Friday

January 30, 2015

January 30, 2015

Number of results: 65,575

**PHYSICS**

A 60.0 kg rocket accelerates upward from rest reaching a height of 23.4 m in 3.0 seconds. what is the thrust force produced by the engine?
*June 10, 2012 by yasmeen*

**Math**

The distance to the nearest 100000 km from Earth to the moon is given as 400000 km.The average speed to the nearest 500 km/h of a rocket to the moon is given as 3500 km/h.Calculate the greatest and least time it could take the rocket to reach the moon.
*March 30, 2012 by Friesam*

**Physics**

A car reaches a speed of 40m/s from rest in a time of 8 seconds. After teh 8 seconds, the car travels at a constant velocity fro 200meters when it runs out of gas. The car slowly comes to rest 30 seconds after running out of gas. Calculate acceleration for the first 8 seconds
*October 25, 2010 by Vivek *

**college algebra**

a rocket is fired upward from some initial distance above the ground. Its height in feet, h,above the ground, t seconds after it is fired, is given by h=-16t^2+32t+560.
*April 13, 2014 by Davone *

**Physics**

During the second stage of a rocket launch the rockets upward velocity increases from 980 m/s with an average acceleration of 33 m/s (upward). How long did the acceleration last?
*February 2, 2013 by Amanda*

**physics**

An aeroplane taking off from a field has a run of 500 meters. What is the acceleration and take off velocity if it leaves the ground 10 seconds after the start ?
*June 12, 2014 by Sanya*

**physics help!**

A car accelerates at a constant rate from zero to 32.6 m/s in 10 seconds and then slows to 14.8 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds...
*September 2, 2009 by Adam*

**Physics**

A car accelerates at a constant rate from zero to 36.8 m/s in 10 seconds and then slows to 13.9 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds? What was the acceleration during the first 10 seconds in the previous problem?
*July 8, 2010 by Me*

**Physics, Please help!!!**

A car accelerates at a constant rate from zero to 32.6 m/s in 10 seconds and then slows to 14.8 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds? What was the acceleration during the first 10 seconds in the previous problem?
*September 2, 2009 by Siri*

**physics**

When a rocket was launched and was 200 m above the ground traveling 125 m/s, a small package was released. How long does it take the package to reach the ground?
*February 20, 2013 by Anonymous*

**Physics**

A car accelerates at a constant rate from zero to 25.6 m/s in 10 seconds and then slows to 14.4 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds? What was the acceleration during the first 10 seconds?
*January 24, 2012 by Julie*

**physics**

A 750 kg rocket accelerates straight upward from the ground at 60 m/s2. What is the force (thrust) provided by the engine? with a gravitational pull of 10 m/s2 down
*February 3, 2014 by Troy*

**Advanced Maths (Vectors) AQA Level, please help?**

An object is moving in a plane. At time t =0,it is at origin O, and moving with velocity u. After 2 seconds, it is at A, where OA = -2i - 4j. After 3 seconds, it is at B, where AB= 10i -40 j. Show that this is consistent with constant acceleration a. Find a and u
*February 26, 2012 by Jat*

**Physics**

.) Beth launches a rocket out in the courtyard. It stays in the air for 7.25 seconds before coming back down. a.) How high did it get? b.) With what velocity did it hit the ground upon returning to Earth? c.) What is its rate of acceleration as it slows down, reaches the peak ...
*November 12, 2010 by Heidi*

**physics**

I need some help and I was wondering if you guys could give me some hints and stuff. thanks a lot!! Question 1 A force causes a certain acceleration. What acceleration would half of the original force cause? a. The same amount b. 1/2 times c. 4 times d. 2 times Question 2 How ...
*February 11, 2007 by Heath*

**Physics**

Take into account the Earth's rotational speed (1 rev/day) and use 5 significant figures. (a) Determine the necessary speed, with respect to Earth, for a rocket to escape if fired from the Earth at the equator in a direction eastward. (The escape velocity from the surface of ...
*February 26, 2014 by Anonymous*

**Physics**

In a lightning bolt, 16 C of charge flows in a time of 1.5 10-3 s. Assuming that the lightning bolt can be represented as a long, straight line of current, what is the magnitude of the magnetic field at a distance of 24 m from the bolt? please tell me where I am going wrong. B...
*September 28, 2007 by Mary*

