Answer:
height is 69.68 m
Explanation:
given data
before it hits the ground = 46 % of entire distance
to find out
the height
solution
we know here acceleration and displacement that is
d = (0.5)gt² ..............1
here d is distance and g is acceleration and t is time
so when object falling it will be
h = 4.9 t² ....................2
and in 1st part of question
we have (100% - 46% ) = 54 %
so falling objects will be there
0.54 h = 4.9 (t-1)² ...................3
so
now we have 2 equation with unknown
we equate both equation
1st equation already solve for h
substitute h in the second equation and find t
0.54 × 4.9 t² = 4.9 (t-1)²
t = 0.576 s and 3.771 s
we use here 3.771 s because 0.576 s is useless displacement in the last second before it hits the ground is 46 % of the entire distance it falls
so take t = 3.771 s
then h from equation 2
h = 4.9 t²
h = 4.9 (3.771)²
h = 69.68 m
so height is 69.68 m
Explanation:
A point charge is a model that represents a charge as acting uniformly on its surroundings. The characteristics of a point charge are as follows :
- Electric field lines are outwards if the charge is positive.
- Electric field lines are inwards if the charge is negative.
- If the distance from the point charge increase, the magnitude of the electric field decreases and vice versa.
Answer: it says that the magnitude of average velocity is always equal to average speed so therefore it would be the last option
Answer:
0.04328 H
0.00288 seconds
0.01326 seconds
Explanation:
V = Voltage = 6.3 V
R = Resistance = 15 Ω
L = Inductance
I = Decayed current = 0.21 A
t = Time to decay = 2 ms
Maximum Current is given by

Current in the circuit is given by

The inductance is 0.04328 H
Time constant is given by

Time constant is 0.00288 seconds
Time required is given by

The time to reach 1% of its original value is 0.01326 seconds