Physics - October 2006

A rocket engine can accelerate a rocket launched from rest vertically up with an acceleration of 20.0 m/s^2. however after 50.0s of flight the engine fails. g= 9.80 n/kg

what is the rockets' altitude when the engine fails?
when does it reach its maximum height?
what is the maximum height reached?
what is the velocity of the rocket just before it hits the ground?


What are the formulas' that I use to find these answers?

2006-10-03 15:28:35 · 3 answers · asked by Trevor M 1

distinguish between force and pressure?

2006-10-03 15:19:49 · 8 answers · asked by foxy lady 2

When you drop a 0.40 kg apple earth exerts a force on it that accelerates it at 9.8 m/s squared toward the earth. If the mass of the Earth is 5.98 times 10 to the 24th power, what is the magnitude of the earths acceleration.

2006-10-03 15:08:20 · 4 answers · asked by mike j 1

How do I work this problem?

A cup of coffee is sitting on a table in an airplane that is flying at a constant altitude and a constant velocity. The coefficient of static friction between the cup and the table is 0.28. Suddenly, the plane accelerates, its altitude remaining constant. What is the maximum acceleration that the plane can have without the cup sliding backward on the table?

Can you please help me with this?

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I've asked this question earlier and still haven't gotten an answer. I've been told how to do it but it's still confusing me b/c I have no idea what the ans is.

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 3.60 m. Two of the spheres have a mass of 4.50 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that the spheres exert on each other, what is the magnitude of the initial acceleration of the third sphere?

2006-10-03 15:04:41 · 3 answers · asked by blah 1

i wold play football inside

2006-10-03 14:48:35 · 13 answers · asked by Anonymous

2006-10-03 14:41:23 · 4 answers · asked by jaff_erin 1

2006-10-03 14:39:06 · 6 answers · asked by jack_sparrow1986 1

mathematically, what is the relationship?

2006-10-03 14:33:23 · 9 answers · asked by jack_sparrow1986 1

what is the effect of friction on a moving object?

2006-10-03 14:27:20 · 5 answers · asked by foxy lady 2

may i have the sequence of the gases

2006-10-03 14:04:34 · 3 answers · asked by LOTS OF QS 1

I know Newton's 2nd law Fnet=ma, and yet I have no idea how to prove this, I think the question is asking for some invented math problem, and this troubles me greatly.

2006-10-03 13:50:48 · 7 answers · asked by Mira Bella 3

During a throw, a baseball pitcher exerts a force of 3.20 m before releasing it. If the 0.12-kg ball leaves the pitcher's hand with a speed of 35.0 m/s, how much of a force did the pitcher exert on the ball?

2006-10-03 12:59:23 · 2 answers · asked by Bao Wow 3

In a game of shuffleboard, a disk with an initial speed of 3.2 m/s travels 6.0 m before coming to rest. (a) What was the magnitude of the average acceleration of the disk? (b) What was the coefficient of kinetic friction acting on the disk?

2006-10-03 12:55:26 · 3 answers · asked by Anonymous

2006-10-03 12:36:59 · 6 answers · asked by girlwiththegoodies 3

Please don't respond for the sake of points. When people who don't know anything about the question answer, other people will think the question is resolved.

The drawing shows a large cube (mass = 38 kg) being accelerated across a horizontal frictionless surface by a horizontal force P. A small cube (mass = 2.7 kg) is in contact with the front surface of the large cube and will slide downward unless P is sufficiently large. The coefficient of static friction between the cubes is 0.71. What is the smallest magnitude that P can have in order to keep the small cube from sliding downward?

Here is the picture http://i21.photobucket.com/albums/b272/Cajunboiler/Physics_.gif

How do I work this? What is the answer?

2006-10-03 12:01:14 · 7 answers · asked by blah 1

2006-10-03 12:00:05 · 2 answers · asked by wewell68 1

2006-10-03 11:49:48 · 15 answers · asked by lynn 1

A rifle is aimed horizontally at a target 50.0 away. The bullet hits the target 2.70 below the aim point

what was the flight time in sec
and what was the velocity when it hit (m/s)

2006-10-03 11:18:22 · 5 answers · asked by jack_sparrow1986 1

2006-10-03 11:15:06 · 7 answers · asked by Anonymous

2006-10-03 11:12:11 · 4 answers · asked by Anonymous

we got this question in physics and i was wondering if you could explain to me how to do it. i started(work below) but not sure if i'm doing it right.

A 438kg car is accelerating at 2.55 m/s^2. if the coefficient of friction felt by the car is .0500, what is the total force acting east on the car? (hint: 4 calculations needed)

1st i did F=ma
438kg*2.55m/s^2 and got 1120 N

then i did Fsubf=uFsubn
.0500*1120N=56N

then i did 1120N -56 N=1064N
i thought this was the net force. but it says i need 4 calculations and i only have 4.

Could you explain what i'm doing wrong?

Thank you so much

2006-10-03 11:06:42 · 2 answers · asked by Anonymous

if u throw a frozen bean of the empire state building how fast would it b going when it hits the deck

2006-10-03 11:06:10 · 8 answers · asked by simon s 1

how much electricity do i need to supply a 10 bedroom house?

2006-10-03 10:38:07 · 3 answers · asked by kizito k 1

that the cord makes a constant angle of 37degrees with the vertical. Find (a) the push magnitude and (b) the tension in the cord.

2006-10-03 10:34:35 · 1 answers · asked by gods1princesschanel 1

2006-10-03 10:24:37 · 6 answers · asked by bigbrian 1

in newtons

2006-10-03 10:13:24 · 3 answers · asked by ckielblock18 1

Thanks in advance if someone can help. At first I thought it was 5 seconds, but I am not sure. I dont think I understand the concept of acceleration completely.

2006-10-03 09:44:03 · 3 answers · asked by Jer G 3

2006-10-03 09:37:58 · 11 answers · asked by Shawn J 2

2006-10-03 09:27:45 · 11 answers · asked by greenwillowtrie 3

2006-10-03 09:23:55 · 21 answers · asked by www.mybodyandsoles.co.uk 1