Calculate the pressure of water at the bottom of well if the depth of water is 10m (g=9.8 m/s
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Hi there!
Recall the equation for kinetic energy:
KE = Kinetic energy (J)
m = mass (kg)
v = velocity (m/s)
Plug in the given values:
Answer:
The tires make 125 revolutions before the car stops
Explanation:
Circular and Linear Motion
A tire rotates around a fixed point and the tire when in contact with the ground, drives a vehicle in a linear path. This is an example of a relationship between both types of movements that can be taking place simultaneously.
The car is moving with an initial speed of and then breaks at
until it stops. We can compute the time take to stop by using
Solving for t
Putting in numbers
Now, let's transfer this information to the circular motion. We know the tangent speed is
Being w the angular speed and r the radius of the circle, in this case, the tires. The tangent speed is the same as the speed of motion of the car. It gives us the initial angular speed
When the circular motion is not uniform, i.e. there is angular acceleration , the angular speed is a function of time
We can compute the angular acceleration knowing the final angular speed is zero when the car stops.
The rotation angle is also a function of time as shown
Using the given and computed values
Knowing each revolution is radians, the number of revolutions is
The tires make 125 revolutions before the car stops