Question

question 13 of 25
a piano has a mass of 99 kg. what is the weight of the piano?
a. 1030 n
b. 970 n
c. 842 n
d. 1129 n

Explanation:

Step1: Recall weight formula

Weight $W = mg$, where $m$ is mass and $g$ is acceleration due to gravity ($g = 9.8\ m/s^{2}$).

Step2: Substitute values

$m = 99\ kg$, $g=9.8\ m/s^{2}$, so $W=99\times9.8$.
$W = 970.2\ N\approx970\ N$

Answer:

B. 970 N