The formation of an ionic bond involves the? a) sharing of electrons b) transfer of neutrons c) transfer of electrons d) transfe
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Answer:
<h3><em>28.01m/s.</em></h3>Explanation:
Given maximum height reached by the ball as H = 40 metres
Since the ball rises straight up when hit by a ball, then the angle of launch will be perpendicular to the ground and that is 90°.
To determine the upward speed of the ball in meters per second after it got struck by the bat, we will use the formula for calculating the maximum height according to projectile motion;
Maximum Height H = where;
u is the speed of the ball
is the angle of launch
g is the acceleration due to gravity = 9.81m/s²
Substituting the given parameters into the formula;
<em>Hence the upward speed of the ball in meters per second after it got struck by the bat is 28.01m/s.</em>
As per the question, the resistor system contains two resistors.
The two resistors are denoted as
We are asked to calculate the effective resistance in terms of
The two resistors can be connected in two ways.
CASE-1: Let the resistors are connected in series.
When the resistors are connected in series, the effective resistance is the algebraic sum of the individual resistors.
Hence, the effective resistance [ans]
CASE-2: Let the resistors are connected in parallel.
The effective resistance is calculated as follows-
⇒ [ans]
#1
initial height = 25000 ft
as we know that
1 ft = 0.3048 m
so we have
H = 25000(0.3048) = 7620 m
#2
If mass of the man = 90 kg
now the initial potential energy is given as
#3
Gravitational force that is acting on it is given by
so this is the force by which earth is attracting him towards it as we can see due to this force the man is accelerating towards the earth
#4
As we know that gravitational force is given by
here we know that
r = R + h
R = radius of earth ()
h = 7620 m
now we have acceleration at that point is
#5
by energy conservation we have
#6
final speed due to wind resistance is 150 mph
now we know that
1 mile = 1609 meter
so this speed in m/s is given as
#7
No Luke is not accelerating when his speed is 150 mph
because at this speed his velocity will become constant
and since there is no change in velocity so his acceleration will become zero
#8
since at 150 mph the acceleration of Luke is zero
so net force on him must be zero
so we will have
wind force = weight or force due to earth
#9
If there is no wind resistance then there will be energy conservation
so KE = PE
#10
Net will reduce the velocity of luke to be zero by taking long time
As we know that force on a system is given by
so if we increase the time interval here then we will have less force
so Luke will unhurt due to more time to decrease his speed to be zero