A plane was traveling at a constant speed of 250 m/s in a straight line for 50min. What is the plane’s acceleration ?
1 answer:
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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
Answer:
The speed of elephant must be 1.4 m/s.
Explanation:
Mass of the elephant, M = 2800 kg
Mass of sprinter, m = 77 kg
Speed of sprinter, v = 8.5 m/s
It is required to find the speed of elephant to have the same kinetic energy as that of sprinter. So,
So, the speed of elephant must be 1.4 m/s.