Answer:
The magnitude of Force is 8.58×10⁵N and direction is upwards
Explanation:
The work beam does on the pile driver is given by
W=(FCos180°)Δx= -F(0.088m)
From work energy theorem
Choosing y=0 at the the level where the driver first contacts the beam and vi=0 at yi=+3.40m and comes to rest again vf=0 at yf= -0.088m
So
The magnitude of Force is 8.58×10⁵N and direction is upwards
The average acceleration in 0.67 m/s^2.
The average acceleration is calculated as change in velocity/time
a=(247*5/18)/(1.7*60)
=68.61/102=0.67 m/s^2
Therefor the average acceleration of the object is 0.67 m/s^2
Answer:
The waves are traveling in a speed of
v=1.20 m/s
Explanation:
The fisherman see a wave at 6m apart so that's the wavelength
Now the period is the time between two successive waves so
The velocity of the waves is describe by:
Answer:
A student becomes negatively charged because of the friction between his socks and the carpet. ... The electrons get rubbed and move towards the carpet so the carpets electrons move away and the student becomes negatively charged.
Placebos are an important part of clinical studies as they provide researchers with a comparison point for new therapies, so they can prove they are safe and effective. They can provide them with the evidence required to apply to regulatory bodies for approval of a new drug.
