Friday

December 2, 2016
**Physics**

An object gets the acceleration 8.0 m/s2 in a vertical direction (y) but 5.0 m/s2 in a horizontal direction (x). What will be the position of the object at the time t=2.0 s if his initial postiotion was (0,0), initial speed in y-direction 0 and in x-direction 5.0 m/s? Given ...

*Friday, May 16, 2014 by Physics: Motion in two dimensions?*

**Physics**

The position of an object is described as x = 4.0t and y= 1.5t2 - 2t + 1.0. All factors are in SI-units. a) What is the begining velocity of the object? b) What is his acceleration? c) What is the direction along the x-axe at the time t=1.0 s ? Given answers are: 4.5 m/s in -...

*Friday, May 16, 2014 by Physics: Motion in two dimensions?*

**physics**

A table clock has its minute hand 4.0 cm long. find the average velocity of the tip of the minute hand (a) between 6am to 6.30am and (b) between 6am to 6.30pm

*Friday, May 16, 2014 by harit*

**physics**

2 particles ar moving with constant speed v such that they are always at a constant distance d apart and their velocities are always equal and opposite. After what time they return to their initial positions?

*Friday, May 16, 2014 by harit*

**physics**

A ball is projected horizontally from the top of a 98m high cliff with an initial speed of 14.4 m/s. Determine the magnitude of the final speed the instant prior to hitting the ground

*Friday, May 16, 2014 by tenzin*

**physics**

Determine the launch speed of a horizontally-launched projectile which lands 27.4 meters from the base of a 17.9-meter high cliff.

*Friday, May 16, 2014 by tenzin*

**physics**

A soccer ball is kicked horizontally at 16.1 m/s off the top of a field house and lands 37.5 metes from the base of the field house. Determine the height of the field house.

*Friday, May 16, 2014 by tenzin*

**physics**

john and paul are trying to move a 100kg piano which is resulting on a flat, smooth floor. John pushing towards the North, while Paul is pushing towards the East. Both are exerting a 100N force. What is acceleration of the piano (magnitude and direction)? A=200/100=2m/s^2 ...

*Friday, May 16, 2014 by trish*

**physics**

john and paul are trying to move a 100kg piano which is resulting on a flat, smooth floor. John pushing towards the North, while Paul is pushing towards the East. Both are exerting a 100N force. What is acceleration of the piano (magnitude and direction)? A=200/100=2m/s^2

*Friday, May 16, 2014 by trish*

**physics**

a pendulum is swinging back and forth once every 1.25 second, how much longer should the pendulum be to increase its period by 0.200 second

*Friday, May 16, 2014 by sara*

**Physics **

A 6.0kg box is on a frictionless 45∘ slope and is connected via a massless string over a massless, frictionless pulley to a hanging 2.4kg weight. What is the tension in the string if the 6.0kg box is held in place, so that it cannot move? If the box is then released, ...

*Friday, May 16, 2014 by Physics Help*

**Physics **

Two-thirds of the weight of a 1500kg car rests on the drive wheels. Assume that μs = 0.74. What is the maximum acceleration of this car on a concrete surface?

*Friday, May 16, 2014 by Physics Student *

**physics**

Soccer player #1 is 7.31 m from the goal, as the figure shows. If she kicks the ball directly into the net, the ball has a displacement labeled . If, on the other hand, she first kicks it to player #2, who then kicks it into the net, the ball undergoes two successive ...

*Thursday, May 15, 2014 by chuck*

**Physics **

A rescue team has to use a specially designed sling-shot to supply emergency medicine to a stranded hiker. The hiker's altitude above the ground is 320m and his horizontal distance from the launch site is 410m. The launching angle of the initial velocity is 68 degrees from...

*Thursday, May 15, 2014 by Becky*

**physics**

Soccer player #1 is 7.31 m from the goal, as the figure shows. If she kicks the ball directly into the net, the ball has a displacement labeled . If, on the other hand, she first kicks it to player #2, who then kicks it into the net, the ball undergoes two successive ...

*Thursday, May 15, 2014 by chuck*

**Physics**

Calculate the escape velocity of a satellite launched from the earth surface if the radius of the earth is 6.4x10^6m

*Thursday, May 15, 2014 by Victor*

**Physics**

Please help me go through this F = q1q2/r^2, i know this is the equation, but i don't know how to get the answer, please help. What is the electric force between a +2 µC point charge and a –2 µC point charge if they are separated by a distance of 5.0 cm? ...

*Thursday, May 15, 2014 by Me and I*

**Physics**

A police car is asked to overtake a red sedan that is 1.6 km ahead of it on the freeway. The red sedan is traveling at 80 km/hr and the police car travels at 100 km/hr. When will the police car overtake the sedan?

*Thursday, May 15, 2014 by Cas*

**physics**

croquet ball must have a set mass of 0.50 kg. a red ball moving at 10.0 m/s, strikes an at-rest green ball head on. The red ball continues moving at 1.5 m/s after it hits the green ball. What is the final speed of the green ball?

*Thursday, May 15, 2014 by Jean*

**physics**

Consider the observable M that corresponds to a measurement in the sign basis where the measurement value is 3 if the outcome is + and −2 if the outcome is −. Write M in the standard basis. If M is the Hamiltonian acting on a qubit which is in the state |ψ(0...

*Thursday, May 15, 2014 by Sam*

**Physics **

A person of mass 50.0 kg is at the bottom of a cave. The cave has a depth of 32.5 meters and the person is to be pulled out of the cave vertically by a rope, starting from rest. What is the shortest amount of time that this could take if the rope can withstand a maximum ...

*Wednesday, May 14, 2014 by Tyler *

**st anthenis physics**

A+B+C=0out of three vector two r equal in magnitudeand magnitude of third is root 2times that of eitherof two hsving equal magnitude.than angle beteen vectors r

*Wednesday, May 14, 2014 by rashika*

**st francis physics**

|AxB|=root 3A.B then A+B=

*Wednesday, May 14, 2014 by rashika*

**Physics (acceleration)**

1. Jasmine rode a horse down a path headed north. she started from rest and then accelerated at 0.5 m/s2 for 12 seconds and then travelled at a constant speed for 28 seconds. a.) what was her velocity after 12 seconds? b.) what was jasmines displacement after 10 seconds? c.) ...

*Wednesday, May 14, 2014 by Samaira*

**physics**

A square loop of wire of side 2.8 cm carries 3.0 A of current. A uniform magnetic field of magnitude 0.67 T makes an angle of 43° with the plane of the loop. (a) What is the magnitude of the torque on the loop? (b) What is the net magnetic force on the loop?

*Tuesday, May 13, 2014 by caroline*

**Physics -- HELP PLEASE**

. Water with a mass of 1000kg leaves a hose at 20oC and is converted by the heat from the fire into steam at 300oC. List the steps needed in order to determine the amount of heat that is added to the water. For each step show the formula that must be used and replace the ...

*Tuesday, May 13, 2014 by Anonymous*

**physics**

a disk of mass M and radius R is attached to a spring of constant k .the disk rolls back and forth without slipping. the angular frequency of the motion of the disk is

*Tuesday, May 13, 2014 by kashyap*

**physics**

water in a dam is 15 m deep. a horizontal pipe of 4 cm diameter passes through the wall of the dam below the surface of water. a plug secures the pipe opening. the frictional force between the plug and pipe wall is about?

*Tuesday, May 13, 2014 by kashyap*

**physics**

An airplane is 5,000 m above an observer and 2.1 km to the west of them and 1.5 km to the north of you. Determine the angle to the plane in the x – y axis and the total distance to the plane from you. Choose the x-axis east, y axis north, and z axis up.

*Tuesday, May 13, 2014 by tabby*

**Physics**

Water with a mass of 1000kg leaves a hose at 20oC and is converted by the heat from the fire into steam at 300oC. List the steps needed in order to determine the amount of heat that is added to the water. For each step show the formula that must be used and replace the ...

*Tuesday, May 13, 2014 by Water Q-7*

**Physics**

Water with a mass of 1000kg leaves a hose at 20oC and is converted by the heat from the fire into steam at 300oC. List the steps needed in order to determine the amount of heat that is added to the water. For each step show the formula that must be used and replace the ...

*Tuesday, May 13, 2014 by Roller coaster Q-7*

**Physics**

A roller-coaster car is moving at 20.0 m/s along a straight horizontal track. What is its speed after climbing a 15.0 m hill? Neglect the effects of friction.

*Tuesday, May 13, 2014 by Roller coaster Q-6*

**Physics**

The space shuttle typically orbits 400 km above the earth's surface. The earth has a mass of 5.98 × 1024 kg and a radius of 6,380 km. A) How much would a 2000 kg part for the space station weigh when it has been lifted to that orbit in the shuttle's cargo bay? B...

*Tuesday, May 13, 2014 by Space Shuttle-Q1*

**Physics please help?????**

Two small spaceships, each with mass m = 2000 kg, are in the circular Earth orbit of the figure, at an altitude h of 450 km. Igor, the commander of one of the ships, arrives at any fixed point in the orbit 90.0 s ahead of Picard, the commander of the other ship. At point P in ...

*Tuesday, May 13, 2014 by Janis*

**Physics **

A box of mass 1.50 kg is given an initial velocity of 12.5 m/s up an inclined ramp that makes an angle of 25.0o with the ground, which is horizontal. The coefficient of kinetic friction between the box and the ramp is 0.240. How long does the box slide up the ramp before it ...

*Tuesday, May 13, 2014 by Tom*

**Physics**

Two bicycle tires are set rolling with the same initial speed of 3.00m/s along a long, straight road, and the distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40 psi and goes a distance of 18.1m ; the other is at 105 ...

*Tuesday, May 13, 2014 by collegekid*

**Physics **

A block is sitting on a rough ramp. It is found that a force of F = 200.0 N (directed up the ramp) is required to keep the box from sliding back down the ramp. The angle 𝜃 is 35.0o and the mass of the box is 150.0 kg. What is the coefficient of static friction between...

*Tuesday, May 13, 2014 by Tom*

**Physics **

A box of mass 1.50 kg is given an initial velocity of 12.5 m/s up an inclined ramp that makes an angle of 25.0o with the ground, which is horizontal. The coefficient of kinetic friction between the box and the ramp is 0.240. How long does the box slide up the ramp before it ...

*Tuesday, May 13, 2014 by Tyler*

**physics**

an electron is accelerated from rest through a potential difference V. If the electron reaches a speed of 9.11*x10^6 m/s, what is the potential difference?

*Tuesday, May 13, 2014 by Rick*

**physics**

It the specific gravity of mercury is 13.6 and the atmospheric pressure is 70cm of mercury, what is the total pressure of the gas supply in cm of water if the height of water is increase by 3cm?

*Tuesday, May 13, 2014 by VICTOR*

**Physics**

A 0.28 kg softball has a velocity of 16 m/s at an angle of 34° below the horizontal just before making contact with the bat. What is the magnitude of the change in momentum of the ball while it is in contact with the bat if the ball leaves the bat with a velocity of (a) 21...

*Tuesday, May 13, 2014 by John*

**physics**

two large horizontal metal plates are separated by 4mm. the lower plate is at a potential of -6V. what potential should be applied to the upper plate to create electric field strength of 4000V/m upwards between the plate

*Tuesday, May 13, 2014 by muhammed*

**physics**

Oxygen diffuses from the surface of insects to the interior through tiny tubes called tracheae. An average trachea is about 2mm long and has cross-sectional area of 2×10−9m^2. Assuming the concentration of oxygen inside is half what it is outside in the atmosphere...

*Tuesday, May 13, 2014 by Anonymous*

**physics**

An aluminum can is ﬁlled to the brim with a liquid. The can and the liquid are heated so their temperatures change by the same amount. The can’s initial volume at 5 oC is 3.5×10−4 m3. The coefﬁcient of volume expansion for aluminum is 69&...

*Tuesday, May 13, 2014 by Guadalupe*

**physics**

What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)

*Monday, May 12, 2014 by caroline*

**physics**

Two mirrors are placed at a 90° angle to each other. A light ray strikes one mirror 0.730 m from the intersection of the mirrors with an incident angle of 36.5°. The ray then travels a distance d before reflecting from the second mirror. (a) What is the distance d?

*Monday, May 12, 2014 by Christina*

**Acceleration physics**

1. A sprinter finishes the race with a velocity of 8.9 m/s. the sprinter accelerated to a stop at a rate of -2.7 m/s2. how long did it take the sprinter to come to a stop? 2. A cycllist starts from rest & reaches a velocity of 18 m/s southwest in 3.8 seconds. what was the ...

*Monday, May 12, 2014 by Durga*

**Physics **

The figure shows the velocity graph of a 79kg passenger in an elevator. The graph is (0,0),(1,4),(5,8),(9,2) What is the passenger's apparent weight at t=1s,5s,9s?

*Monday, May 12, 2014 by Tom1*

**physics**

a diverging lens of focal length 30cm creates an image 3cm tall from an object that is 9cm tall where is the image located if the object is 60cm from the lens. what is the magnification

*Monday, May 12, 2014 by diane*

**physics**

In a classroom demonstration, a 790-N physics professor lies on a “bed of nails.” The bed consists of a large number of evenly spaced, relatively sharp nails mounted in a board so that the points extend vertically outward from the board. While the professor is lying ...

*Monday, May 12, 2014 by ashey*

**Physics**

In the figure, a uniform ladder of weight 200 N and length 10 m leans against a perfectly smooth wall. A firefighter of weight 600 N climbs a distance x up the ladder. The coefficient of static friction between the ladder and the floor is 0.50. What is the maximum value of x ...

*Sunday, May 11, 2014 by Kate*

**Physics**

A horizontal rope is tied to a 45.0kg box on frictionless ice. What is the tension in the rope if: A) The box is at rest? B) The box moves at a steady vx = 4.40m/s ? C) The box vx = 4.40m/s and ax = 4.60m/s2 ?

*Sunday, May 11, 2014 by TlP*

**Physics**

Sam, whose mass is 76kg , takes off across level snow on his jet-powered skis. The skis have a thrust of 220N and a coefficient of kinetic friction on snow of 0.1. Unfortunately, the skis run out of fuel after only 15s . How far has Sam traveled when he finally coasts to a stop?

*Sunday, May 11, 2014 by TP*

**Physics**

Bob is pulling a 30kg filing cabinet with a force of 200N , but the filing cabinet refuses to move. The coefficient of static friction between the filing cabinet and the floor is 0.80. What is the magnitude of the friction force on the filing cabinet? Express your answer to ...

*Sunday, May 11, 2014 by T*

**Physics HELP!!!!!!!!**

Suppose 0.021 mole of an ideal monatomic gas has a pressure of 1.00 atm at 273.15 K and is then cooled at constant pressure until its volume is reduced by 41.1 %. What is the amount of work done by the gas?

*Sunday, May 11, 2014 by suzan*

**Physics**

A ball with a mass of 12 g is moving at 15 m/s. It collides with a second ball with a mass of 36 g moving at 5 m/s in the same direction. After the collision, the 12-g ball moves at 6.0 m/s. How great is the change in momentum of the z36-g ball?

*Sunday, May 11, 2014 by Ali*

**physics**

A car moves along an x axis through a distance of 900 m, starting at rest (at x = 0) and ending at rest (at x = 900 m). Through the first ¼ of that distance, its acceleration is +2.25 m/s2 . Through the rest of that distance, its acceleration is – 0.750 m/s2 . Find...

*Sunday, May 11, 2014 by Anonymous*

**physics**

24 joule work is done in moving a charge of 6c between two points. Calculate potential difference between this two points.

