What is the mass of a car that weighs 11,220 N? (The units are kg. Do not include units in the answer and you may round to 3 significant figures. )
so w=mg
11220=m9.80
11220/9.80=m
1144=m to three sig figures =1140 kg
right?
correct
1144.8979 is indeed 1140 to three sig figs
Yes, you are correct. To find the mass (m) of the car given the weight (w), you can use the equation w = mg, where g is the acceleration due to gravity. Rearranging the equation, we have m = w/g.
In this case, the weight of the car is 11,220 N. The acceleration due to gravity, g, is approximately 9.80 m/s².
Plugging in the values, we get m = (11,220 N) / (9.80 m/s²) = 1,144.08 kg. Rounding to three significant figures, the mass of the car is approximately 1,140 kg.