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Nastasi K.

asked • 10/27/15

Physics Help?

(1) How long does it take a 19 kW steam engine to do 6.8 X 10^7 J of work?
a) 1 hr
b) 2 hr
c) 30 min
d) 300 s
 
(2) What is the resultant of a vector that has components 25 m/s east, and 25 m/s north?
 
(3) If you were on the moon and fired a projectile, the maximum range you could achieve would occur with an angle of (in degrees)?
 
(4) A ball rolls down a hill with constant acceleration of 2.0 m/s^2 from rest. After 4.0 s, its velocity in m/s is?

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