Answer:
<em>a) Mechanical advantage is 0.2</em>
<em>b) maximum obtainable mechanical advantage is 1</em>
<em></em>
Explanation:
The opening of the door is only possible when a force is used to push the door, by generating a torque on the door around the hinge.
Since the door is 75 cm wide, torque generated will be the product of the force applied and the width of the door.
torque = F x 75 = 75F
If the door was pushed at point on the door 15 cm from the hinges, the torque that will be generated will be
torque = F x 15 = 15F
a)The mechanical advantage MA is therefore
MA = 15/75 = 0.2
b) <em>The best mechanical advantage that can be obtained from when you simply push it open is 1</em>
From the case above, if we assume we push it at its maximum width from the hinge, then
MA = 75/75 = 1
Answer:
The answer to your question is 6 km/s
Explanation:
Acceleration is a change in velocity with respect to time, its units are m/s² or km/h².
Data
vo = 15 km/h
vf = 45 km/h
t = 5 s
Formula
Substitution
a = (45 - 15) / 5
a = 30 / 5
a = 6 km/s
The speed of a periodic wave disturbance is 2.45 m/s.
<u>Explanation:</u>
Sound waves travel as sinusoidal nature. And the distance between the two successive crests or troughs are determined as the wavelength of the sound wave.
Similarly, the measure of number of complete cycles in a given time is defined as frequency of sound wave. The speed of any wave is determined as the product of wavelength of transmission of wave and frequency of that wave.
Thus,
×
So,
× = 2.45 m/s.
Thus, the speed of periodic wave disturbance is 2.45 m/s.
Depends on where you are located but overall FM is the best choice