**physics - linear momentum with rockets**

A rocket of total mass 3180 kg is traveling in outer space with a velocity of 115 m/s. To alter its course by 35.0 degrees, its rockets can be fired briefly in a direction perpendicular to its original motion. If the rocket gases are expelled at a speed of 1750 m/s, how much ...
*October 16, 2009 by clay*

**Scientific studies**

A toy air rocket is launched vertically with an initial velocity of 22m/s. (a) How long does it take to reach its maximum height (v=0m/s? (b) How long does it take to return to the ground (x-0m)?
*February 17, 2010 by Aly*

**physics**

The acceleration of a certain rocket is given by a=bt where b is positive cnstant, find the position function Xo and Vo at t=o?
*October 8, 2009 by sally*

**physics (mechanics)**

Practice problem: A rocket sled for testing equipment under large accelerations starts at rest and accelerates according to the expression: a= (2.8 m/s^3)t + (3.9 m/s^2) How far does the rocket move in the time interval t=0 to t=0.81 s? This is just a practice problem to help ...
*August 28, 2010 by John*

**physics**

A small rocket is fired directly upwards with an initial velocity of 100m/s, How many seconds will it take to reach its maximum height?
*February 29, 2012 by Natasha*

**science**

A small rocket is fired directly upwards with an initial velocity of 100m/s. How many seconds will it take to reach its maximum height?
*October 2, 2013 by madison*

**Physics**

A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly at a rate of 0.8 m/s2 for 4.4 seconds. It then continues at a constant speed for 13.5 seconds, before getting tired and slowing down with constant ...
*August 27, 2012 by David*

**physics**

Rocket-powered sleds are used to test the responses of humans to acceleration. Starting from rest, one sled can reach a speed of 444 m/s in 1.80 s and can be brought to a stop again in 2.15 s. (b) Find the acceleration of the sled as it is braking and compare it to the ...
*November 26, 2010 by javane*

**Physics**

A typical model rocket engine exerts an average force of 5 N on its exhaust gas. How much average thrust force does the gas exert on the engine and rocket?
*November 7, 2010 by Melissa*

**Math**

A model airplane is shot up from a platform 1 foot above the ground with an initial upward velocity of 56 feet per second. The height of the airplane above ground after t seconds is given by the equation h=-16t^+56t+1, where h is the height of the airplane in feet and t is the...
*July 24, 2014 by Ben*

**Physics**

What thrust does a 350 model rocket need in order to have a vertical acceleration of 14.0 on the Earth?
*February 21, 2011 by Mike aloe*

**physics**

Find the total force necessary to give a rocket of mass 25,000 slugs an acceleration of 28.0 ft/s2.
*September 30, 2014 by ben*

**physics**

A rocket is fired vertically up from the ground with a resultant vertical acceleration of (a) what is the maximum height reached? (b) After how much time from then will the maximum height be reached?(take g=10m/s2
*September 6, 2010 by sachin*

**Physics**

a 60 kg person falls off a 15 kg sled moving at 2 m/s. The person doesn't move after falling. Assuming no friction with the ice, and not other net forces acting on the sled, what is the change in velocity of the sled after the person falls off.
*December 16, 2010 by Sophie*

**physics**

A rocket is launched vertically from Earth's surface with a velocity of 3.4 km/s. How high does it go: From Earth's centre? From Earth's surface? how can this be done without any time or force mentioned ??
*May 9, 2012 by matin*

**physics**

During liftoff, a hot-air balloon accelerates upward at a rate of 3.3m/s^2. The balloonist drops an object over the side of the gondola when the speed is 15m/s. Part A: What is the magnitude of the object’s acceleration after it is released (relative to the ground)? Part B: ...
*September 5, 2013 by Anonymous*

**college physics**

A 915 kg two-stage rocket is traveling at a speed of 5.50×10^3 m/s with respect to Earth when a pre-designed explosion separates the rocket into two sections of equal mass that then move at a speed of 4.00×10^3 m/s relative to each other along the original line of motion. What...
*May 3, 2010 by peyton*

**math**

really need help, i have no idea how to answer this question ! A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds a) how high above the water is the cliff ( The maximum height ...
*May 16, 2011 by melissa*

**math**

really need help, i have no idea how to answer this question ! A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds a) how high above the water is the cliff ( The maximum height ...
*May 16, 2011 by melissa*

