After the foot leaves the ball, the acceleration is always downward and is equal to g at all points
Answer:
Secondary current is 8A
Explanation:
Data :
Primary supply = Vp = 240 V
Secondary supply = Vs = 60V
Primary current = Ip = 2A
Secondary current = Is = ?
Formula : Vp × Ip = Vs × Is
So for secondary current formula becomes
Is = (Vp/Vs)×Ip = (240/60) × 2
Is = 4 × 2 = 8A
Answer:
v = 66.7 m/s
Explanation:
Given that,
The length of steel cable, L = 600 m
Diameter = 1.2 cm
It is observed that it took 18 s for the pulse to return.
The time taken to cover 600 m will be :
t = T/2
t = 9 s
Let v be the of the pulse. We know that,

So, the speed of the pulse is equal to 66.7 m/s.
Answer:

Explanation:
It can be assumed that the finally it reaches to a height of 16 m. He starts from 6.5 m
Mass, m = 1700 Kg
Let
is the change in potential energy. It is given by:



So, it will lose 158270 joules of energy in friction. Hence, this is the required solution.