(a) If the tension in the cord is 96 N, what is the lamp's mass?
2006-09-26 19:00:36 · 2 answers · asked by mac 1 in Science & Mathematics ➔ Physics
Wow you are so much smarter than me is is amazing. Are you studying physics? If I knew what N meant I would give it a go. Unfortunately, I don't. I guess the mass is the same as when it started. Acceleration and deceleration don't affect massdo they? Maybe driving fast is why people are gaining weight!
;-D That pesky N just beat me!
2006-09-26 19:07:34 · answer #1 · answered by China Jon 6 · 0⤊ 2⤋
The descending elevator is decelerating, so the elevator is actually accelerating upward to decrease the speed.
Free body diagram would prove to be really useful at this point.
Recognize the forces on the lamp.
1> weight downwards
2> Tension upwards
Since the lamp is at rest from the lift frame, it is also accelerating upwards at 1.5m/s^2 .
Framing the force equation,
Tension - weight = mass of lamp * acceleration
=> T - mg = ma
=> m= T/(m+a)
Plug in values to get the answer.
2006-09-27 02:07:34 · answer #2 · answered by astrokid 4 · 0⤊ 2⤋