Recent content by Morgan89

I got It! 100 on my Final! Whooo Hooo! I love you all!

So if i say the frequency heard of the moving car is F of sound * (v/v-velocity of moving car) then i can just say that the difference between that value and the regular f of sound equals the 5.8 beat frequency right?

Two automobiles are equipped with the same single-frequency horn. When one is at rest and the other is moving toward an observer at 13 m/s, a beat frequency of 5.8 Hz is heard. What is the frequency the horns emit? Assume T = 20°C. I understand that this is related somehow to the doplar...

I think i figured it out! Distance and velocity are related in such a way that distance increases with the square of velocity. so if the velocity were to increase twice as much, then the distance would increase by 4 times. Therefore if my velocity increases by 3/4 the distance will increase...

Sorry i double posted, on my other post someone said that i had posted in the wrong section, and i was just trying to fix that. sorry. The final velocity is zero. I understand that. But for the car to come to a stop, there would have to be a negative deceleration due to friction maybe. I...

Thank you. that was the problem! Appreciate it!

In the high jump, the kinetic energy of an athlete is transformed into gravitational potential energy without the aid of a pole. With what minimum speed must the athlete leave the ground in order to lift his center of mass 1.55 m and cross the bar with a speed of 0.70 m/s I have tried...

If the speed of a car is increased by 75%, by what factor will its minimum braking distance be increased, assuming all else is the same I am not sure what formulas i should use for this problem. Am i souposed to use the formula for Final velocity which is Velocity Final^2=...

If the speed of a car is increased by 75%, by what factor will its minimum braking distance be increased, assuming all else is the same? Ignore the driver's reaction time I'm not sure how to start this problem. I am not sure what to do without any numbers to use in a formula. I do not know...