Posted by **Kendra** on Tuesday, January 19, 2010 at 9:10pm.

The engine of a toy rocket supplies an average acceleration of 38.0 m/s/s to the rocket for an interval of 0.80 s. A.)If the toy roocket is launched vertically, how high does it rise in this interval? B.) How fast is the rocket moving at the end of 0.80 s? C.) What altitude does the rocket reach before falling back to Earth? D.) How long does it take the rocket to reach this altitude?

- physics -
**drwls**, Wednesday, January 20, 2010 at 7:41am
A) Solve Y = (a/2) T^2.

a is the acceleration and T is the 0.80 s rocket burn time.

B) Solve

V = a T, using the T = 0.8 s

V is the rocket velocity at 0.8 s.

C) Add Y (from part (A) ) and the additional distance that it rises after burnout, Y'.

After burnout, it continues to rise until (1/2) V^2 = g Y'.

Solve for the additiona altitude gain, Y'. The total altitude at that time is Y' + Y

D) 0.8 s PLUS the time it rises after burnout, T'.

g T' = V

T' = V/g

Total time rising = T + T'.

## Answer This Question

## Related Questions

- Physical - A toy rocket is launched vertically from ground level (y = 0 m), at ...
- Physics - A toy rocket is launched upwards from rest. The rocket engine will ...
- Physics - A test rocket is launched vertically from ground level (y=0m), at time...
- physics - A test rocket is launched vertically from ground level (y = 0 m), at ...
- Physics Help - A constant force of 100N , directed upward, is applied to a 5.0kg...
- physics - A toy rocket, launched from the ground, rises vertically with an ...
- Physics - A toy rocket, launched from the ground, rises vertically with an ...
- physics - A toy rocket, launched from the ground, rises vertically with an ...
- math - A toy rocket is launched straight up into the air with an initial ...
- intro to physics - a toy rocket moving vertically upward passes by a 2.2m- high ...

More Related Questions