**Physics**

A simple pendulum suspended in a rocket ship has a period To. Assume that the rocket ship is near the earth in a uniform gravitational field. Determine for each of the following statements whether it is correct or incorrect. If the length of the pendulum is doubled, the new ...
*May 4, 2011 by Joan*

**physics**

A 9.3 kg firework is launched straight up and at its maximum height 45 m it explodes into three parts. Part A (0.5 kg) moves straight down and lands 0.29 seconds after the explosion. Part B (1 kg) moves horizontally to the right and lands 10 meters from Part A. Part C moves to...
*December 21, 2008 by seth*

**Tulane Physics**

a rock is thrown unward off a cliff at a 45 degree angle. THe rock falls back to the elevation it was thrown from after 3.56 seconds. It hits the water 5.31 seconds after it was thrown. How high is the cliff? what is the horizontal distance from the cliff to the point in the ...
*September 14, 2011 by laura*

**physical**

A car starts from rest its acceleration is 2m.s-2 in a straight line. What is it displacement after 10 seconds?
*February 4, 2011 by Zinhle*

**Physics-Intro**

Find the total force necessary to give a rocket of mass 25,000 slugs an acceleration of 28.0 ft/s2.
*September 30, 2014 by Dan*

**physics**

A space shuttle is launched from rest. It takes 8.00s to reach 165km/h , and at the end of the first 1.00 min its speed is 1650km/h . a) what is the avg. acceleration in (m/s2) during the first 8.00 seconds? b) what is the avg. acceleration in (m/s2) between the 8.00 seconds ...
*October 13, 2010 by V*

**Algebra**

A shingle falls straight down from the roof of a building that is 144 feet tall. a. Use a vertical motion model to write an equation that gives the height h of the shingle t seconds after it falls. b. When does the shingle hit the ground? c. If the same shingle were dropped ...
*April 18, 2013 by David*

**physics**

A model rocket leaves the ground, heading straight up at 47 m/s. (a) What is its maximum altitude? m What are its speed and altitude at each of the following times? (b) 1 s m/s m (c) 4 s m/s m (d) 8 s m/s m
*January 16, 2011 by Jen*

**AP Physics**

Could you please help me out with the following problems please? If a rocket initially at rest accelerates at a rate of 50 m/s^2 for one minute, its speed will be ? ( I know there are 60 seconds in 1 minute, so would I just use the formula, d=vt, and I would get 3000 m/s) It ...
*September 4, 2007 by Cheyanne*

**math help please !!!**

i really neeed help, i have no idea how to answer this question ! i tried everything i know! A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds a) how high above the water is ...
*May 17, 2011 by melissa*

**MATH**

A projectile is launched vertically upward from the top of a 240-foot building. This translate to the model y = -16t^2 + 32t + 240 where y is the height in feet and t is the time in seconds after it was launched. When will he projectile hit the ground? would i divide both ...
*September 27, 2008 by jennifer*

**math**

A projectile is launched vertically upward from the top of a 240-foot building. This translate to the model y = -16t^2 + 32t + 240 where y is the height in feet and t is the time in seconds after it was launched. When will he projectile hit the ground? would i divide both ...
*September 27, 2008 by Anonymous*

**MATH**

The function s(t) = 16t^2 models the distance, s(t), in feet, that an object falls in t seconds. Find the number of seconds a sky diver is in free fall after jumping from a plane if she falls 192 feet before opening a parachute. Express your answer in simplified radical form.
*March 30, 2010 by KE KE *

**calculus**

A rocket rises vertically from a point on the ground that is 100m from an observer at ground level. The observer notes that the angle of elevation is increasing at a rate of 12∘per second when the angle of elevation is 60∘. Find the speed of the rocket at that ...
*September 29, 2010 by ibo*

**graphing**

im not sure how to do this question A student fires a model rocket into the air. The rocket reaches a maximum hieght of 24.8 meters and lands 55 meters from the student. (assume parabola and no wind) a. list three points of trajectory(coordinate pairs) b. determine the ...
*February 22, 2013 by Anonymous*

**Physics**

1. Carlos jogs in a straight line at a constant speed of 1.5 m/s. He passes by Victoria, who, 10 seconds after Carlos had passed her, starts accelerating at a constant rate of 0.50 m/s^2 a) How much time after the passing of Carlos does it take Victoria to catch up to him? b) ...
*October 17, 2011 by Raf*

**Physicss**

1. Carlos jogs in a straight line at a constant speed of 1.5 m/s. He passes by Victoria, who, 10 seconds after Carlos had passed her, starts accelerating at a constant rate of 0.50 m/s^2 a) How much time after the passing of Carlos does it take Victoria to catch up to him? b) ...
*October 18, 2011 by Raf*

**math**

i really need help, i have no idea how to answer this question ! A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds a) how high above the water is the cliff ( The maximum height ...
*May 15, 2011 by melissa*

**math**

the distance, d, an object falls when dropped from a tower varies directly as the square of the time it falls. If the object falls 144 feet in 3 seconds, how far will it fall in 11 seconds?
*January 4, 2011 by Jared*

**Physics**

How fast does a rocket need to be going to break free of Earth's gravity? How fast would it have to be going in order to completely leave the solar system? (For the second part of this problem, assume that the Sun is the only mass in the solar system and that the rocket is ...
*September 29, 2011 by Kaitlyn*

**Physics**

How fast does a rocket need to be going to break free of Earth's gravity? How fast would it have to be going in order to completely leave the solar system? (For the second part of this problem, assume that the Sun is the only mass in the solar system and that the rocket is ...
*September 30, 2011 by Kaitlyn*

**physics**

find the effective weight of an astronuat ordinarily weighing 50kg when his rocket moves vertically upwards with 6gm acceleration
*November 26, 2011 by biniya*

**physics**

How much thrust is required to launch a 5 kg bottle rocket with an upward acceleration of 6.4 m/s2? I've gotten 32 because F=MA but I don't understand how to account for gravity. Please help!
*December 30, 2014 by mack*

**Physics**

A 6100 kg rocket is set for vertical firing from the ground. If the exhaust speed is 1200 m/s how much gas must be ejected each second if the thrust a) is to equal the magnitude of the gravitaiotnal force on the rocker and b) is to give the rocket an inital upward acceleration...
*February 9, 2007 by sarah*

**physics**

1. What did Newton conclude about the force that pulls apples to the ground and the force that holds the moon in orbit? 2. What does the very small value of the gravitational constant G (in standard units) tell us about the strength of gravitational forces? 3. We can think of ...
*July 13, 2010 by confused*

**Calculus**

The gravitational force, F, on a rocket at a distance, r, from the center of the earth is given by F=k/r^2 where k = 10^13 newton • km2. When the rocket is 10^4 km from the center of the earth, it is moving away at 0.2 km/sec. How fast is the gravitational force changing at ...
*November 9, 2008 by George*

**Physics help--explosion**

Figure 9-56 shows a two-ended "rocket" that is initially stationary on a frictionless floor, with its center at the origin of an x axis. The rocket consists of a central block C (of mass M = 6.00 kg) and blocks L and R (each of mass m = 2.90 kg) on the left and right sides. ...
*December 2, 2006 by fizzix*

**Hard Calculus**

The gravitational force, F, on a rocket at a distance, r, from the center of the earth is given by F=k/r^2 where k = 10^13 newton • km2. When the rocket is 10^4 km from the center of the earth, it is moving away at 0.2 km/sec. How fast is the gravitational force changing at ...
*November 9, 2008 by George*

**AP Physics Word Problems ASAP!**

Could you please help me out with the following problems please? If a rocket initially at rest accelerates at a rate of 50 m/s^2 for one minute, its speed will be ? ( I know there are 60 seconds in 1 minute, so would I just use the formula, d=vt, and I would get 3000 m/s) It ...
*September 5, 2007 by Cheyanne*

**physics**

Rocket-powered sleds are used to test the responses of humans to acceleration. Starting from rest, one sled can reach a speed of 444 m/s in 1.80 s and can be brought to a stop again in 2.15 s. (a) Calculate the acceleration of the sled when starting, and compare it to the ...
*September 21, 2010 by Anonymous*

**Physics**

A 400 kg rocket sled can be accelerated at a constant rate from rest to 1600 km/h in 2.0 s. What is the magnitude of the required net force?
*October 8, 2010 by Joseph*

**physics**

A projectile is launched straight upwards at 45 m/s. Three seconds later, its velocity is A. 75 m/s B. 30 m/s C. 15 m/s D. zero
*November 28, 2010 by Tracey*

**Physics**

Rocket-powered sleds are been used to test the responses of humans to acceleration. Starting from rest, one sled can reach a speed of 424 m/s in 2.35 s and can be brought to a stop again in 2.16 s. Find the acceleration of the sled while accelerating. Answer in units of m/s2
*September 4, 2012 by tgarci10*

**physics**

Rocket-powered sleds are been used to test the responses of humans to acceleration. Starting from rest, one sled can reach a speed of 533 m/s in 2.45 s and can be brought to a stop again in 2.37 s. Find the acceleration of the sled while accelerating. Answer in units of m/s2
*September 13, 2012 by Bri*

**Science Struggle**

Rocket-powered sleds are been used to test the responses of humans to acceleration. Starting from rest, one sled can reach a speed of 533 m/s in 2.45 s and can be brought to a stop again in 2.37 s. Find the acceleration of the sled when braking. Answer in units of m/s^2
*September 13, 2012 by Bri*

**physics**

When a 1150 kg space rocket lifts off of ground. How many joules of energy has been provided by its engine during the time in which it achieves a speed of 180 m/s.
*February 7, 2012 by Zach *

**Physics**

A Jet has a liftoff speed of 160 km/hr. What minimum uniform acceleration does this require if the aircraft is to be airborne after a takeoff run of 300m?
*February 5, 2011 by Apryl*

**physics**

A car accelerates at a constant rate from zero to 25.9 m/s in 7.6 seconds and then slows to 15.4 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the entire time?What was the acceleration during the first acceleration period?
*May 22, 2013 by giggles24*

**Physics (Circular Motion!!)**

Astronauts use a centrifuge to simulate the acceleration of a rocket launch. The centrifuge takes 30.0 s to speed up from rest to its top speed of 1 rotation every 1.10 s. the astronaut is strapped into a seat 7.40 m from the axis. A) What is the astronaut's tangential ...
*September 2, 2010 by George*

**Physics**

Astronauts use a centrifuge to simulate the acceleration of a rocket launch. The centrifuge takes 40.0s to speed up from rest to its top speed of 1 rotation every 1.40s . The astronaut is strapped into a seat 4.50m from the axis. What is the astronaut's tangential acceleration...
*February 7, 2011 by Fred*

**physics**

An aircraft on its take-off run has a steady acceleration of 3.0 m/s2. It's velocity after 10 seconds will be
*July 31, 2014 by HELP ASAP*

**physics**

A hare is resting behind a rock, when he suddenly sees a tortoise cruising by at a constant 4.0m/s. The hare, literally at rest initially, decides he must catch up with the tortoise, to save face. So, he accelerates uniformly to 6.0m/s in 4.0 seconds. Once he reaches 6.0m/s, ...
*September 17, 2010 by Kyle*

**science-reasoning**

in 5 seconds, a car moving in a straight line increases it's speed from 50km/h to 65km/h, while a truck goes from rest to 15km/h in a straight line. which undergoes greater acceleration? what is the acceleration of each vehicle?
*October 20, 2007 by Drew*

**Physics**

Suppose you wish to visit a star which is 450 light years away, and that you want your 21000 kg rocket to move so fast that you only age 20 years during the round trip. a. How fast must the rocket travel relative to the Earth? Give your answer as the fraction of the speed of ...
*May 5, 2011 by Darren*

**Physics**

Astrotrain, a Decepicon triple changer, is traveling at a speed of .77c towards Earth, as seen by Blaster, who is on Earth inside Fortress Maximus. Astrotrain's computers tell him the icon rocket was fired at .35c. Determine the length of the ion rocket as seen by Blaster and ...
*May 6, 2009 by Anonymous*

**Related rates**

Hey, I have a question on related rates and I'm a little rusty at them. I have an idea how to do this one but at a certian point i get stuck. The question is: Two cars leave the intersection, the first travelling south at 40 km/hr and another travelling west at 90 km/hr. How ...
*November 2, 2006 by Tracy*

**physics**

A rocket moves upward, starting from rest with an acceleration of 28.8 m/s2 for 4.13 s. It runs out of fuel at the end of the 4.13 s but does not stop. How high does it rise above the ground?
*December 5, 2010 by Anonymous*

