Apparent weight

A boy stands on a bathroom scale in an elevator. His normal weight is 600 N and the scale reads 720 N,

the elevator's acceleration is

• Positive because the apparent weight more than the real weight

• Positive because the real weight more than the apparent weight

• zero

• the information is not enough to know

A boy stands on a bathroom scale in an elevator. His normal weight is 600 N and the scale reads 520 N,

the elevator's acceleration is

• downward

• upward

• zero

• the information is not enough to Answer

A boy stands on a bathroom scale in an elevator. His normal weight is 600 N and the scale reads 600 N,

the elevator's acceleration is

• positive

• negative

• zero

• the information is not enough to answer

A 100 kg man is standing on a bathroom scale in an

elevator. What is the scale reading when the elevator

is moving upward with a constant speed?

• 0 N

• 900 N

• 1000 N

• 2000 N

When a 45-kg person steps on a scale in an

elevator, the scale reads a steady 480 N. Which of the

following statements must be true?

I. The elevator is accelerating upward at a

constant rate.

II. The elevator is accelerating downward at a

constant rate.

III. The elevator is moving upward at a constant

rate.

IV. The elevator is moving downward at a

constant rate.

V. From the given information, we cannot tell if

the elevator is moving up or down.

• I ans II only

• II and III only

• II and IV only

• I and V only

if the elevator moving upward and slowing down,

• the real weight equals the apparent weight

• the apparent weight is less than the real weight because the acceleration is downward,

• the apparent weight greater than the real weight because the acceleration is upward.

if the elevator moving upward and speeding up,

• the apparent weight greater than the real weight because the acceleration is upward.

• the apparent weight is less than the real weight because the acceleration is downward,

• the apparent weight equal the real weight

if the elevator moving downward and speeding up,

• the apparent weight greater than the real weight because the acceleration is upward.

• the apparent weight is less than the real weight because the acceleration is downward,

• the apparent weight equals the real weight

if the elevator moving upward and slowing down,

• the apparent weight greater than the real weight because the acceleration is upward.

• the apparent weight is less than the real weight because the acceleration is downward,

• the apparent weight equals the real weight

when the elevator moving with constant velocity

• the apparent weight is less than the real weight

• the apparent weight greater than the real weight

• the apparent weight equals the real weight