Answer:
a measure of both length and the direction of an object's path from its starting point straight to its ending point. ... Distance between reference points and other locations can be measured in ... It Has Experienced Motion. When an object changes position over time, speed describes how quickly an object changes position.
Explanation:
Answer:
a) the final velocity is 35.75 ft/s
b) The final elevation is 45 ft
Explanation:
Given the data in the question;
Weight of object; W = 100 lbf
Change in kinetic energy; ΔE = 500 ft-lb
so
m - m = ΔE
m - m = 500
multiply both sides by 2
m - m = 1000
m( - ) = 1000
- = 1000/m
- = (1000)(g) / W
we know that, acceleration due to gravity g = 9.8 m/s² = 32.18 ft/s²
so we substitute
- = (1000)(32.18) / 100
- = (1000)(32.18) / 100
- = 32180 / 100
- = 321.8
since The initial velocity is given to be 40 ft/s;
(40)² - = 321.8
1600 - = 321.8
= 1600 - 321.8
= 1278.2
= √1278.2
= 35.75 ft/s
Therefore, the final velocity is 35.75 ft/s
b)
we know that;
change in potential energy is;
ΔP.E = mg( h - h )
given that; increase in potential energy; ΔP.E = 1500 ft-lbf
and mg = Weight = 100 lbf
we substitute
1500 = 100( h - h )
h - h = 1500 / 100
h - h = 15 ft
given that, elevation of the object; h = 30 ft
h - 30 ft = 15 ft
h = 15 ft + 30 ft
h = 45 ft
Therefore, The final elevation is 45 ft
Answer:
The answer is A
Explanation:
Work done = mgh
where mass, m = 92kg, g= 9.81, height,h= 325m
Therefore,
W= mgh
W=92*9.81*325
W=293319
W=2.93*10>5
C- The temperature increase allows particles to use up more friction kinetic energy of which is observed from the collision theory. - As temperature increases particles move more and have more energy. Hope this helps :)