9) An empty 160 kg elevator accelerates upward at 1.5 m/s2 The acceleration of g
ID: 1961089 • Letter: 9
Question
9) An empty 160 kg elevator accelerates upwardat 1.5 m/s2
The acceleration of gravity is 9.8 m/s2
What is the tension in the cable that lifts
the elevator cab?
10)An elevator accelerates upward at 1.2 m/s2
The acceleration of gravity is 9.8 m/s2.
What is the upward force exerted by the
?oor of the elevator on a(n) 83 kg passenger?
Answer in units of N
If the same elevator accelerates downwards
with an acceleration of 1.2 m/s2
what is the upward force exerted by the elevator ?oor on
the passenger?
Answer in units of N
Explanation / Answer
9) tension = mass * acceleration tension = 160 * (1.5+9.8) = 1808 N 10) force = mass * acceleration force = 83 * (1.2 + 9.8) = 913 N force = mass * acceleration force = 83 * (9.8 - 1.2) = 713.8 N
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