Physics 011
Chapter 1: Introduction
Quiz#:1B
Mc

Kinetic
energy is given by the formula KE = 1/2 mv^{2}, where m
is the mass and v is the velocity. The derived SI unit of
energy is the joule, J, which is equivalent to which combination of basic
units? 


kg m^{2}/s^{2} 


g cm^{2}/s^{2} 


g m^{2}/s^{2} 


kg m/s^{2} 





If
1 inch is equal to 2.5 cm, approximately how many inches are in 1000
kilometers? 


2.5 x 10^{4}
in 


4 x 10^{4}
in 


2.5 x 10^{7}
in 


4 x 10^{7}
in 





A
marathon race is about 26 miles long. What is the length in kilometers? (1 km
= 0.623 mi.) 


0.024 km 


16 m 


42 km 


52 km 





If a man is 6 foot 4 inches
tall, what is his approximate height in centimeters? (1 in. = 2.54 cm) 


230 cm 


190 cm 


150 cm 


120 cm 





The
terminal velocity of a drop of water falling through the atmosphere is v =
(2/9) (r^{2} g p/n) where v is the velocity of the drop in
m/s; r is the radius of the drop in m; g is the
acceleration of gravity in m/s^{2} and p is the density of
water in kg/m^{3}. What must be the units of n, the
coefficient of viscosity of the air through which the drop falls? 


kg m/s 


m s/kg 


kg s^{2}/m 


kg/m s 
