Answer:
a)v=5.81 m/s
b)N= 831.77 N
Explanation:
Given that
m = 39 kg
r= 2.98 m
T= 416 N
a)
Lets take speed of the boy at the lowest position is v m/s
The radial force Fc
The tension in the chain is T
Now by putting the values
v²=33.77
v=5.81 m/s
b)
Lets take normal force = N
Now by putting the values
N= 831.77 N
Answer:
Yes, cause when listener is far away from music source... the listener feels it's pleasant.... but when observer approaches near loudspeaker... sound become unpleasant..........sound becomes noise when frequency crosses 85 Decibels.....so you can say that the voice from loudspeaker also get shrill when the listener reaches the surrounding source......
Answer:
Heat sink is a heat exchanger used to transfer heat generated by a mechanical or an electronic device to the surroundings. Heat sinks are either made up of aluminium or copper or any other material which is good conductor of heat. Because conductor helps in conduction of heat from heated surface to the outside air.
Answer:
Equal to change in momentum of larger mass.
Explanation:
We are given that
Two difference masses .
Force act on both masses for the same length of time.
We have to find the change in momentum of the smaller mass.
Let M and m are two masses
M>m
We know that
Change in momentum for large mass=
Change in momentum for small mass=
Because Force and length of time are same for both masses .
Hence, the change in momentum of smaller mass is equal to change in momentum of larger mass.
(a) 96 m/s
The impulse theorem states that the impulse exerted on the ball is equal to the change in momentum of the ball:
where
is the impulse exerted on the ball
is the mass of the ball
is the final speed of the ball
is the initial speed of the ball
Solving the equation for v, we find
(b) 952.9 N
The impulse is also equal to the product between the average force and the contact time:
where here we have
is the impulse
is the average force
is the contact time
Solving the equation for F, we find the force: