Friday
July 31, 2015

Homework Help: Science: Physics

Recent Homework Questions About Physics

physics
a stone is thrown horizontally with an initial velocity of 15m/s from a tower 20 meters high. How long does the stone take to reach the ground?
Tuesday, July 14, 2015 by wilson

Physics
A 2 kg block of cheddar cheese hangs from an ideal spring of negligible mass. When displaced from equilibrium and released, the cheese oscillates with a period of 0.4 secs. How much the spring stretched when the cheese hangs in equilibrium?
Tuesday, July 14, 2015 by Kristina

Physics, Eectric flux
A cubical Gaussian surface surrounds three positive charges, each has a charge q1 = +4.00 × 10-12 C, and two negative charges, each has a charge q2 = −2.30 × 10-12 C as the drawing shows. What is the electric flux passing through the surface?(The permittivity...
Monday, July 13, 2015 by Dave

Physics
An airplane pulls into a vertical loop, and has horizontal and vertical velocities Vx=90m/s and Vy=120m/s. If the radius of curvature of the flight path is R=900m, and the airplane has a vertical acceleration Ay=11m/s^2, determine its tangential and horizontal accelerations at...
Monday, July 13, 2015 by J.T.

Chemistry/Physics
How much heat is required to raise the temperature of 100 g of lead 20 degrees C? The specific heat of lead is 0.0305 cal/g K. A) 51 cal B) 61 cal C) 71 cal D) 81 cal
Monday, July 13, 2015 by Domino

School of Christ International, physics
A value of 22.0m of nitrogen gas at 20°c is heated under constant pressure to 167°c What is the new nitrogen gas
Monday, July 13, 2015 by MOSES

Physics
The electric potential at a position located a distance of 20.1 mm from a positive point charge of 6.50×10-9C and 12.1 mm from a second point charge is 1.26 kV. Calculate the value of the second charge.
Monday, July 13, 2015 by Julie

Physics
Three people pull horizontally on ropes attached to a post, as shown in the figure.(Figure 1) The total force that they exert on the post is zero. One of them pulls directly north with F1 = 500 N . Another pulls with F2 = 400 N in a direction 60.0∘ west of north. Find ...
Monday, July 13, 2015 by Nerdy

physics
A player kicks a football at an angle of 45 degree with initial speed of 20 metre per second a second player on the goal line 60 metre away in the direction of a kick start training to receive the ball at that instant find the constant speed of the second player with which he ...
Monday, July 13, 2015 by palash

physics
A picture hangs on the wall suspended by two strings, as shown in the figure, with θ = 65°. The tension in string 1 is 1.3 N. (a)Is the tension in string 2 greater than, less than, or equal to the tension in string 1? Explain. (b) Verify your answer to part (a) by ...
Sunday, July 12, 2015 by john

physics
A baseball player slides into third base with an initial speed of 7.75 m/s. If the coefficient of kinetic friction between the player and the ground is 0.45, how far does the player slide before coming to rest?
Sunday, July 12, 2015 by john

physics
speed limit on freeway is 36 m/s and speed limit on service drive is 9 m/s. Mr. Scotts focus has a mass of 900 kg. Since friction depends on so many factors such as the condition of the vehicle and direction of wind, the civil engineer neglects it. 1. How deep should the ...
Sunday, July 12, 2015 by sani

Physics
A picture hangs on the wall suspended by two strings, as shown in the figure, with θ = 65°. The tension in string 1 is 1.3 N. (a)Is the tension in string 2 greater than, less than, or equal to the tension in string 1? Explain. (b) Verify your answer to part (a) by ...
Sunday, July 12, 2015 by mohammad

Physics
A brass rod 50.0 cm long expands 0.0734 cm when heated. Find the temperature change. Using the equation Change in temp=change in length/original length * coefficient of linear expansion for brass I am getting the following result: .0734 cm/(1.9x10^-5)(50 cm) = 193157.8947 Can ...
Sunday, July 12, 2015 by Jackie

physics
The coefficient of static friction between a block and a horizontal floor is 0.33, while the coefficient of kinetic friction is 0.11. The mass of the block is 3.7 kg. If a horizontal force is slowly increased until it is barely enough to make the block start moving, what is ...
Sunday, July 12, 2015 by shahanoor

Physics
The problem statement, all variables and given/known data A body is thrown upward and remains in air for 10 seconds , the initial velocity at which it was thrown in is? The attempt at a solution g = -10 , t = 10 s , vf = 0 , vi = ? Vf = vi + gt 0=vi + (-10) (10) Vi = 100 but ...
Sunday, July 12, 2015 by Shahab Mirza

