Answer:
what is flowing in physical?
Explanation:
The velocity of the girl is -4.8 m/s.
Using the principle of conservation of linear momentum, The total momentum of bodies before and after collision is constant. Since the two objects are stationary, the initial momentum of each body is zero.
Thus;
0 = (80 × 3) + (50 × v)
0 = 240 + 50 v
-240 = 50 v
v = -240/50
v = -4.8 m/s
Note that the negative sign shows that the velocity of the girl is in opposite direction that that of the girl.
Learn more about momentum: brainly.com/question/904448
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Force = mass * acceleration
F = ma
F = (42kg) (7m/s2)
F = 294 N
Answer M
Answer:
The answer to the question is
The period of the blinker of the other car = 0.809 s
Explanation:
To solve this we list out the variables thus
Period of the student turn signal = 0.85 s, Period of the other car signal = T
In 17 seconds the two cars signal are in sync again
Therefore the frequency of the students car signal = 1/0.85 = 1.176 Hz and the frequency of the other car signal is 1/T however is 17 seconds the other car is ahead by one cycle thus
Therefore
17/T - 17/0.85 = 1
Which gives 17/T = 1 + 17/0.85 = 17.85/0.85 =
Multiplying both sides by T we have
17 = T×17.85/0.85
Therefore T = 17×0.85/17.85 = 0.809 s
The period of the blinker of the other car is 0.809 s