The volume increases, but the surface area remains the same
Answer:D-550 N
Explanation:
Given
mass of student=50 kg
at particular instant elevator is moving downward with acceleration of 1 m/s^2
Net weight of man shown by scale will be more than his actual weight as elevator is decelerating
let N be the normal reaction on man thus
and Normal reaction will be shown by scale as apparent weight
Answer:
It accelerate but will not spin.
Explanation:
If an irregular shaped object is dropped from rest without feeling any form of air resistance it will accelerate without spinning and this is due to the fact that there is no Torque around the center of gravity
(a)
KE = m v^2 / 2 = (1200 kg)(20 m/s)^2 / 2 = 240,000 J
(b)
The energy is entirely dissipated by the force of friction in the brake system.
(c)
W = delta KE = KEf - KEi = (0 - 240,000) J = -240,000 J
(d)
Fd = delta KE
F = (delta KE) / d = (-240,000 J) / (50 m) = -4800 N
The magnitude of the friction force is 4800 N.
Explanation:
u=0, v=?, a=5m/s², t=8sec
So, by the formula,
v=u+at
v=0+5×8
v=40m/s.
hope this helps you .