Dipper effect of an oncoming train get louder as it approaches and sound diminishes as it goes away sound traveling
Answer:
C
Explanation:
Formula E=F/C also E=V/d
In this case use the second formula; E=V/d
Data given; E=4N/C d=8m
So v=E X d
V=4x8=32V
k.e=eV= 2X32=64eV
Answer:
h = 0.288m
Explanation:
Assume
= Speed of Sue
= Speed of Chris immediately after the push
Sue's KE =
now she swings this is converted into gravitation at PE of
mg n = 52 × 9.8 × 0.65
= 331.24
= 331.24
So,
They started at rest by conservation of momentum in case of push off the magnitude of sue momentum and it is equal to the magnitude of Chris momentum in the opposite or inverse direction
Chris kt =
= 220.827
220.827 = mgh
So, h = 0.288m