Answer:
(a) T = 0.015 N
(b) M = 1.53 x 10⁻³ kg = 1.53 g
Explanation:
(a) T = 0.015 N
First, we will find the speed of waves:
where,
v = speed of wave = ?
f = frequency = 120 Hz
λ = wavelength = 6 cm = 0.06 m
Therefore,
v = (120 Hz)(0.06 m)
v = 7.2 m/s
Now, we will find the linear mass density of the coil:
where,
μ = linear mass density = ?
m = mass = 1.45 g = 1.45 x 10⁻³ kg
l = length = 5 m
Thereforre,
Now, for the tension we use the formula:
<u>T = 0.015 N</u>
<u></u>
(b)
The mass to be hung is:
<u>M = 1.53 x 10⁻³ kg = 1.53 g</u>
Answer:
I'm not really sure but I think it's choice a
Answer:
a) a = 8m/s^2
b) a = 9.8m/s^2
c) a = 200m/s^2
d) a = 9.8m/s^2
Explanation:
Using the laws of newton:
F = ma
where F is the force, m the mass and a the aceleration
a) Solving for the aceleration:
a = F/m
so, replacing the force and the mass of Blanche, we get:
a = 800N/100kg
a = 8m/s^2
b) By the laws of newton, the sumatory of vertical force for Blanche is equal to:
mg = ma
Where g is the gravity
Then, solving for a:
a = g
a = 9.8m/s^2
c) At the same way, solving for the aceleration:
a = F/m
so, replacing the values of the force and the mass of the shot, we get:
a = 800N/4kg
a = 200m/s^2
d) Then, sumatory of vertical force for the shot is equal to:
mg = ma
where g is the gravity
solving for a:
a = g
a = 9.8m/s^2
Answer:
(a) 
(b) 
Explanation:
The average power is defined as the amount of work done during a time interval:
According to work-energy theorem, the work done is equal to the change in kinetic energy. So, we have:
Recall that the weight is given by:
The car accelerates uniformly from rest (
). Replacing (3) in (2), we have:
(a) Finally, we replace this in (1):
(b)
