B. An apple about to fall from a tree branch
This is because potential energy is the energy before its actuall motion, or before kinetic energy (energy in motion). And the apple ABOUT TO FALL mentions a gravitational example.
gravity, inertia, friction, kinetic energy?
Answer:
the train stopped for 3 seconds
Explanation:
The direction of the angular velocity of the single wheel is the clockwise direction
<h3>Angular velocity</h3>
The angular velocity is the number of revolutions per second of the single wheel. It is given by ω = v/r where
- v = linear speed of the wheel and
- r = radius of the wheel.
<h3>Direction of the angular velocity of the single wheel</h3>
Since the wheels moves forward and the velocity of the wheel is always tangential to the wheel causing it to move forward, its angular velocity is in the clockwise direction
So, the direction of the angular velocity of the single wheel is the clockwise direction
Learn more about angular velocity here:
brainly.com/question/20912191
First, since the echo frequency is greater, the car must be roaming
to the police car.
This is for the reason that the car is "running over" its own wave
fronts, creating the wavelengths tinier, and henceforth increasing the
frequency.
The trick here is to understand that the relative speed between the cars is
half of the speed of the echo for the reason that the echo is returning to the
police car at the similar speed as the sound wave trips to the moving
car.
It would also appear that the speed of sound has been expected to be 337
m/s
So if v is the moving car's velocity, the correct formula to use is:
2v / 337 = (1250/1200) - 1
2v = 14.04 m/s
v = 7.02 m/s
