Answer:
Kinematics is a <em>subfield of physics, developed in classical mechanics, that describes the motion of points, bodies (objects), and systems of bodies (groups of objects) without considering the forces that cause them to move.</em>
Explanation:
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Blazetoxic123
Answer:
N = 731 N
Explanation:
From the question, we recall the following
The mass m = 250 kg
The initial kinetic energy T₁ = 0
The initial kinetic energy T₂ = 1/2 mv²
velocity = v at B
thus,
The work is carried out because of the weight
so,
U₁→₂ = W * h
= (250 * 9.81) * (27 m - 27 cos 40 m)
which is =15491.95 N.m
From the energy principle - from work
T₁ + U₁→₂ = T₂
We can say,
0 + 15491.95 N.m = 1/2 * 250 kg * v²
v = 11.13 m/s
Now we solve for the normal acceleration
aₙ = v²ρ = (11.13 m/s)²/27 m
aₙ = 4.588 m/s²
Now, by applying the second law
∑Fy = -maₙ
or we say that, N - W cos 40° = -maₙ
so,
N = 250 * 9.81 N cos 40° - 250 kg * 4.588 m/s²
Therefore N = 731 N
(10 seconds) / (2 cycles) = (10/2) (sec/cycle) = 5 seconds.
That's the pendulum's period.
Frequency = 1 / (period) = 1/5 per second = 0.2 Hz.
W = F x d
F: 450 N
d = 10 m
plug your variables into the equation to get W = 450N x 10m
Answer:
19.53 cm
Explanation:
The computation of the height is as follows:
Here we applied the conservation of the energy formula
As we know that
P.E of the block = P.E of the spring
m g h = ( 1 ÷ 2) k x^2
where
m = 0.15
g = 9.81
k = 420
x = 0.037
So now put the values to the above formula
(0.15) (9.81) (h) = 1 ÷2 × 420 × (0.037)^2
1.4715 (h) = 0.28749
h = 0.19537 m
= 19.53 cm