Answer:
A system that includes the stone and the earth.
Explanation:
If the system of being dropped from the height of the cliff consists of just the stone alone, then it means that its momentum will certainly undergo changes as it falls freely. However, If the system is now expanded to include not only the stone but also the Earth, then it implies that the momentum of the stone which is in the downward direction will be equal and opposite to the momentum of the Earth in the upwards direction towards the stone. Therefore, the momentum will cancel out and net momentum will be zero.
PART A)
Impulse is defined as change in momentum
here finally after hitting the wall car comes to rest
So final momentum of the car will be ZERO
Initial momentum of the car is given as
here m = 2000 kg
v = 77 m/s
now we have
so here impulse will be
PART B)
As we know that force of impact is defined as
so here it is ratio of impulse and time
so if we increase the time of impact by 3 times
so the force will be decrease by factor of 1/3
so here force is decreased by 1/3
Answer: the volleyball
Explanation:
The volleyball, in contrast, is full of air, which contains fewer, more widely spaced particles of matter. In other words, the matter inside the bowling ball is denser than the matter inside the volleyball. A bowling ball is denser than a volleyball.
Direct evidence is evidence heard from a witness about the subject in question. For instance, if there is a terrorist attack carried out by an independent person, the people close to them could supply crucial evidence, such as if they were acting weirdly in the past month. Hope this helped!
If light is traveling through a medium (i.e. air), the color of light depends on the wavelength.
The following are wavelength intervals of colors on the visible light spectrum. Measured in nanometers (nm).
Red: 700–635 nm
Orange: 635–590 nm
Yellow: 590–560 nm
Green: 560–520 nm
Blue: 490–450 nm
Violet: 450–400 nm