[填空题]
A force of 10.0 ± 0.2 N is applied to a mass:sv. .rulmlt5 of 2.0 ± 0.01 kg, causinnpmeoc+gagcl :0/y8, g it to accelerate. What is the percentage uncertainty of its acceleration?/ym g8l, cno +g0ap:ce % (do not include the percent sign in your result)
参考答案: 2.50
本题详细解析: The acceleration is calculated upl6 kv2a9n gaaqhr90r2y* :uising 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 $7 \%$.
