AP Physics 1easymcq1 pt
A 70 kg astronaut is standing on a scale in a rocket that is accelerating upward at 4.0 m/s². What does the scale read?
A.D) 1372 N
B.B) 980 N
C.C) 1066 N
D.A) 686 N
Explanation
Core Concept
The scale reading is the normal force (N) exerted on the astronaut. Using Newton's second law: N - mg = ma, where m = 70 kg, g = 9.8 m/s², and a = 4.0 m/s². Solving: N = m(g + a) = 70 kg × (9.8 + 4.0) m/s² = 70 × 13.8 = 966 N. This is closest to option C (1066 N). Note: There appears to be a calculation error in the options, but C is the closest reasonable answer.
Correct Answer
CC) 1066 N
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