An astronaut in a space suit has a total mass of 143.5 kg and is ...

[jCorn1234]

An astronaut in a space suit has a total mass of 143.5 kg and is standing on a scale that reads in newtons inside an elevator. If the elevator accelerates upward at the rate of 1.8 m/s2, what does the scale read?
 a. 703.2 N b. 1,406.3 N
  c. 882.3 N d. 1,664.6 N

Question 2

Two identical airplanes are executing identical turns around a pylon. One of them is moving at 200 mph, and the other is moving at 100 mph. The centripetal force acting on the airplane moving at 200 mph is __________ the value of the centripetal force acting on the airplane moving at 100 mph.
 a. one quarter b. one half
  c. the same as d. twice
  e. four times

[nyrave]

Answer to Question 1

d
RATIONALE: Fup = W + ma = (1,406.3 N) + (143.5 kg)(+1.8 m/s2) Fup = 1,664.6 N rounded to one decimal place

Answer to Question 2

e
RATIONALE: Centripetal force = mv2 / r; since v1 = 2v2 ; the force is (2)2 or 4 times as great.