Acceleration = ( final velocity - intial velocity ) / time
= (60-0)m/s / 3s
= 20 m/s2
the answer is a
Answer:
a) 6.25 m/s
b) f = 832 N
Explanation:
given data:
mass of child = 36 kg
length 2.94 m
tension = 416 N
For part (A), we need to add the forces in normal direction F(n),
where T is tension
m is mass, g = 9.81 m/s^2, and
a is acceleration is given as.
where v is speed
r is the radius.
v = 6.25m/s
Part B)
F = 2*(416)
F = 832 N
Answer:
a) t = 3.01s
b) 15th floor
Explanation:
First we need to know the distance the elevator has descended before the bolt fell.
Now we can calculate the time that passed before both elevator and bolt had the same position:
Solving for t:
t1 = -1.87s t2 = 3.01s
In order to know how the amount of floors, we need the distance the bolt has fallen:
Since every floor is 3m:
Floors = Yb / 3 = 15 floors.
Answer:
An atmosphere is the layers of gases surrounding a planet or other celestial body. Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases