A car travels with an average speed of 22 m/s.what is this speed in km/s
2 answers:
Answer:
22 m/s = 79.2 km/h
Explanation:
Given that,
The average speed of the car is 22 m/s. Here, we need to convert the speed to km/h. Firstly, we will see the following conversions as :
1 kilometres = 1000 meters
1 hour = 3600 seconds
To convert m/s to km/h we must use these coversions.
After solving the above expression, we get
22 m/s = 79.2 km/h
So, the car travel with a speed of 79.2 km/h. Hence, this is the required solution.
You might be interested in
Answer:
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