Friday

April 29, 2016
Number of results: 33,832

**physics**

The average velocity for a trip has a positive value. Is it possible for the instantaneous velocity at any point during the trip to have a negative value? (I'm thinking yes because derivatives can be negative but I'm not sure). also A ball is dropped from rest from the top of ...
*January 2, 2009 by Anonymous*

**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*

**Physics**

Babe Didrikson holds the world record for the longest baseball throw (296 ft) by a woman. For the following questions, assume that a ball is thrown at an angle of 45.0° above the horizontal, that it travels a horizontal distance of 280 ft, and is caught at the same level from ...
*December 8, 2009 by Robert C*

**Physics**

A 72.0-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.80 m/s2, N (b) moving upward at a constant speed, and N (c) accelerating downward with an acceleration of 1.30 m/s2? N I just ...
*September 17, 2007 by NHS*

**Physics**

Chapter 4, Problem 36 Incorrect. A 77.2-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.66 m/s2, (b) moving upward at a constant speed, and (c) accelerating downward with an ...
*December 12, 2012 by shine*

**physics**

A 124- balloon carrying a 22- basket is descending with a constant downward velocity of 27.4 A 1.0- stone is thrown from the basket with an initial velocity of 20.0 perpendicular to the path of the descending balloon, as measured relative to a person at rest in the basket. The...
*April 1, 2012 by salem*

**physics**

A tennis ball is hit vertically upward and returns 6 sec later calculate. A) the greatest height reached by the ball. B) the initial velocity of the ball .
*October 2, 2011 by Anonymous*

**Physics**

A 97.0-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.70 m/s2, (b) moving upward at a constant speed, and (c) accelerating downward with an acceleration of 1.80 m/s2?
*February 18, 2008 by Zach*

**Physics**

74.0-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.10 m/s2, (b) moving upward at a constant speed, and (c) accelerating downward with an acceleration of 1.00 m/s2?
*September 8, 2008 by Lisa*

**physics**

A 84.5-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.93 m/s 2, (b) moving upward at a constant speed, and (c) accelerating downward with an acceleration of 1.57 m/s2?
*June 9, 2012 by Anonymous*

**Physics**

A 96.6-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.79 m/s2, (b) moving upward at a constant speed, and (c) accelerating downward with an acceleration of 1.14 m/s2?
*November 13, 2012 by Tim*

**physics**

A 72.2-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.53 m/s2, (b) moving upward at a constant speed, and (c) accelerating downward with an acceleration of 1.44 m/s2?
*August 12, 2015 by ben*

**physics**

A ball is thrown vertically into the air and when it returns after an interval of 2 seconds it is caught. What is the acceleration of the ball after leaving the hand? I have no idea how to solve this!
*September 27, 2009 by Jake*

**Physics**

Starting from rest, a 1.7x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.44 N on it. This force does 2.4x10-4 J of work on the flea. (a) What is the flea's speed when it leaves the ground? (b...
*September 21, 2011 by Hannah*

**physics **

Starting from rest, a 2.1x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.37 N on it. This force does 1.5x10-4 J of work on the flea. (a) What is the flea's speed when it leaves the ground? (b...
*March 11, 2014 by Anonymous*

**Physics**

Starting from rest, a 2.4x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.42 N on it. This force does 1.5x10-4 J of work on the flea. (a) What is the flea's speed when it leaves the ground? (b...
*August 27, 2015 by Kate*

**physics**

Starting from rest, a 2.4x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.42 N on it. This force does 1.5x10-4 J of work on the flea. (a) What is the flea's speed when it leaves the ground? (b...
*August 28, 2015 by archer*

**Physics**

2.0 kg rock in a 0.80 ling sting is swung vertically in circles. a) What does the speed of the rock to be so the string holds tight? b) what is the pulling force if the speed is 5.0 m/s?
*May 19, 2014 by Physics: Motion?*

**Physics**

A ball is thrown horizontally from a height of 16.01 m and hits the ground with a speed that is 5.0 times its initial speed. What was the initial speed? This question really boggles my brain. I have no idea how to solve this, given only the height. Could someone please steer ...
*November 4, 2007 by Lindsay*

**Physics**

Can someone help me find Delta Time for the first 150 meters of this question. Everytime I try and get it by using the quadratic formula I get two negative numbers which I don't think is right. A model rocket is launched straight upward with an initial speed of 50.0m/s. It ...
*September 28, 2007 by Dustin*

**PHYSICS**

Two parallel METAL rods form a plane inclined at 20.0° to the horizontal. The upper end of the rods are connected together by a resistor of 118.0 Ω. The lower end of the rods are held in an ELECTRICALLY INSULATING block. They are separated horizontally by a distance of 20...
*November 29, 2014 by Khuan*

**physics**

An object moving with constant acceleration at time t=0 its speed is v. , at t=t. its speed is v./2 , at t=2t. its speed is v./4 . What will be its speed at time t=3t.?
*July 26, 2011 by Tillu*

**Please Help!!!!!!**

a hot air balloon is rising vertically 10 ft/sec while the wind is blowing horizontally 5ft/sec. Find the speed of the balloon and the angle x that it makes with the horizontal. I know that the speed of the balloon is the square root of (10)^2 + (5)^2, but I was wondering if ...
*November 10, 2011 by Ashley*

**phy**

A ball is thrown from the window of a high-rise building with an initial velocity of 6.1 m/s at an angle of 32 deg. below the horizontal. The bill strikes the ground 4.4 seconds after being thrown. Find the height from which the ball was thrown.
*October 6, 2010 by Anonymous*

**physical**

A ball is thrown from the window of a high-rise building with an initial velocity of 7.7 m/s at an angle of 34 deg. below the horizontal. The bill strikes the ground 4.2 seconds after being thrown. Find the height from which the ball was thrown.
*October 15, 2011 by Anonymous*

**physics**

Which of the following situations describes inertia? a. A stationary object tends to resist being moved. b. A moving object tends to resist a change in speed. c. A moing object tends to resist a change in direction d. all of the above
*February 6, 2013 by Carolyn*

**Physics**

A roller-coaster car has a mass of 1170 kg when fully loaded with passengers. As the car passes over the top of a circular hill of radius 16 m, its speed is not changing. (a) What are the magnitude and direction of the force of the track on the car at the top of the hill if ...
*October 28, 2009 by joann*

**science**

a man of mass 80kg standing on a stationary frictionless trolley of mass 60kg has in his hands a parcel of mass 10 kg.He throws the parcel horizontally from the rear of the trolley at 4 m.s-1 in relation to the ground. 2.1 what is the total momentum of the system before the ...
*February 9, 2010 by Anonymous*

**Physics HELP!**

a rock is thrown vertically upwards with an initial velocity of 30 m/s. Neglecting air resistance, calculate a) the maximum height reached b) the time taken to reach maximum height PLEASE help with this
*October 7, 2006 by veronica*

**physics**

Stone dropped from top of a tower 100m high. At same instant another stone is thrown vertically from base of the tower with a velocity of 25m/s. When and where will the two stones meet? Given g =10 m/s^2
*February 13, 2015 by Anonymous*

**physics**

Stone dropped from top of a tower 100m high. At same instant another stone is thrown vertically from base of the tower with a velocity of 25m/s. When and where will the two stones meet? Given g =10 m/s^2
*February 13, 2015 by Nikhil*

**Terminal Velocity**

How can u determine that a falling object has reached terminal velocity from a velocity time graph of its motion? u can determine if a falling object has reached terminal velocity from a velocity-time graph of its motion by its stop of acceleration. The falling object no ...
*November 30, 2010 by Teya*

**True & False explanations Physics **

When a projectile is fired at 45 deg. angle and is in free fall, the only point along the path that the acceleration of the object is zero is the instant when the object is at the highest point of its path. Answer: False Can someone explain how? 2.) An object with acceleration...
*February 3, 2016 by Emma*

**Physics**

From the top of a cliff with 80 m height a stone is thrown vertically and finally hit the surface of ocean. Initial velocity of stone is 40 m/s. Find: (a) time to reach to max height. (b) how high goes from surface of ocean? (c) what is velocity of stone 2 second after thrown...
*August 27, 2014 by Lilian*

**Math, Please Help!!!**

a hot air balloon is rising vertically 10 ft/sec while the wind is blowing horizontally 5ft/sec. Find the speed of the balloon and the angle x that it makes with the horizontal. I know that the speed of the balloon is the square root of (10)^2 + (5)^2, but I was wondering if ...
*November 10, 2011 by Jenny Star*

**Math, Please Help!!!**

a hot air balloon is rising vertically 10 ft/sec while the wind is blowing horizontally 5ft/sec. Find the speed of the balloon and the angle x that it makes with the horizontal. I know that the speed of the balloon is the square root of (10)^2 + (5)^2, but I was wondering if ...
*November 10, 2011 by BOB*

**Physics**

Two massless springs (S1 and S2) are arranged such that one hangs vertically downward and the other is vertically upward, as shown in figure (a). When a 0.275-kg mass is suspended from S1, it stretches by an amount Δx1 = 0.062 m, as shown in figure (b). Spring S1 is now ...
*October 23, 2014 by Anonymous*

**phsical**

A ball is tossed vertically upward from a height of 2 m with an initial velocity of 10 m/s. Just before the ball hits the ground, its velocity will be what?
*August 12, 2011 by abu*

**Second law of motion**

A 25 N box is pulled vertically upward by means of a cord. Find the acceleration of the box if the tension in the cord is 35 N.
*August 19, 2014 by YESHA*

**Physics**

1. A man throws a body of mass 500gm with a velocity of 10m/s vertically upward on a planet he weight of the body on the planet.
*February 4, 2016 by paresh Ghosh*

**physics**

1. A man throws a body of mass 500gm with a velocity of 10m/s vertically upward on a planet he weight of the body on the planet.
*February 11, 2016 by paresh*

**Physics**

A 25 N box is pulled vertically upward by means of a cord.Find the acceleration of the box if the tension in the cord is 35 N.
*April 5, 2016 by Arcel*

**Physics**

A ball is thrown straight downward with a speed of 0.50 m/s from a height of 4.0 meters. What is the speed of the ball 0.70 seconds after it is released? GIVEN: Vi = 0.50 m/s Vf = ? d = 4 m t = 0.70 s
*February 2, 2010 by Priscilla*

**PHYYYYYSICS 9**

A baseball is thrown horizontally off a 43-m high cliff with a speed of 18.3 m/s. What will be the speed of the baseball in m/s just before it hits the ground?
*September 18, 2014 by Carissa*

**Physics**

If a ball is thrown at an initial speed of 8.0m/s at an angle of 35 degrees above the ground, what is the speed of the ball when it returns to its original height?
*September 13, 2015 by Jacob*

**Physics**

A spring loaded ballistic pendulum gun requires an increasing force to load. When loading a ball of mass 0.054 kg, the spring is compressed 7.00 cm, the gun is fully loaded, and the force required is 70.0 N. a) Calculate the work required to load the gun. b) Calculate the ...
*April 12, 2016 by Emily*

**Physics**

A 25.2-kg object is moving rightward across a horizontal surface with a speed of 14.3 m/s The coefficient of friction between the object and the surface is 0.490.
*January 10, 2013 by Steven*

**Physics**

An object is traveling at a constant speed of 12.0 m/s when it slows to a stop. If it takes 10.0 m for the object to stop, what is the magnitude of its acceleration?
*September 9, 2015 by Tyler*

**Physics**

An object is traveling at a constant speed of 12.0 m/s when it slows to a stop. If it takes 10.0 m for the object to stop, what is the magnitude of its acceleration?
*September 9, 2015 by Anonymous*

**Physics**

An object is traveling at a constant speed of 12.0 m/s when it slows to a stop. If it takes 10.0 m for the object to stop, what is the magnitude of its acceleration?
*November 11, 2015 by Anonymous*

**physics**

4. Let's say you're driving in your car, approaching a red light on the Camp Hill Bypass. A black Porsche is stopped at the light in the right lane, but there's no-one in the left lane, so you pull into the left lane. You're traveling at 40 km/hr, and when you're 15 meters ...
*December 20, 2015 by ANON.*

**physics**

A ball is thrown upwards and returns to the same position. Compared with its original speed after release, its speed when it returns is about
*September 16, 2011 by Anonymous*

**Physics**

order the acceleration from least to greatest. a) 30<-object ->50 b) 20<-object c) 20<-object->40 d) 10<-object->30 I think the answer is "dcba" but that isn't right
*November 29, 2015 by Jacob*

**physics**

45. Here the same stone is being accelerated vertically upward. a. Draw force vectors to some suitable scale showing relative forces acting on the stone. b. Which is the longer vector, and why?
*January 16, 2012 by RAYMOND*

**physics**

A stone is dropped from the top of a tower 400 m high and at the same time another stone is projected upward vertically from the ground with a velocity of 100 ms −1 . Find where and when the two stones will meet.
*September 12, 2015 by Deepa*

**physics**

When a .90 kg object is attached to a vertically supported spring, it stretches .15 m from the equilibrium position. Find k for the spring.
*February 20, 2012 by Andreas*

**Physics**

When a 0.50 kg-object is attached to a vertically supported spring, it stretches 0.10 m from the equilibrium position. Find k for the spring.
*February 22, 2012 by Noel*

**physics**

a stone is from the top of a tower 300m high and at the same time another stone is projected vertically upward with initial velocity 75m/s. calculate when and where the two stone meet
*April 21, 2011 by irna*

**physics**

a stone is from the top of a tower 300m high and at the same time another stone is projected vertically upward with initial velocity 75m/s. calculate when and where the two stone meet
*April 23, 2011 by irna*

**physics**

What will a spring scale read for the weight of a 50 kg woman in an elevator that moves as follows? (a) upward with constant speed of 3.0 m/s Enter a number.1 N (b) downward with constant speed of 3.0 m/s Enter a number.2 N (c) upward with acceleration of 0.35g Enter a number....
*December 18, 2009 by kim*

**physics**

For an interesting physics field trip, we visit Tahquamenon Falls in the Upper Peninsula. We measure the horizontal speed of the water at the top of the falls to be 3.98 m/s. How far vertically below the top edge of the falls does the velocity vector of the water point ...
*October 5, 2010 by Bansnoob*

**physics**

A person pushes a 17.0 kg lawn mower at constant speed with a force of 74.0 N directed along the handle, which is at an angle of è = 48.0° to the horizontal (b) Calculate the horizontal retarding force on the mower (c) Calculate the normal force exerted vertically upward on ...
*February 2, 2012 by kayla*

**physics**

A 67.5-kg basketball player jumps vertically and leaves the floor with a velocity of 1.66 m/s upward. (Take upward as positive and forward as positive.) (a) What impulse does the player experience? magnitude direction (up,down, back or zero) (b) What force does the floor exert...
*March 29, 2012 by sally*

**physics**

a stone is thrown in a vertically upwad direction with a velocity of 7m/s.if the acceleration of the stone during its motion is 12m/s in the downward direction what will be the height attained by the stone?
*July 29, 2012 by bhuvana*

**physics **

our objects are situated along the y axis as follows: a 1.94 kg object is at +3.27 m, a 2.76 kg object is at +2.18 m, a 2.78 kg object is at the origin, and a 3.99 kg object is at -0.360 m. Where is the center of gravity of this system?
*February 6, 2012 by Dan*

**Physics **

"A moving object has a kinetic energy of 145 J and a momentum with a magnitude of 40.0 kg·m/s. Determine the mass and speed of the object." I simply cannot figure it out. I know that KE=.5mv^2 and that p=mv but I can't seem to piece it together. Please explain?
*January 7, 2015 by Jane*

**physicsa 6a**

A charge of 28.0 is placed in a uniform electric field that is directed vertically upward and that has a magnitude of 4.00×104 . What work is done by the electric force when the charge moves
*May 18, 2010 by Sally*

**Maaaath**

a stone thrown upward from the top of a 320-foot cliff at 128 ft/sec eventually falls to the beach below? how long does the stone take to reach its highest point?
*June 13, 2013 by Rachel*

**Physics PLEASE HELP!**

A spring with an unstrained length of 0.076 m and a spring constant of 2.6 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring. A sphere with a mass of 5.09 10-3 kg and a net charge of +6.5...
*January 28, 2013 by Adriana*

**physics**

When will your apparent weight be greatest, as measured by a a scale in a moving elevator; when the elevators: (a) accel. downward (b) accel. upward (c) is in free fall (d) moves upward at a constant speed? In what case would you weight be the least? When would it be the same ...
*October 26, 2009 by Sasha*

**Physics**

A 76.6-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.94 m/s2, (b) moving upward at a constant speed, and (c) accelerating downward with an acceleration of 1.15 m/s2? I've already ...
*February 20, 2015 by Kaleem*

**Physics**

A 500.0 kg object is attached by a rope through a pulley to a paddle-wheel shaft that is placed in a well-insulated tank holding 25.0 kg of water. The object is allowed to fall, causing the paddle wheel to rotate, churning the water. If the object falls a vertical distance of ...
*February 5, 2014 by Carla*

**physics**

One end of a thin rod is attached to a pivot, about which it can rotate without friction. Air resistance is absent. The rod has a length of 0.48 m and is uniform. It is hanging vertically straight downward. The end of the rod nearest the floor is given a linear speed v0, so ...
*April 12, 2016 by reghuir*

**physics**

a ball is thrown at an initial angle of 37 and initial velocity of 23.0 m/s reaches a maximum height h, as shown in the Figure. With what initial speed must a ball be thrown straight up to reach the same maximum height h?
*January 3, 2011 by Anonymous*

**Excel VBA **

(I have no idea what to do I've asked our professor for help with this numerous times he refuses please help, I know how to make input boxes and a command button but that is it) (1) When an object is thrown into the air it exhibits what is called projectile motion. You will (...
*October 9, 2011 by Ebony*

**physics**

A person pushes a 14.0-kg lawn mower at constant speed with a force of F = 88.0 N directed along the handle, which is at an angle of 45.0º to the horizontal (Fig. 4–45). (a) Draw the free-body diagram showing all forces acting on the mower. Calculate (b) the horizontal ...
*January 19, 2011 by mrmr*

**physics**

A 2.9 kg object oscillates with simple harmonic motion on a spring of force constant 430.0 N/m. The maximum speed is 0.8 m/s. What is the total energy of the object and the spring?
*October 12, 2011 by Jay*

**Calculus**

An object moves from left to right along a parabolic shaped path y=(1/4)x^2. At the point (-2,1) the speed is 1. What normal acceleration is the object experiencing at that point?
*February 16, 2016 by Tony*

**calculus**

a ball is thrown upward at 96 feet per second from the top of a 100 foot building. 1.when will the ball obtain maximum height 2. when will the ball hit the ground?
*October 24, 2011 by chris*

**english**

Thank you for using the Jiskha Homework Help Forum. You can learn best with examples. 1. Object pronouns are used everywhere else (direct object, indirect object, object of the preposition). Object pronouns are me, you, him, her, it, us, and them. Examples Jean talked to him. ...
*April 5, 2007 by SraJMcGin*

**Physics -- check answers**

1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is? my answer: 320N 2. What is the kinetic energy of a 20 kg object moving at a speed of 10 m/s? my answer: 1000J 3. the gravitational potential energy of a bird ...
*February 23, 2014 by Lisa*

**Physics**

A projectile is fired at an upward angle of 25.0^\circ from the top of a 310 m cliff with a speed of 220 m/s. What will be its speed when it strikes the ground below? (Use conservation of energy.)
*November 15, 2010 by Linda*

