Multiple Choice
A lamp of mass m hangs from a spring scale which is attached to the ceiling of an elevator.When the elevator is stopped at the fortieth floor,the scale reads mg.What does it read as the elevator slows down to stop at the ground floor?
A) more than mg
B) less than mg
C) mg
D) zero
E) One cannot tell without knowing how fast the elevator is stopping.
Correct Answer:

Verified
Correct Answer:
Verified
Q69: The diagrams below show the application of
Q70: According to Newton's law of inertia,<br>A)objects moving
Q71: Which of the following is not a
Q72: If two metal blocks of different masses
Q73: A frictionless pulley of negligible mass is
Q75: The figure below shows two forces,F<sub>1< /
Q76: A lamp with a mass m is
Q77: A physical quantity that is sometimes described
Q78: A frictionless pulley of negligible mass is
Q79: The force needed to accelerate "Opportunity" (Opportunity