You are standing on a bathroom scale in an elevator in a tall building. Your mass is

64 kg. The elevator starts from rest and travels upward with a speed that varies with time according to v(t)=(3.0m/s2)t+(0.20m/s3)t2.

When
t=4.0s, what is the reading of the bathroom scale?

94 kg or 921.6 N

Explanation:

The velocity function is . The acceleration function, a(t), is the time derivative of the velocity function.

At ,

Because the elevator is going upwards, the net acceleration, where g us acceleration of gravity.

The resultant weight is

Since the bathroom scale is graduated in kg, it's reading is

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

spare some change and give it to the poor

explanation:

plz : ((