In Requiem for a Dream, the DP uses a device that straps the camera to the actor's chest to achieve a very subjective shot. What
1 answer:
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Answer:
Explanation:
A mass of 700 kg will exert a force of
700 x 9.8
= 6860 N.
Amount of compression x = 4 cm
= 4 x 10⁻² m
Force constant K = force of compression / compression
= 6860 / 4 x 10⁻²
= 1715 x 10² Nm⁻¹.
Let us take compression of r at any moment
Restoring force by spring
= k r
Force required to compress = kr
Let it is compressed by small length dr during which force will remain constant.
Work done
dW = Force x displacement
= -kr -dr
= kr dr
Work done to compress by length d
for it r ranges from 0 to -d
Integrating on both sides
W =
= [ kr²/2]₀^-4
= 1/2 kX16X10⁻⁴
= .5 x 1715 x 10² x 16 x 10⁻⁴
= 137.20 J
The power in every scenario is the same. Power is the measurement of the energy transfer over time.
<h3>What is power?</h3>Power is the measurement of the energy transfer over time. It can be calculated by the formula,
Where,
- power
- work
- time
In scenario A,
In scenario B,
In scenario B,
Therefore, the power in every scenario is the same.
Learn more about Power:
Answer:
The acceleration of the ball is
Explanation:
From the question we are told that
The maximum height the ball reachs is
The horizontal component of the initial velocity of the ball is
The vertical component of the initial velocity of the ball is
The vertically motion of the ball can be mathematically represented as
Here the final velocity at the maximum height is zero so
Making the acceleration the subject we have
substituting values
The negative sign shows that the direction of the acceleration is in the negative y-axis