Suppose the acceleration of an elevator is 1/2 g upward, then what is the reading on the scale in the elevator. a. 1/2 mg
b. 2 mg
c. 3/2 mg
d. m

c. 3/2 mg

Explanation:

Given that the acceleration of an elevator is 1/2 g upward.

The reading on the scale of the elevator is the net external force acting on the elevator.

Let the force F acting on the elevator as shown,

By using Newton's 2nd law,

where, is the net force acting on the elevator.

m is the mass of the elevator,

a is the acceleration of the elevator, as given a=1/2 g upward.

So,

So, the reading on the scale in the elevator is .

Hence, option (c) is correct.

0.19 m/s and 0.45 m/s

connect the batteries in series and hope