The force acting on the ball are unbalanced. Reactionary momentum force (that originated as a result of the swing of the bat) is the most powerful.
Yes friction is acting on the ball. In course of journey it would slow the ball down and make it trace a parabolic path rather than straight path as intended by hitter.
Explanation:
As the hitter hits the ball, momentum of the bat due to swing (mass of the bat*velocity provided by the batsman swinging action of bat) gets transferred on the ball on its impact with the bat.
Since ball’s mass is quite small as compared to the bat, the velocity of the ball increases by the same factor by which the ball’s mass is lower than the bat’s mass. This velocity causes forward motion of the ball (of course in the direction of bat’s motion, here the batsman intends to send the ball straight away hence the ball would move straight).
Various forces on ball is-
- Reactionary momentum force -bat’s force (most powerful force)
- The frictional force of the air (opposing the motion of the ball through the air)
- Gravity force (pulling the ball down to the Earth)
As a combined effect of these force when all the force remains unbalanced, the ball moves away in the straight path under the impact of bats momentum which was most powerful of all.
Frictional force and Gravity force continue acting on the ball. While frictional forces decrease the ball velocity through the air, gravity force pulls it down thus deflecting its direction. Under the combined impact of declining bats momentum, friction force and gravity force, the ball traces a parabolic path (in accordance with the first law of motion from Newton)
Answer:
The correct answer is d
Explanation:
In this exercise they ask us which statement is correct, for this we plan the solution of the problem, this is a Doppler effect problem, it is the frequency change due to the relative speed between the emitter and the receiver of sound.
The expression for the Doppler effect of a moving source is
f ’= (v / (v- + v_s) f
From this expression we see that if the speed the sound source is different from zero feels a change in the frequency.
The correct answer is d
Answer:
Maximum linear charge density = 84.14 nC/m
Explanation:
Looking at this question, The electric field of a line charge of infinite length is given
by : Er = (1/(2πεo)) x (λ/r)
r = the distance from the center of the line of charge
λ = the linear charge density of the wire.
Now looking at the equatiom, due to the fact that Er varies inveresely with r, its maximum value will occur at the
surface of the wire where r = R, the
radius of the wire:
And so, Emax = (1/(2πεo)) x (λ/R)
Let's make λ the subject of the equation and we get;
λ = 2πεo(REmax)
From the question, R = 0.55/2 = 0.275cm
Also, Emax = 5.50 × 10^(6)
N/C
Let's take the value of the electric constant to be εo = 8.854 x 10^(-9) C^(2) / Nm^2
R = 0.275mm = 0.000275m
Plugging these values into the equation, we get;
λ = 2π x 8.854 x 10^(-12) x 0.000275 x 5.50 × 10^(6) = 84.14 nC/m
No it does not . That is the answer
Answer:
Explanation:
A unit used to measure a vector quantity is the
c) Newton
