Recent content by helpme2012

Homework Statement You are driving your car and you heavily apply the brakes for a period of 2.1 seconds. The car keeps moving for a distance of 14.6m before it completely stops. What is the acceleration (in m/s2) experienced by the car? Is it truly "acceleration"?Homework Equations 5...

Hah, I got that before when playing around with Δdχ= VixΔt You're awesome, I'm an idiot lol. Thanks :)

24.99 degrees, rounded off to 25 degrees.

19.94m/s

I honestly have no idea what I'm doing on this question. I'm completely lost.

Help with projectile motion :( 1. Homework Statement A soccer ball is kicked from the roof of a 260m building. The ball is given an initial speed of 22m/s. It is airborne for a period of 8.3s and travels horizontally for 165.5m before hitting the ground. What is the angle ( in degrees) at...

7.66 seconds for the total flight from start to finish?

Hey guys, I found the displacement to be 71.75m. I used the equation suggested by Fifty and did this: d = vft - 1/2at2 71.75 = 0t - 1/2(-9.8)t2 71.75 = 4.9t2 I divided 4.92 from both sides so after I had this: 14.64 = t2 I took the square root of 14.64 and got 3.826s, rounded off to...

I'm just doubting myself right now haha, according to the book it's worth 4 marks so I figured maybe I was missing something.

Thanks for the reply, I appreciate being welcomed here. I'm really confused, I'm sorry but I honestly have no idea. I was thinking it would be another 3.83s to come back down but that can't be right..

Homework Statement A ball is launched vertically up from the ground. The initial speed of the ball is 37.5m/s. How long does it stay in the air?Homework Equations The 5 kinematic equationsThe Attempt at a Solution I figured the final speed would be 0m/s, and used the formula vf=vi+a*t so...