**Physics**

A rocket moves upward, starting from rest with an acceleration of 35.0 m/s2 for 5.63 s. It runs out of fuel at the end of the 5.63 s but does not stop. How high does it rise above the ground?
*December 13, 2010 by Monty*

**Physics**

A rocket moves upward, starting from rest with an acceleration of 35.0 m/s2 for 5.63 s. It runs out of fuel at the end of the 5.63 s but does not stop. How high does it rise above the ground?
*December 13, 2010 by Monty*

**Physics**

A rocket moves upward, starting from rest with an acceleration of 35.0 m/s2 for 5.63 s. It runs out of fuel at the end of the 5.63 s but does not stop. How high does it rise above the ground?
*December 13, 2010 by Monty*

**Physics**

A rocket moves upward, starting from rest with an acceleration of 35.0 m/s2 for 5.63 s. It runs out of fuel at the end of the 5.63 s but does not stop. How high does it rise above the ground?
*December 13, 2010 by Monty*

**physics**

A rocket moves upward, starting from rest with an acceleration of 32.0 m/s2 for 3.27 s. It runs out of fuel at the end of the 3.27 s but does not stop. How high does it rise above the ground?
*October 11, 2012 by Apple*

**physics**

A rocket moves upward, starting from rest with an acceleration of 30.5 m/s2 for 3.39 s. It runs out of fuel at the end of the 3.39 s but does not stop. How high does it rise above the ground?
*March 14, 2013 by John Miller*

**Physics**

A rocket moves upward, starting from rest with an acceleration of 28.1 m/s2 for 5.21 s. It runs out of fuel at the end of the 5.21 s, but does not stop. How high does it rise above the ground?
*October 5, 2013 by BOB*

**physics**

A rocket moves upward, starting from rest with an acceleration of 28.1 m/s2 for 4.76 s. It runs out of fuel at the end of the 4.76 s but does not stop. How high does it rise above the ground?
*October 16, 2013 by eve*

**physics**

A rocket moves upward, starting from rest with an acceleration of 29.4 m/s2 for 5.65 s. It runs out of fuel at the end of the 5.65 s but does not stop. How high does it rise above the ground?
*October 17, 2013 by Nicole*

**Physics**

A rocket moves upward, starting from rest with an acceleration of 28.4 m/s2 for 4.79 s. It runs out of fuel at the end of the 4.79 s but does not stop. How high does it rise above the ground?
*October 27, 2013 by Josselyne*

**Physics**

A rocket moves upward, starting from rest with an acceleration of 28.4 m/s2 for 4.79 s. It runs out of fuel at the end of the 4.79 s but does not stop. How high does it rise above the ground?
*October 27, 2013 by Josselyne*

**physics**

A rocket moves upward, starting from rest with an acceleration of 26.3 m/s2 for 3.91 s. It runs out of fuel at the end of the 3.91 s but does not stop. How high does it rise above the ground?
*February 12, 2014 by ashley*

**Science- Physics Problem**

I dont know if im doing these problems right, please help... A car accelerates at a constant rate from zero to 32.6 m/s in 10 seconds and then slows to 14.8 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds --would you do ...
*September 2, 2009 by Leslie*

**Math**

A satellite will be released into an orbit of more than 400 miles above the earth. the rocket is carrying it is currently 255 miles above earth write and solve an inequality to show how much higher the rocket must climb before it releases the satellite 255+m>400 m>145
*September 23, 2014 by Coleson*

**Physics**

Beatrice throws the 1st calculator straight up from the edge of the roof of a building. She drops a 2nd calculator off the side of the building 2 seconds after she has thrown the first one. If the height of the building is 40m, what must the initial upwards velocity of the 1st...
*November 12, 2010 by Heidi*

**physics**

A record of travel along a straight path is as follows: 1. Start from rest with constant acceleration of 2.59 m/s2 for 19.0 s. 2. Maintain a constant velocity for the next 2.15 min. 3. Apply a constant negative acceleration of −9.08 m/s2 for 5.42 s. (a) What was the ...
*September 10, 2014 by Armando*

**Physics**

A rocket blasts off from rest and attains a speed of 42.2 m/s in 10.9 s. An astronaut has a mass of 63.8 kg. What is the astronaut's apparent weight during takeoff?
*December 12, 2012 by shine*

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