced will be
a) the same
b) one half as much
c) twice as much
d) four times as much
What is b) one half as much?
500
Mass in Motion
What is momentum?