*Sunday, May 11, 2014 by Jatindra Deori*

**Physics**

design a pair of ear defenders and explain how they work using big idea of energy transfer

*Sunday, May 11, 2014 by Jean Smith*

**Physics**

A cyclist starts from rest and coasts down a 6.5∘{\rm ^\circ} hill. The mass of the cyclist plus bicycle is 95kg{\rm kg} . The cyclist has traveled 270m{\rm m} .What was the net work done by gravity on the cyclist? How fast is the cyclist going? Ignore air resistance.

*Saturday, May 10, 2014 by Anonymous*

**physics- answers check**

5. A magnetic field map shows a. the direction of the magnetic field. b. a few representational field lines. c. relative strength of the magnetic field. d. All of these choices are correct. my answer: d 6. Magnetic field lines a. can cross each other when the field is strong. ...

*Saturday, May 10, 2014 by Liz*

**physics- answers check**

1. For a bar magnet, the magnetic field lines point a. towards the South pole. b. towards the North pole. c. always towards the magnet. d. always away from the magnet. my answer: a 2. Magnetic field lines a. are straight lines. b. are always circles. c. form continuous loops. ...

*Saturday, May 10, 2014 by Liz*

**physics**

If I am standing on top of a building that is 350 ft. high and I throw a baseball off the roof at angle of 60 degrees, determine how long the ball is in the air as well as how far it lands from the building.

*Saturday, May 10, 2014 by Sophia*

**College Physics**

Metal sphere 1 has a positive charge of 7.00nC . Metal sphere 2, which is twice the diameter of sphere 1, is initially uncharged. The spheres are then connected together by a long, thin metal wire. What are the final charges on each sphere?

*Friday, May 9, 2014 by Sven*

**College Physics**

A 3.00-cm-diameter parallel-plate capacitor with a spacing of 0.800mm is charged to 300V . What is the total energy stored in the electric field?

*Friday, May 9, 2014 by Sven*

**Physics**

50.0pJ of energy is stored in a 3.00cm × 3.00cm × 3.00cm region of uniform electric field.

*Friday, May 9, 2014 by Anonymous*

**Physics**

A baseball is thrown from the roof of 23.5m -tall building with an initial velocity of magnitude 10.0m/s and directed at an angle of 53.1∘ above the horizontal. a.What is the speed of the ball just before it strikes the ground? Use energy methods and ignore air ...

*Friday, May 9, 2014 by Anonymous*

**Physics**

A ski tow operates on a slope of angle 14.9∘ of length 320m . The rope moves at a speed of 12.5km/h and provides power for 55 riders at one time, with an average mass per rider of 68.0kg .Estimate the power required to operate the tow.

*Friday, May 9, 2014 by Anonymous*

**physics**

Hello! I'm studying for physics and I am stuck on this question (I have the answer): Two identical cars are travelling on a horizontal road, one of them is going at twice the speed of the other one. Both break using the same force. The slower car breaks completely after ...

*Friday, May 9, 2014 by castiel*

**Physics**

A body is allowed to slide down a frictionless track freely under gravity.The track ends in a semicircular shaped part of diameter d.What should be the height(minimum) from which the body must fall so that it completes the circle?

*Friday, May 9, 2014 by S.U.*

**physics**

If a cyclist moving with a speed of 4.9 m/s on a level road can take a sharp circular turn of radius 4 m,then what is the coefficient of friction between the cycle tyres and the road?

*Friday, May 9, 2014 by Anonymous*

**Physics**

A 10kg box is initially at rest 10m above the ground level on top of a hill. The box starts to slide down the hill and when it reaches ground level it has speed 10m/s. Was there a friction force between the box and the ground? If so how much work did the force of friction do ...

*Friday, May 9, 2014 by Mason*

**Physics**

As shown in the picture to the right, a ball is suspended from the ceiling by a string of negligible mass. When the ball is set into motion such that it moves in a horizontal circle at a constant speed of 1.6m/s, the tension in the string is 7.7N. What is the length of the ...

*Friday, May 9, 2014 by T.J.*

**Physics**

Two blocks are connected by a cord passing over a small frictionless pulley. The angle is 30 degrees, and the mass of the small block is m=15kg. If the coefficient of friction between the small block and the inclined plane is .25 and the large block is accelerating down at 2m/...

