Can you please help me with this? The figure shows the velocity graph of a 78kg
ID: 1267014 • Letter: C
Question
Can you please help me with this?
The figure shows the velocity graph of a 78kg passenger in an elevator. (Figure 1) What is the passenger's apparent weight at t = 1 s? Express your answer to two significant figures and include the appropriate units. What is the passenger's apparent weight at t = 5 s? Express your answer to two significant figures and include the appropriate units. What is the passenger's apparent weight at t = 9 s? Express your answer to two significant figures and include the appropriate units.Explanation / Answer
at t=1 acceleration = dv/dt = slope of the curve = 8/2 = 4
apaarent weight = mg + ma = 78(9.81+4) = 1077.18 = 11 x 10^2 N
at t=5 slope is zero
a = 0
apparent weight = 78*9.81 = 76 x 10^1 N
at t=9 slope = 8(10-6) = 2 (decreasing)
apparent weight = 78(9.81-2) = 61 x 10^1 N