Answer:
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
Answer: v =
Explanation: q = magnitude of electronic charge =
mass of an electronic charge =
V= potential difference = 4V
v = velocity of electron
by using the work- energy theorem which states that the kinetic energy of the the electron must equal the work done use in accelerating the electron.
kinetic energy = , potential energy = qV
hence,
Answer:
The correct answer is B
Explanation:
The moment of an object is the product of its mass by velocity, it is described by the equation
p = mv
In this problem they give us the most body and speeds before and after the crash. We must define an environment with both bodies so that the forces during the crash have been internalized and the moment is preserved
Δp = pf -p₀
Δp = m - m v₀
Δp = 2 9 -2 1.5
ΔP = 14.8 m/s
The correct answer is b