Answer:
50m; 0m/s.
Explanation:
Given the following data;
Initial velocity = 20m/s
Acceleration, a = - 4m/s²
Time, t = 5secs
To find the displacement, we would use the second equation of motion;
Substituting into the equation, we have;
S = 50m
Next, to find the final velocity, we would use the third equation of motion;
Where;
- V represents the final velocity measured in meter per seconds.
- U represents the initial velocity measured in meter per seconds.
- a represents acceleration measured in meters per seconds square.
<em>Substituting into the equation, we have;</em>
V = 0m/s
<em>Therefore, the displacement of the bus is 50m and its final velocity is 0m/s.</em>
Answer:
7270.7 Pa
Explanation:
g = Acceleration due to gravity = 9.8 m/s²
= Density of liquid = 1025 kg/m³
h = Height = 90 cm
= Pressure =
= Viscosity = 0.001 Pas
l = Length of needle = 2 cm
r = Radius of needle = 0.2 mm
P = Absolute pressure
Q = Flow rate =
From Poiseuille's equation we have
This pressure is the absolute pressure
The average gauge pressure inside the vein where the needle is is 7270.7 Pa (ignoring the negative sign)
Answer:
2kg
Explanation:
100N = Force 50m/s²= Acceleration
Mass=?
the equation is;
Mass(kg)= Force(N) ÷ Acceleration (m/s²)
100÷50=2
The gazelle has zero average acceleration because it's moving at a constant speed. Constant speed means no change in speed means zero acceleration.
The cheetah, on the other hand, changes its speed from 0 m/min to 1820 m/min in a matter of 3 seconds, so its average acceleration is
a[ave] = (1820 m/min - 0 m/min) / (3 s)
… = (1820 m/min) / (3/60 min)
… = 36,400 m/min²
… = (36,400 m) / (60 s)²
… = 91/9 m/s² ≈ 10.1 m/s²
Answer:
a) , b)
Explanation:
a) The distance between the center and one of the foci is:
The shortest distance is:
b) The longest distance is: