Friday

March 6, 2015

March 6, 2015

Posted by **smh** on Thursday, February 16, 2012 at 5:39pm.

min

- physics -
**drwls**, Thursday, February 16, 2012 at 8:26pmi assume you mean the mass is

M = 1.5*10^7 kg

The acceleration is

a = F/M = 6.9*10^5/1.5*10^7 = 0.046 m/s^2

72 km/h = 20 m/s

Divide 20 m/s by the acceleration rate to get the time required.

T = (20 m/s)/(0.046 m/s^2) = _____ s

**Answer this Question**

**Related Questions**

Physics - A freight train has a mass of 1.2 107 kg. If the locomotive can exert ...

Physics - A freight train has a mass of 1.7 107 kg. If the locomotive can exert ...

physics - A freight train has a mass of 1.4 107 kg. If the locomotive can exert...

physics - A freight train has a mass of 6.5 107 kg. If the locomotive can exert ...

physics - A freight train has a mass of 5 x 107 kg. If the locomotive can exert ...

physics - A freight train has a mass of 1.2 107 kg. If the locomotive can exert ...

physics - A freight train has a mass of 1.9 107 kg. If the locomotive can exert ...

physics - A freight train has a mass of 3.1 × 107 kg. If the locomotive can ...

physics - A freight train has a mass of 1.5 × 107 kg. If the locomotive can ...

physics - A freight train has a mass of 3.2 × 107 kg. If the locomotive can ...