Answer:
3.7 m/s^2
Explanation:
The period of a pendulum is given by:
where L is the length of the pendulum and g is the free-fall acceleration on the planet.
In this problem, we know that the period of the pendulum on Earth is:
while the period of the same pendulum on Mars is
And since the length of the pendulum L does not change, we can write:
where
is the free-fall acceleration on Earth
is the free-fall acceleration on Mars
Re-arranging the equation and substituting numbers, we find:
Distance to the moon: 238,900 miles
238,900 divided by 100= 2389 hrs
2389 hrs divided 24 hrs= 99.5 Days
Given you could “drive” to the moon, it would take about 100 days
As you run toward a source of sound, you perceive the frequency of that sound to decrease.
<u>Explanation:</u>
Doppler's effect is a principle used to describe the frequency and the intensity of sound and wavelengths of a source and observer with the two possibilities.
(i) Stationary sound source and moving observer.
(ii) Moving sound source and a stationary observer. It is a relative motion.
Consider when the observer is moving towards a source, the frequency of the sound will be higher and when moving away from the source, the frequency will decrease.
The work done to push the box is equal to the product between the force and the distance through which the force is applied:
In our problem, the force is F=1.4 N and the distance covered is d=150 m, so the work done by pushing the box is
