94. While you are traveling in a car on a straight, level interstate highway at 90 km/h another car passes you in the same direction, its speedometer reads 120 km/h (a) What is your velocity relative to the other driver? (b) What is the other car's velocity relative to you?
Answers
Answer:
a) = -30 m/s
b) = 30 m/s
Explanation:
a)
Consider the car A travel at a velocity of = 90 km/h and the car B travel at the velocity of
= 120 km/h. As the velocity of the car B is greater than the car A, So it cross the car A. Consider The velocity of car A relative to car B is
and it is equal to the velocity of car A minus the velocity of car B.
=
-
= 90 - 120
= -30 m/s
b)
Consider The velocity of car B relative to car A is and it is equal to the velocity of car B minus the velocity of car A.
=
-
= 120 - 90
= 30 m/s
Related Questions
8 Explain How can subsidence lead to the formation of sedimentary rock
Is radioactive decay used to determine absolute or relative age?
Someone in a car going past you at thespeed of 46 m/s drops a small rock from aheight of 2.2 m.How far from the point of the drop will therock hit the ground? The acceleration due togravity is 9.8 m/s2.
How is acceleration of the cart related to the amount of force acting on it? the strips of it?
Answers
Answer:
put water at room temperature into a vacuum chamber and begin removing the air. Eventually, the boiling temperature will fall below the water temperature and boiling will begin without heating.
Answers
v=u+at
0=70+a(35)
-70=35a
a=-2m/s^2
Decelerate 2ms^-2 or acceleration is -2ms^-2
Answers
We already know that from everyday life examples such as simply pushing a car that if 2 people push a car on a flat road it will accelerate faster than if one person was pushing it... Therefore, there is a relationship between the size of the force and the acceleration.
Now onto the third law of motion. First of all, what is the third law of motion? Well, a force is a push or a pull that acts upon an object as a results of its interaction with another object. Forces result from interactions! According to Newtons third law, whenever one object, and another object interact with each other, they exert forces upon each other. "For every action, there is an equal and opposite reaction." The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. So, how is this important to everyday life you may ask?
Well, the action-reaction force pairs are found everywhere in your body.
For example, right now as I am typing, my tendons are exerting forces on bones, and those bones exert reaction forces on the tendons, as muscles contract, pulling my fingers on the keys. I press on those keys, and they press back on my fingers. See? Since im pressing on the keys, the press back on me. Its opposite from eachother, as stated in the quite above. "For every action, there is an equal and opposite reaction."
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~I hope this helped :)
B. Gravitational force
C. Magnetic force
D. An unknown force
E. An orbit force free
Answers
Answers
Answer: 25 N
Explanation:
the fist hit by the black belt Alice in the Taekwondo has been given to have a mass of 0.5 kg which acquires a velocity of 5 m/s in a time of 0.1 sec, therefore, the average net force which is being applied to the fist can be calculated by the following method,
Given, mass m=0.5 kg, velocity v=5 m/s, time t=0.1 sec
As we know that, acceleration
Thereby,
Answer:
25N
Explanation:
Find acceleration first
A=v-u/t
acceleration = 5/0.1s =50m/s^2
then find net force using f=mass x acceleration, which iin this case is 25N
revolution of Earth around the Sun
Earth’s elliptical orbit in space
moon’s orbit around Earth
Answers
The movement causes day and night on Earth is the rotation of Earth.
What is rotation?
The rotation is the spinning around of an object about its own axis passing through the center.
When the Earth rotates about its own axis, the rotation completes in 24 hours. This causes the day to night and night to day. When the part of Earth is in front of Sun, there is day. But, when the same part of Earth goes away from the Sun, the sunset occurs and then eventually night occurs.
Thus, the movement causes day and night on Earth is the rotation of Earth.
Learn more about rotation.
#SPJ5
The movement that causes day and night on Earth is the rotation of the earth on its axis, which is in option a as the earth rotates from west to east, completing one full rotation in approximately 24 hours.
As the Earth rotates, the side facing the sun experiences daylight, while the opposite side facing away from the sun experiences nighttime. This rotation creates the cycle of day and night that we observe on Earth. The other movements mentioned, such as the revolution of Earth around the Sun, Earth's elliptical orbit in space, and the moon's orbit around Earth, are not directly responsible for causing day and night.
Learn more about the earth's rotation here.
#SPJ6