Avehicle has a mass of 1965 kg. it is travelling at a speed of 28.0 m/s. determine the kinetic energy of the vehicle.
write your answer using 3 significant digits. this would require the use of scientific notation.
(note: here is how i tried to solve:
ek = 1/2 mv^2
mass = 1965 kg
speed = 28.0 m/s
= 1/2 x 1965 kg x (28.0 m/s)
= 27, 510
= 2.75 x 10^4 )

1400 kg car has a speed of 27 m/s. if it takes 7 s to stop the car, what is the impulse and the average force acting on the car?

In science and physics what is the standard unit of measure for speed?

The air in an automobile tire with a volume of 2.60 ft3 is at 70°f and 21 psig. determine the amount of air that must be added to raise the pressure to the recommended value of 30 psig. assume the atmospheric pressure to be 14.6 psia and the temperature and the volume to remain constant. the gas constant of air is ru = 53.34ft⋅lbflbm⋅r(1 psia144 lbf/ft2) = 0.3704 psia⋅ft3lbm⋅r the amount of air that must be added to raise the pressure is lbm