Answer:
Explanation:
Given that,
The frequency of vibration is 120Hz
The mass of object attached is 0.5kg.
We want to find the tension In the string
The tension in the string is the weight of the object, it is how much gravity is pulling the object to the centre of the earth
Using newton second law.
F_net = m•a_y
The body is not accelerating the y-direction, then, a_y = 0
F_net = 0
Force acting on the string is the weight of the object and the tension in the string
T - W = 0
T = W
Where weight is mass × gravity
W = mg
Then,
T = W = mg
T = mg = 0.5 × 9.81
T = 4.905 N
The tension in the string is 4.905 N
Explanation:
observation is something what you could observe from your organs like eyes ears etc and also it is what you observed during an event for an experiment but inference is what you decide to do after observation or an event.
the act of inferring (to derive by reasoning). Observation = an act or instance of noticing or perceiving.
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Answer:
Part a)
a = - 8.45 m/s/s
Part b)
Part c)
Explanation:
Part a)
when car apply brakes then the friction force on the car in front of us is given as
here we need to find deceleration due to friction
Part b)
Braking distance of the car is the distance that it move till it stops
so we will have
Part c)
Since we know that average reaction time for human is 0.424 s
now we know that during reaction time our car will travel at uniform speed
so we will have
