Ivan finished 4/5 of his math homework problems and all 3 questions for his science homework before dinner. If he finished a tot
2 answers:
You might be interested in
Answer:
d = 0.38 m
Explanation:
As we know that the person due to the airbag action, comes to a complete stop, in 36 msec or less, and during this time, is decelerated at a constant rate of 60 g, we can find the initial velocity (when airbag starts to work), as follows:
vf = v₀ -a*t
If vf = 0, we can solve for v₀:
v₀ = a*t = 60*9.8 m/s²*36*10⁻³s = 21.2 m/s
With the values of v₀, a and t, we can find Δx, applying any kinematic equation that relates all of some of these parameters with the displacement.
Just for simplicity, we can use the following equation:
where vf=0, v₀ =21.2 m/s and a= -588 m/s².
Solving for d:
⇒ d = 0.38 m
Answer:
870 N
Explanation:
The expression for velocity of wave in a string is given below
v = , T is tension and m is mass per unit length .
m = 45 x 10⁻³ / 30 x 10⁻²
= .15 kg/m
Putting the given values in the equation
76 =
T = 76² x .15
= 866.4
870 N approx.