its mass is 950 kg. find it's ke.

## A car is moving at 100 km/hr.

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# 3 Answers

KE = ½mv²,

where v is in m/s.

v= 100 km/h = 27.8 m/s

KE = ½(950kg)(27.8m/s)²=367,000 J

(I'm assuming 3 significant digits, though it could be just 2 or 1.)

Hey Sierra -- 950kg moving 100km/hr ... V is 100m/3.6s ... KE= 0.5mV*V ...

KE= 0.5(950)100(100)/(3.6*3.6) ~ 480E4/(36*0.36) ~ 40E4/(3*0.36) ~ 400kJ - 8% ...

KE ~ 400 - 32 ~

**370kJ**... Regards :)Hi Sierra;

Good to hear from you again.

I am assuming that ke is Kinetic Energy.

ke=(1/2)mv

^{2}ke=(1/2)(950 kg)(100 km/hour)

^{2}ke=(1/2)(950 kg)(10000 km

^{2}/hour^{2})ke=4750000 kg-km

^{2}/hour^{2}
## Comments

^{2}/hour^{2}^{2}/hour^{2}][(1 hour)^{2}/(360 sec)^{2}]^{2}/sec^{2}^{2}/sec^{2]}[(1000 m)^{2}/(1 km)^{2}]^{2}/sec^{2}Comment