Answer:
a) a = 4.9 m / s², N = 16.97 N and b) F = 9.8 N
Explanation:
a) For this exercise we will use Newton's second law, we write a reference system with the x axis parallel to the plane, see attached, in this system the only force we have to break down is weight, let's use trigonometry
sin 30 = Wx / W
cos 30 = Wy / W
Wx = W sin30
Wy = W cos 30
Let's write the equations on each axis
X axis
Wx = ma
Y Axis
N- Wy = 0
N = Wy = mg cos 30
N = 2.0 9.8 cos 30
N = 16.97 N
We calculate the acceleration
a = Wx / m
a = mg sin 30 / m
a = g sin 30
a =9.8 sin 30
a = 4.9 m / s²
b) For the block to move with constant speed, the acceleration must be zero, so the force applied must be equal to the weight component
F -Wx = 0
F = Wx
F = m g sin 30
F = 2.0 9.8 sin 30
F = 9.8 N
Good morning.
We see that
The magnitude(norm, to be precise) can be calculated the following way:
Now the calculus is trivial:
Answer:
Amplitude = 5 cm
Wavelength = 30 m
Explanation:
Amplitude is the maximum displacement. According to the graph, the maximum height is the maximum displacement which is equal to 5cm.
Wavelength is the same distance between two successive Crest or trough.
From the graph the wavelength is 30 metres.
That is,
Amplitude = 5 cm
Wavelength = 30 m
Answer: Option B) chemical --> electrical
Explanation:
Batteries convert their stored chemical energy into electrical energy in order to power appliances.
So, the conversion of chemical energy to electrical energy explains how energy is conserved in nature, such that energy is neither created nor destroyed.
