Answer:Friction force
Explanation:
The frictional force is responsible for stopping the moving object.
The friction force is provided by nature in the form of air resistance, fluid resistance, Surface resistance.
For surface resistance, the friction force is of two types namely kinetic friction force and static friction force.
Static friction acts when the object is stationary and a force is applied to cause the motion while kinetic friction acts when the body starts moving.
kinetic friction is lesser is in magnitude as compared to static friction.
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
Answer:
200 miles
Explanation:
If the car is moving at 60 miles per hour, in order to find the distance covered in 3 h and 20 minutes, we convert the time in hours using thet 20 minutes = 20/60 hours = 1/3 of an hour
then the total time is : 3 + 1/3 hours = 10/3 hours.
We use the formula for distance as:
distance = velocity x time = 60 x 10/3 miles = 200 miles