Answer:
v = ((m + M) / m)*√(2*g*h)
Explanation:
Given
m = mass of the projectile
M = mass of the ballistic pendulum
v = initial speed of the projectile
v' = speedof the system (pendulum + projectile) after the inelastic collision
h = maximum height reached for the system
Knowing that is an inelastic collision we have
m*v + M*(0) = (m+M)*v'
⇒ v' = m*v / (m+M)
After the collision, we apply the Principle of the Conservation of Energy
Ki + Ui = Kf + Uf
where
Ui = Kf = 0 J
then
Ki = Uf
0.5*(m+M)*v'² = (m+M)*g*h
⇒ 0.5*v'² = g*h
⇒ v'² = 2*g*h
⇒ (m*v / (m+M))² = 2*g*h
⇒ v = ((m+M) / m)*√(2*g*h)
<h2>The
velocity of a wave in a medium changes with the wavelength</h2>
Explanation:
Wave
It is the periodic disturbance in a medium.
Types of Wave
There are two types of wave in general depending upon their propagation through a substance.
• Mechanical
• Electromagnetic
Mechanical Wave
It is the kind of wave which needs medium to travel.
For example: Sound Wave
Electromagnetic Wave
Is that which can travel through medium as well as through vacuum. For example: Light
Characteristics of Wave
There are certain characteristics that each sound possesses. Let’s see.
Oscillation: It is the complete movement of particle about its mean position.
Amplitude: Is the maximum displacement of particle from its mean position in either direction (cm).It is denoted by ‘A’.
Frequency: It is the number of sound waves produced per second (Hertz).It is denoted by υ(nu)
Time Period: The time taken to complete one oscillation (sec).It is denoted by ‘T’.
Wavelength: The distance between two consecutive crest or trough (cm).It is denoted by λ(lambda).
Velocity of Wave: The speed with which sound travel (m/sec).It is denoted by ‘v’.
Relation between time period, frequency and velocity of wave
We have: frequency =velocity /wavelength
υ=c/λ
Velocity of wave depends upon :
frequency of wave
Wavelength of wave
Therefore , with change in wavelength , the velocity of a wave in medium changes .
Answer:
9m/s2
Explanation:
90 divided by 10 is equal to 9
Answer:
The magnitude of the change in the momentum of the ball during the rebound is 4.4 kg-m/s.
Explanation:
Given that,
Mass of the ball, m = 0.1 kg
Initial speed of the ball, u = 25 m/s
Final speed of the ball, v = -19 m/s (the ball rebounds so it will be negative)
We need to find the magnitude of the change in the momentum of the ball during the rebound. The change in momentum of the object is equal to the difference of final and initial momentum.
or
So, the magnitude of the change in the momentum of the ball during the rebound is 4.4 kg-m/s. Hence, this is the required solution.
Explanation:
#1. The first one would be both because In rowing, the action is the rower pulling the oar through the water, and the reaction is the boat moving the opposite way.
#2. is reaction because for every action force there is an equal and opposite reaction force
#3. is reaction
#4. is action
i really hope this helps you and tell me if i got any wrong.