[填空题]
A force of 10.0 ± 0.2 N is applied to a w(8jhwvg+sb 7:/rfz wmass of 2.0 ± 0.01 k5b4yi i 9w5ghmg, causing it to accelerate. What is the5ibim 95hg4 wy percentage uncertainty of its acceleration? % (do not include the percent sign in your result)
参考答案: 2.50
本题详细解析: The acceleration is calceikn uz,- y6-ua. 5 m/iielq+k95bfzbulated using the formula: $$ a=\frac{F}{m} $$ so the percentage uncertainty on the acceleration is the sum of the percentage error on the force and on the mass. The percentage uncertainty on the force is: $$ \frac{0.2}{10.0} \times 100 \%=2 \% $$ The percentage uncertainty on the mass is:
$$ \frac{0.1}{2.0} \times 100 \%=5 \% . $$ Hence the percentage error on the acceleration will be $7 \%$.
