Saturday

December 20, 2014

December 20, 2014

Posted by **urgent answer needed** on Saturday, June 15, 2013 at 4:43am.

Details and assumptions

You may take the acceleration of gravity as −9.8 m/s2.

You may neglect air resistance.

- physics -
**MathMate**, Saturday, June 15, 2013 at 7:29amAcceleration phase:

initial velocity, v0 = 0 m/s

final velocity, v1 = at = 8*20 = 160 m/s

distance, S = ut+(1/2)at² = 0 + (1/2)8(20²)

=(1/2)8(400)=1600 m

Free fall phase:

v0 = 160 m/s

acceleration,a = -9.8 m/s²

v0 = 160 m/s

v1 = 0

a = g =-9.8 m/s²

use

v1²-v0²=2aS

to solve for S, distance.

Add this to the 1600 m in the acceleration phase to get the maximum height.

**Answer this Question**

**Related Questions**

physic - A rocket accelerates straight up from rest for 20 seconds with an ...

Physics - A rocket is fired vertically with an upward acceleration of 30 m/s2. ...

Physics - A toy rocket is launched upwards from rest. The rocket engine will ...

physics - A rocket, initially at rest on the ground, accelerates straight upward...

physics - A rocket is launched straight up with a constant acceleration. Three ...

physics - A rocket is fired straight up and accelerates upward at 24 m/s2 for 12...

Physics - A rocket of mass 1.0x10^3kg is being fired to a height of 5.0 x 10^3 m...

physics - You have designed a rocket to be used to sample the local atmosphere ...

Physics - A test rocket is fired up from rest. The net acceleration is 20m/s^2 ...

Physics - A rocket is launched straight up with constant acceleration. Four ...