Thursday

December 18, 2014

December 18, 2014

Posted by **monnie** on Wednesday, October 6, 2010 at 11:27pm.

- physics -
**Steven**, Thursday, October 7, 2010 at 12:29amKinematics Equations:

Vx1 = Vx0 + axΔt

(Vx1)^2 = (Vx0)^2 + 2axΔx

Δx = Vx0Δt + ½ ax(Δt^2)

Using the second kinematics equation, we can solve for Δx.

(Vx1)^2 = (Vx0)^2 + 2axΔx

Plug in what you know:

(45 m/s)^2 = (0 m/s) + 2(9.8m/s^2)(? m)

2025 m^2/s^2 = (19.6 m/s^2)(? m)

(? m) = (2025 m^2/s^2)/(19.6 m/s^2)

? m = 103.3163265

(sig figs) = 100 m

Δx = 100m

-----------------------------------

Using the first kinematics equation, we can solve for Δt.

Vx1 = Vx0 + axΔt

Plug in what you know:

Vx1 = Vx0 + axΔt

45 m/s = 0 m/s + (9.8 m/s^2)(Δt)

Δt = (45 m/s)/(9.8 m/s^2)

Δt = 4.591836735

(sig figs) =

Δt = 4.6 s

Let me know if that helped you!

- physics -
**monnie**, Thursday, October 7, 2010 at 12:53amyes it did help and i get it now thank you

- physics -
**maria**, Friday, February 4, 2011 at 3:35pmshouldn't acceleration be -9.8 and not +9.8 since it freefalling in the negative direction?

**Answer this Question**

**Related Questions**

physics - At a construction site a pipe wrench struck the ground with a speed of...

science - At a construction site a pipe wrench struck the ground wiht a speed of...

math - Throwing a Wrench. An angry construction worker throws his wrench ...

math - An angry construction worker throws his wrench downward from a height of ...

Physics - A PVC pipe that is one meter long is struck and the speed of sound is ...

Physics - A PVC pipe that is one meter long is struck and the speed of sound is ...

math - A construction company is laying natural gas Piping: pipeline. Several ...

physics - a pipe of length 1.00 m and open at both ends is lying on the ground ...

physics - A small pumpkin of mass 2.22 kg is dropped from rest from a height of ...

physics - two balls are dropped to the ground from different heights. one ball ...