*Friday, May 9, 2014 by T.J.*

**Physics**

A 2kg begins at the top of a 1m high frictionless, inclined plane on top of a 1.5m high table. If it is loaded onto a spring with spring constant 50N/m and compressed 10 cm from equilibrium and then released, how far from the edge of the table will the block land?

*Friday, May 9, 2014 by Sandy*

**Physics**

1. A 40Ω , 20Ω and 60Ω resistor is connected in a parallel circuit. Which resistor would have the greatest current passing through it and why? 2. A 24Ω , 8Ω and 60Ω resistor is connected in a series circuit. Which resistor would have the greatest ...

*Thursday, May 8, 2014 by Liz*

**Physics**

A cannonball is hot straight up from the edge of a cliff with an initial velocity of 30m/s. A second cannonball is shot straight downward from the edge of the same cliff with an initial velocity of -30m/s. How do the speeds of the two cannonballs compare when they reach the ...

*Thursday, May 8, 2014 by Sandy*

**Physics**

Peter is shooting arrows at a target with a bow. The target is 10m above the arrows launch point and some distance from Peter. If the arrows are shot with initial velocity Vo at 60 degrees with respect to the ground, then they will hit the target at the highest point of their ...

*Thursday, May 8, 2014 by Sandy*

**Physics**

A daredevil performs a stunt in which he jumps with his motorcycle from a horizontal cliff 10m high. What must the initial velocity of the motorcycle be, in order for the stuntman to barely clear a 10m wide water canal at the base of the cliff?

*Thursday, May 8, 2014 by Tim*

**Physics**

Starting from rest, a horse pull a 250-kg cart for a distance of 1,5km. it reaches a speed of 0,38m/s by the time it has walked 50,0m and then walks at constant speed.fictional force 260n.each gram of oats the horse eats releases 9kJ of energy. 10% of this can go into work the...

*Thursday, May 8, 2014 by Marina*

**Physics**

A little girl is standing on a cliff and throws a ball straight down at a speed of 5m/s towards the ground below. How far has it fallen 2.0 seconds after it leaves her hand?

*Thursday, May 8, 2014 by Tim*

**Physics**

A ball leaves a table with an initial horizontal velocity of 2.4m/s. The height of the table is adjustable. In two runs, the height of the table is set at 2.5m and 5.0m respectively. Assume air resistance is negligible. What is the horizontal distance between the two landing ...

*Thursday, May 8, 2014 by Tim*

**physics**

A hammer is being used to pull a nail out of a horizontal board. L = 32 cm and d = 5.2 cm. If a force of 158 N is exerted horizontally as shown, calculate the force (in N) exerted by the hammer claws on the nail.

*Thursday, May 8, 2014 by sydwell*

**physics**

As an astronaut, you observe a small planet to be spherical. After landing on thte planet you set off, walking always straight ahead, and find yourself returning to your spacecraft from the opposite side after completing a lap of 26.5 km. You hold a hammer at a height of 1.31 ...

*Thursday, May 8, 2014 by sydwell*

**Physics 270-1 Applied**

A rock is thrown down with an initial speed of 30.0ft/s from a bridge to the water below. It takes 3.50s for the rock to hit the water. (a) Find the speed (in ft. /s) of the rock as it hits the water. (b) How high is the bridge above the water?

*Thursday, May 8, 2014 by jason*

**PHYSICS PLEASE HELP QUICKLY**

Multiple choice please help :) Which of the following is equivalent to one ampere? 10 s/10 C 10 C/10 m 1.5 C/1.5 s 15 C/10 s

*Thursday, May 8, 2014 by Hope*

**Multiple Choice**

Physics 2. Which of the following is equivalent to one ampere? (Points : 1) 10 s/10 C 10 C/10 m 1.5 C/1.5 s 15 C/10 s Question 3.3. A stream of moving charges results in a current of 5.6 A. How long does 116 C of charge take to flow past a fixed point? (Points : 1) 2.0 s 5.6 s...

