Easy Guide: Converting km/h to m/s in Physics Class

  • Thread starter Thread starter kfink85
  • Start date Start date
AI Thread Summary
To convert kilometers per hour (km/h) to meters per second (m/s), divide the speed in km/h by 3.6. For example, to convert 82.4 km/h to m/s, you would calculate 82.4 / 3.6, resulting in approximately 22.9 m/s. This conversion is based on the fact that there are 1000 meters in a kilometer and 3600 seconds in an hour. Understanding this relationship simplifies the conversion process significantly. Mastering this conversion is essential for physics calculations involving speed.
kfink85
Messages
12
Reaction score
0
I am in my first physics class and the professor just kinda skimmed over this but I am lost on how to convert km/h to m/s.

What's the explanation on how to convert 82.4 km/h to m/s?

Thanks in advance for any help.
 
Physics news on Phys.org
There are 1000 m in one kilometer.
There are 60 seconds in an hour.

If you want to change from km/h to m/s, you need to divide by 1000 and multiply by 60. Think of it as multiplying by 1: 1 km/h * (1000m/km) * (1h/60s)= (1000/60) m/s
 
Thanks very much.
 
What I usually do is
\frac{1\ km}{1\ h}=\frac{1000\ m}{3600\ s}
which gives
1\ km/h=\frac{1}{3.6}\ m/s
or
1\ m/s=3.6\ km/h
 
Thread 'Variable mass system : water sprayed into a moving container'
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Back
Top