samsam Messages 9 Reaction score 0 Thread starter Jan 7, 2008 #1 Help i have brain ache, i need to know the kinetic energy at 120 mph ? please can someone help ?
Shooting Star Homework Helper Messages 1,980 Reaction score 4 Jan 7, 2008 #2 No, because you have not specified the mass. (Don't pass on the headache to us.)
samsam Messages 9 Reaction score 0 Jan 7, 2008 #3 Hi all i have to go on is a train doing Normal speed for the X2000 is 200 km/h (120 mph),
Shooting Star Homework Helper Messages 1,980 Reaction score 4 Jan 7, 2008 #4 For a mass m moving at speed v, KE = (1/2)mv^2 (in consistent units.)
samsam Messages 9 Reaction score 0 Jan 7, 2008 #5 Thankyou so much mate. I might be home and dry for your help.