Recent content by afa

i still come up with the same equation that doesn't work ?

A 280000-kg wood block is firmly attached to a very light horizontal spring, as shown in the figure . The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the spring .18m . If the spring is released from this position, how far beyond its...

Homework Statement Leaves the ground at a 33.6 degree angle and travels at 7.77 m. What is take off speed? If speed were increased by 4% how much longer would the jump be? Homework Equations Vx=Vcos(theta) The Attempt at a Solution 7.77=vcos33.6 got 9.33 but says it wrong...

Homework Statement A rocket rises vertically, from rest, with an acceleration of 4.0 until it runs out of fuel at an altitude of 1500 . After this point, its acceleration is that of gravity, downward. How long does it take to reach this point? What maximum altitude does the rocket...

I don't understand, what are you doing with the second equation?? can you go through the steps?

thank you so much, you seem to be the most helpful, do you think you could help me out on some more?

Homework Statement A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.7s later. If the speed of sound is 340m.s how high is cliff? Homework Equations Ttotal=trock+tsound distance=Vsound*tsound ts=340m/s-trock x=x+vt+.5at^2 quadratic equation...

Homework Statement determine the stopping distance for a car with an intitial speed of 26.9 m/s and a human reaction time of 0.9s for an acceleration of -4m/s^2 Homework Equations x=vt t=v/a x=x+vt+.5at^2 The Attempt at a Solution I used the second equation to find total...