A. 1 dimensional coordinate system
Answer:
25.95 m
Explanation:
m = mass of the bungee jumper = 50 kg
k = spring constant of the cord = 100 N/m
x = stretch of the cord
L = length of the cord = 10 m
h = height dropped by the bungee jumper = L + x = 10 + x
Using conservation of energy
Spring potential energy = gravitational potential energy
(0.5) k x² = mg h
(0.5) (100) x² = (50) (9.8) (10 + x)
x = 15.95 m
d = distance traveled below the bridge
d = L + x
d = 10 + 15.95
d = 25.95 m
Answer:
C. 100
D.3
E. 33.3
Explanation:
C. Mechanical Advantage=Load / Effort
= 200N
--------
100N
Therefore,. = 100
D. I. Velocity Ratio= distance moved by the effort / distance moved by load
= 30cm/10cm
= 3
II. Efficiency= M.A / V.R
= 100/3
= 33.33
Answer:
The human ear is not sensitive to every frequency of sound, rather, our hearing range is from 20Hz to 20,000Hz. This means sound frequencies outside this range are not audible to the human ear, which is why not every sound produced is heard. This is quite a blessing because if we could hear every vibrating body, then our ears would never stop listening: we won't be able to distinguish 'important sounds' from unimportant ones, rendering our ears effectively useless. Perhaps this is why we have a hearing range in the first place: sounds of our friends and our foes lie in 20Hz-20kHz range.
Answer:
Kinetic - a box moving
Thermal - sand that feels warm
Electrical - lightning
Radiant - radio waves
Gravitational Potential - fruit hanging from a tree
