Question

A 4 kg object is suspended by a string from the ceiling of an elevator.

The acceleration of gravity is 9.8 m/s2 .

Determine the tension in the string if it is accelerating upward at a rate of 2.4 m/s2.

Answer in units of N

part 2

Determine the tension in the string if it is accelerating downward at a rate of 2.4 m/s2.

Answer in units of N

Answer 1

PART 1
4kg(2.4+9.8)
4(12.2)
48.8N

Answer 2

PART 2
m(g-a)
=4(9.8-2.4)
=4(7.4)
=29.6