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) = (3.0 m/s2)t + (0.20 m/s3)t2. When t = 4.0 s, what is the reading on the bathroom scale?

= 922N

Explanation:

m = 64kg

v(t) = (3.0 m/s²)t + (0.20 m/s³)t².

t = 4.0s

differentiation of v(t) so the acceleration is given by

using Newton’s second law

F (net) = ΣFg = ma

⇒R - w = ma

R = m(a + g)

 = 64 (9.81 + 4.6)

 = 922N

dopamine..

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okay i have so many questions. but the big one here is: um wt..f is this mess? ?