A chicken crosses a 7.50 m wide road at a constant speed of 0.367 m/s. How much time does it take to cross (in seconds)?
2 answers:
Answer:
Time taken by it is 20.43 seconds.
Explanation:
It is given that,
Distance covered by the chicken, d = 7.5 m
Speed of the chicken, v = 0.367 m/s
We need to find the time taken to cross. Time taken by an object is given by :
t = 20.43 s
So, the time taken by it to cross the road is 20.43 seconds. Hence, this is the required solution.
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Answer:
y = 77.74 10⁻⁵ m
Explanation:
For this exercise we can use Newton's second law
F = m a
a = F / m
a = 4.9 10⁻¹⁶ / 9.1 10⁻³¹
a = 0.538 10¹⁵ m / s
This is the vertical acceleration of the electron.
Now let's use kinematics to find the time it takes to move the
x= 29 mm = 29 10⁻³ m
On the x axis
v = x / t
t = x / v
t = 29 10⁻³ / 1.7 10⁷
t = 17 10⁻¹⁰ s
Now we can look for vertical distance at this time.
y = t + ½ a t²
y = 0 + ½ 0.538 10¹⁵ (17 10⁻¹⁰)²
y = 77.74 10⁻⁵ m