*Thursday, May 8, 2014 by Steven*

**Physics**

If 50 ft lbs of work is done on the same spring (in part a) in order to compress it, by how much is the spring shortened? *Information on part (a) is 400 #/in is the k constant and 1.75" is the compression. 50 ft lbs = 600 in lbs equation is: 1/2 * 600" lb * 1.75&...

*Thursday, May 8, 2014 by Adam -Please check if I'm Correct*

**Physics question help/ check my answers**

The middle two question please check my answers and tell me if I am correct or if there is something I am missing. The first and the last question I need help to understand and complete it. Thank you in advance!!! 1. What is the electric force between a +2 µC point ...

*Thursday, May 8, 2014 by Brianna*

**Physics**

A.) How much work must be done in order to compress a spring with an elastic constant of 400 lb / in and 1.75 inches? *Note: 1.75" is the compression & 400#/in is the k constant. B.) If 50 ft lbs of work is done on the same spring (in part a) in order to compress it, by ...

*Thursday, May 8, 2014 by Need some help on the set-up, Please!*

**PHYSICS**

How do I determine final velocity in the equation Vf^2=Vi^2 + 2ad ?

*Thursday, May 8, 2014 by Adam - Working on Physics As Well-Right Now*

**Physics**

How do I get the final velocity from Vf^2 = Vi^2 + 2ad. Here are my following numbers: Vi= 0.3048 m/s Vf= ? d = 22.86 m a = 166 m/s^2 t = Not required Based on the numbers I have would I set it up this way??? Vf^2= 0.3048^2 + 2*(166*22.86) This process comes out to an ...

*Thursday, May 8, 2014 by Adam - Require More Help Please - Set-up Concerns*

**Physics**

A.) How much work must be done in order to compress a spring with an elastic constant of 400 lb / in and 1.75 inches? *Note: 1.75" is the compression & 400#/in is k the constant. B.)If 50 ft lbs of work is done on the same spring (in part a) in order to compress it, by ...

*Thursday, May 8, 2014 by Adam - Require Help Please - Set-up Concerns*

**PHYSICS**

A 3.0 kg block is moved up a 37 degree incline under a constant horizontal force of 40.0 N. The coefficient of friction is 0.10 and the block is displaced 2.0 m up the incline. Calculate the change in the kinetic energy of the block.

*Thursday, May 8, 2014 by HELP HELP ME PLEASE*

**Physics**

Q: Japanese honeybees have a unique defensive mechanism against their natural predator, the giant hornet. When threatened by a hornet attacking the nest, worker bees will work together to surround the hornet, and then vibrate to create heat. If enough bees work together, the ...

*Thursday, May 8, 2014 by Rebecca*

**physics**

A 70 kg man holding a 0 . 857 kg ball stands on a frozen pond next to a wall. He throws the ball at the wall with a speed of 11 . 9 m / s (relative to the ground) and then catches the ball after it rebounds from the wall. How fast is he moving after he catches the ball? Ignore...

*Wednesday, May 7, 2014 by nic*

**Physics**

A 3.0 kg block is moved up a 37 degree incline under a constant horizontal force of 40.0 N. The coefficient of friction is 0.10 and the block is displaced 2.0 m up the incline. Calculate the change in the kinetic energy of the block.

*Wednesday, May 7, 2014 by Andrew*

**physics**

A 60.0 kg box is lifted straight upward by a rope, a distance of 10.0 meters, at constant speed. How much power is required to complete this task in 5.00 seconds?

*Wednesday, May 7, 2014 by Anonymous*

**Physics**

A 3.0 kg block is moved up a 37 incline under a constant horizontal force of 40.0 N. The coefficient of friction is 0.10 and the block is displaced 2.0 m up the incline. Calculate the change in the kinetic energy of the block.

*Wednesday, May 7, 2014 by Andrew*

**Physics**

On a roller coaster ride the cart is 250 kg. Initially, the cart is traveling at 5 m/s at the upper level, and then 25 once it reaches the flat lower level that is 8 m off the ground. How high up is the upper level?

*Wednesday, May 7, 2014 by Eiban*