Hello
We know that when the fisherman casts his line, it will travel in a parabolic path, typical to that of a projectile's motion.
Whenever an object is in projectile motion, its velocity has two components, the x-component and y-component. The x component is usually constant with acceleration 0; however, as we know that the acceleration due to gravity acts on any object moving vertically. This will be our acceleration for the vertical component. Now, we apply the equation of motion for the vertical component of velocity:
v^2 = u^2 +2as; where v is the y-component final velocity, u is y-component of the initial velocity, s is the distance traveled and a is the acceleration.
Whenever an object attains "maximum height", its vertical velocity instantaneously becomes 0; therefore, v = 0.
a = -9.81 m/s^2 (negative sign because velocity is upwards while acceleration downwards)
s = 2.9 m as stated
Plugging the values into the equation, u (vertical component of initial velocity) works out to be:
7.54 m/s in the vertical direction.
The vertical component of the velocity is:
velocity * sin(angle with horizontal)
Thus, velocity =
7.54/sin(25)
= 17.8 m/s
Answer:
Eye function renders you the sense of sight. They convert light into electrical signals. Afterwards, the brain deciphers these electrical signals into images. Properly working healthy eyes are able to perform the following functions.
Explanation:
Answer:A loudspeaker produces a musical sound by means of the oscillation of a diaphragm. The loudness of sound produced depends upon Amplitude of vibration.
<u>Explanation:</u>
The loudness of a sound depends upon the amplitude of vibrations. A sound will be louder if the amplitude of vibration is greater but if it is smaller than sound will not be louder.
Now it is the vibration of a sound that determines it's amplitude. Amplitude signifies the maximum distance moved. It means the extent of vibration If is vibrations have more amplitude than sound will be louder but if the amplitude of vibrations is shorter than the sound will be softer.
<h2>Answer to Q1: </h2>
<u>The correct option is </u><u>bat pushes on the ball with the same force as the ball pushes on the bat.
</u>
<h2>
Explanation:
</h2>
According to Newton’s law action and reaction are equal in magnitude but opposite in direction so the same case will apply here. The bat pushes on the ball with the same force as the ball pushes on the bat just the direction is opposite.
<h2>Answer to Q2
</h2>
Mass will remain the same
<h2>Explanation:
</h2>
The gravitational pull is related to the weight of objects. Weight is the force with which earth attracts everything towards its centre. And mass is the quantity of matter inside the body. So on the moon the quantity of matter inside a body does not change therefore the mass would remain the same.
<h2>Answer to Q3
</h2>
Force required is 16 Newton
<h2>Explanation:
</h2>
Mass= 80 kg
Acceleration = a = 0.2
So F = ma
Putting the values
F= 80 x 0.2
F = 16 N