Answer:
a)Average velocity = L/t1
b)Average velocity = - L/t2
c)Average velocity = 0
Explanation:
Given that
Length of pool = L
We know that
Average velocity = Total displacement/Total time
Average speed = Total distance/Total time
a)
Average velocity = Total displacement/Total time
Average velocity = L/t1
b)
Average velocity = Total displacement/Total time
The second half of swims it will move in negative x-direction
Average velocity = - L/t2
c)
In round trip ,the total displacement = 0
So
Average velocity = Total displacement/Total time
Average velocity = 0/Total time
Average velocity = 0
Answer: a) 6.67cm/s b) 1/2
Explanation:
According to law of conservation of momentum, the momentum of the bodies before collision is equal to the momentum of the bodies after collision. Since the second body was initially at rest this means the initial velocity of the body is "zero".
Let m1 and m2 be the masses of the bodies
u1 and u2 be their velocities respectively
m1 = 5.0g m2 = 10.0g u1 = 20.0cm/s u2 = 0cm/s
Since momentum = mass × velocity
The conservation of momentum of the body will be
m1u1 + m2u2 = (m1+m2)v
Note that the body will move with a common velocity (v) after collision which will serve as the velocity of each object after collision.
5(20) + 10(0) = (5+10)v
100 + 0 = 15v
v = 100/15
v = 6.67cm/s
Therefore the velocity of each object after the collision is 6.67cm/s
b) kinectic energy of the 10.0g object will be 1/2MV²
= 1/2×10×6.67²
= 222.44Joules
kinectic energy of the 5.0g object will be 1/2MV²
= 1/2×5×6.67²
= 222.44Joules
= 111.22Joules
Fraction of the initial kinetic transferred to the 10g object will be
111.22/222.44
= 1/2
The correct words to fill the given blanks would be as follows:
- Peak
- Trough
- Equilibrium Line
- Oscillation
- Frequency, Hertz
- Period, seconds
- The "peak" is denoted as the highest or maximum point that the wave attains while 'Trough' is characterized as the base of the wave.
- The 'equilibrium line' is characterized as the extent to which the wave flattens or compresses.
- Oscillation is defined as the process in which an object moves in the "back and forth motion."
- Frequency is the amount of occurrences that waves travel in a second which is denoted in the terms of Hertz.
- Lastly, period is the duration required by wave to accomplish one motion is denoted in terms of seconds.
- Amplitude is the breadth or magnitude of the waves.
Learn more about "Oscillation" here:
brainly.com/question/9820984
It should be D. 4 m/s
Hope this helps!
Answer:
See below
Explanation:
rho = R A/l R = resistance A = cross sectional area l = length
