7. a 1 - kg block of iron weighs about a) 1 n. b) 5 n. c) 10 n. d) more than 10 n.
7. a 1 - kg block of iron weighs about a) 1 n. b) 5 n. c) 10 n. d) more than 10 n.
Answer
Explanation:
Step1: Recall weight formula
Weight $W = mg$, where $m$ is mass and $g$ is acceleration due to gravity ($g\approx10m/s^{2}$ on Earth).
Step2: Substitute values
Given $m = 1kg$ and $g\approx10m/s^{2}$, then $W=1kg\times10m/s^{2}=10N$.
Answer:
C. 10 N