Lift Weight
Classical Mechanics
Level
2
Pam normally weighs \(\SI{60}{\kilo\gram},\) but one day she measured her weight in an elevator as \(\SI{70}{\kilo\gram}.\)
Can we say for sure whether the elevator was moving up or down at the moment she measured her weight?
The red arrows indicate the direction of motion.
Hint: Consider not just the velocity, but the acceleration of the elevator. Do velocity and acceleration always have the same direction?
by
Pranshu Gaba