Answer:
The work done will be 57.15 J
Explanation:
Given that,
Mass = 12 kg
Distance = 3 m
Force = 22 N
Angle = 30°
We need to calculate the work done
The work done is defined as,
Where, F = force
d = displacement
Put the value into the formula
Hence, The work done will be 57.15 J
(1) The pendulum will have maximum velocity at the lowest point and it will be the most difficult point to stop.
(2) Velocity at maximum height is zero and it will be the easiest point to stop the pendulum.
(3) The total mechanical energy of the pendulum would be the same at all point.
<h3>Point of maximum velocity of the pendulum</h3>
A pendulum has maximum kinetic energy at the lowest point. The kinetic energy is given as;
K.E = ¹/₂mv²
The pendulum will have maximum velocity due to maximum kinetic energy at the lowest point and it will be the most difficult point to stop.
<h3>Point of maximum height of the pendulum</h3>
A pendulum has maximum potential energy at the highest point. The potential energy is given as;
P.E = mgh
Velocity at maximum height is zero and it will be the easiest point to stop the pendulum.
<h3>Conservation of energy</h3>
In absence of friction, the total mechanical energy will be conserved. Thus, the total mechanical energy of the pendulum would be the same at all point.
Learn more about pendulum here:brainly.com/question/26449711
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<span>A pulley is able to do that.</span>
Answer:
IN MOTION
Explanation:
An apparent change in the frequency of waves, as of sound or light, occurring when the source and observer are in motion relative to each other, with the frequency increasing when the source and observer approach each other and decreasing when they move apart.