**physics**

Snow is falling vertically at a constant speed of 6.6 m/s. At what angle from the vertical do the snowflakes appear to be falling as viewed by the driver of a car traveling on a straight, level road with a speed of 66 km/h?
*September 16, 2009 by Nick*

**physics**

A 1.90-kg object is attached to a spring and placed on frictionless, horizontal surface. A horizontal force of 14.0 N is required to hold the object at rest when it is pulled 0.200 m from its equilibrium position (the origin of the x axis). The object is now released from rest...
*January 26, 2011 by Roo Kun*

**physics**

A rope of negligible mass pulls a 38-kg block block vertically upward with a constant acceleration of 6.0 meters per second squared. What is the tension of the rope?
*January 4, 2012 by Marilyn*

**physics**

Calculate the force needed to accelerate a 1 kg ball by 3 m/s: a. in space along way from the earth. b. on the ground in a direction horizontal to the ground. c. on the earth vertically upward.
*March 14, 2014 by Swastika*

**AP physics**

A particle of mass 3.00 kg is projected vertically upward with an initial velocity of 20.0 m/s. Neglecting air resistance, the particle’s kinetic energy when it is 20 m above the initial position is:
*December 11, 2014 by ali *

**physics**

The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end. The sharp upward slope launches them into the air, where they perform acrobatic maneuvers. In the women's competition, the end of ...
*October 24, 2010 by myx*

**Physics**

The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end. The sharp upward slope launches them into the air, where they perform acrobatic maneuvers. In the women's competition, the end of ...
*July 9, 2011 by Kristi*

**Physics**

The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end. The sharp upward slope launches them into the air, where they perform acrobatic maneuvers. In the women's competition, the end of ...
*June 27, 2012 by Emily*

**Physics**

The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end. The sharp upward slope launches them into the air, where they perform acrobatic maneuvers. In the women's competition, the end of ...
*September 18, 2012 by Donald*

**physics**

what is the magnitude of the resultant of a 6.0n force acting vertically upward and a 4.0n force acting horizontally
*January 1, 2013 by bridget*

**physics**

a mass is thrown vertically upwards with an initial velocity of 30m/s. a second mass is dropped 0.5s later from directly above the height of 60m from the mass. when do they meet and at what height?
*June 11, 2014 by adii *

**physics**

A wire having mass per unit length of 0.440 g/cm carries a 2.80 A current horizontally to the south. What are the direction and magnitude of the minimum magnetic field needed to lift this wire vertically upward?
*February 21, 2012 by Jessica*

**PHYSICS**

A BALL IS PROJECTED VERTICALLY UPWARD FROM THE TOP OF A TOWER 60MITRE HIGH WITH A VELOCITY OF 30MITRE PER SECONDS.WHAT IS THE MAXIMUM HEIGHT ABOVE THE GROUND LEVEL?HOW LONG DOES IT TAKE TO REACH THE GROUND?
*November 15, 2015 by Anonymous*

**physics**

a ball is thrown upward with an initial velocity. What is it's velocity to halfway to its highest point? the answer is the square root of 2, but how do u get that answer?
*October 19, 2008 by Anonymous*

**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 102**

THIS IS A QUESTION IN MY PHYSICS BOOK & I REALLY REALLY NEED HELP. I AM 48YRS OF AGE JUST DECIDED TO GO BACK TO SCHOOL AND HONESTLY KNOW NOTHING ABOUT PHYSICS. Two facts: A freely falling object at Earth’s surface drops vertically 5 m in 1 s. Earth’s curvature “drops” 5 m for...
*September 25, 2013 by Miss Angie*

**physics please help**

One end of a thin rod is attached to a pivot, about which it can rotate without friction. Air resistance is absent. The rod has a length of 0.59 m and is uniform. It is hanging vertically straight downward. The end of the rod nearest the floor is given a linear speed v0, so ...
*November 27, 2010 by roni*

**Physics -- check answers please**

1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is? my answer: 320N 2. What is the kinetic energy of a 20 kg object moving at a speed of 10 m/s? my answer: 1000J 3. the gravitational potential energy of a bird ...
*February 23, 2014 by Lisa*