Answer:
1) The final displacement of cyclist is 20.8 km.
2) The average velocity of cyclist is 18.35 m/h
Explanation:
The path traced by the cyclist is as shown in the attached figure
from the attached figure we can see
1) Initial distance covered = 8.0 km east therefore OA = 8.0 km
2) When the cyclist turns and travels 3.2 km west thus AB = 3.2 km
3) From B the cyclist turns and travels 16 km east thus BC = 16.0 km
As we can see that the total displacement is OC = OA- AB + BC = 8.0-3.2+16 = 20.8 km
Thus the final displacement is 20.8 km.
Part b)
By definition of average velocity we have
The answer is C because mass is the amount of matter in an object. By determining the mass of the apple and pieces, the student will determine the amount of matter.
An object moving in a circle wants to move in a straight line.
The motion of an object is tangent to the circle.
Tangential speed remains constant for an object with uniform circular motion.
Only the direction of the object changes, which means velocity is changing and the object is accelerating
Answer:
67,032 J
Explanation:
According to the law of conservation of energy, the kinetic energy of the boulder just before hitting the Roadrunner (at ground level) will be equal to the gravitational potential energy of the boulder at the top of the cliff, therefore:
where
m is the mass of the boulder
g is the acceleration of gravity
h is the height of the cliff
Here we have
m = 76 kg
g = 9.8 m/s^2
h = 90 m
Substituting,
A dull knife is actually more dangerous than a sharp one because it forces you, as the chef, to add more pressure while cutting.
<h3>Why a dull knife is more dangerous than sharpen knife?</h3>
As the chef we have cut many things. Chef have to look over all the knifes whether it is sharp or dull and whether it is long or short, et.,. They have various knifes that can be used at various places by giving force and that force can be known to be pressure.
Pressure (symbol: p or P) can be defined as the force that can be applied perpendicular for the straight to the surface of an object which will be per unit area over and there the force is gets distributed.
Pressure formula can be, P = F/A N/m².
Thus, dull knife is more dangerous than the sharp, because of the pressure.
Hence, Option D is the correct answer.
Learn more about the pressure,
brainly.com/question/12977546
#SPJ1