Physics
A car travelling with constant acceleration increases its speed from 10 m/s to 50 m/s over a distance of 60 m . how long does this take? a. 2 seconds b. 4 seconds . Data : Avg Velocity = 10 + 50 / 2 = 30m/s Distance = 60 meter time = ? Solution : S= V x T making "T" ...
Sunday, July 12, 2015 by Shahab Mirza

Physics
A 480 N man is standing on a 120 N pole supported by 2 blocks. The pole is 6 m long. One block is at the end while the other is 2 m away from the center. Where should the 480 N man stand?
Sunday, July 12, 2015 by Patrick

physics
A 320 N bench is 2.40m long. The legs are .30m from each end and weigh 15.0 N each. If 3 persons weighing in order ,500 N, 750N, and 1000N sit .40m, 1.20m, and 2m respectively from one end of the bench, what downward force must each set of legs exert on the floor?
Sunday, July 12, 2015 by John

Physics
If a parallel-plate capacitor in a RC circuit has a 10 C charge on each plate when it is disconnected from the battery, and in 10 sec drops to 10% of its initial charge, what is its capacitance? (Assuming R = 10 ohms) Not sure which formula to use/
Saturday, July 11, 2015 by Patch

Physics
Hello! I am having trouble figuring out the answer for this question: A 60 kg water skier is being pulled behind a boat. If the propulsive force applied by the 500 kg boat is 2.50 * 10^3 N, determine the acceleration of the skier and tension force in the tow rope? Work: Fnet= ...
Saturday, July 11, 2015 by Lucina

physics
cant find much on how to solve problems like these. any help would be appreciated. A pressure of 6000 Pa is exerted on a wall of 12 square meters area. What force is exerted on the wall? What is the pressure at the bottom of a 50 m tall water tower? What is the pressure at the...
Saturday, July 11, 2015 by ?

physics
An ammeter indicates the current for a toaster is 5.0 amps when the toaster is connected to 120-V circuit. How much energy is given off by the toaster in 55.0 seconds? Show all calculations leading to an answer.
Saturday, July 11, 2015 by allexelle

physics
Two electrically-charges spheres are suspended from insulated threads a certain distance from each other. There is a certain amount of electrostatic force between them. Describe specifically (not just increase or decrease) what happens to this force in each of the scenarios ...
Saturday, July 11, 2015 by allexelle

physics
A hard-rubber or plastic comb rubbed against wool can often be shown to have a static charge. Why does a metal comb not readily show a static charge when rubbed against wool? Use 3 – 4 complete sentences in your answer.
Saturday, July 11, 2015 by allexelle

physics
Suppose the thickness of an oil film on water is just the right thickness for canceling red light. What color will your eye see? Explain using 3 – 4 complete sentences
Saturday, July 11, 2015 by allexelle

physics
What conditions must exist for a converging lens to produce a real image of an object that is larger than the object itself? Please respond with 3 - 4 complete sentences.
Saturday, July 11, 2015 by allexelle

physics
Suppose a piano tuner hears 2 beats/second when listening to the combined sound from the tuning fork and the piano note being tuned. After slightly loosening the string, she hears 1 beat/second. Should she continue to loosen the string or tighten it in order to get it “in...
Saturday, July 11, 2015 by allexelle

physics
A photon of light has a wavelength of about 600 nm (1nm = 1 x 10-9 m). What is the energy of this photon of light? Show all calculations leading to an answer.
Saturday, July 11, 2015 by allexelle

physics
A ball is thrown at 22m/s at 45 degrees to the horizontal. a fence 5 feet tall is located 100 meters away. Does the ball make it over the fence?
Saturday, July 11, 2015 by MIKE

Physics
M1 = 45.0 kg is a spherical mass at the origin. M2 = 16.6 kg is also a spherical mass, and is located on the x-axis at x = 78.0 m. At what value of x would a third mass M3 = 15.5 kg experience no net gravitational force due to M1 and M2?
Saturday, July 11, 2015 by Natalie

physics
A cement company is moving lime using an Archimedes screw system. The density of the lime p=2700 kg/m^3. The available area inside the screw system A=0.01 m^2 and the screw advance speed v=0.5 m/s. What is the mass flow rate?
Friday, July 10, 2015 by ?

Physics
A particle (charge = +4.0 nC) is located on the x-axis at the point x = -20.0 m, and a second particle (charge = -10.0 nC) is placed on the x-axis at x=+8.0 m. What is the magnitude of the total electrostatic field (in N/C) at the origin (x=0)?
Friday, July 10, 2015 by oday

Physics
In procedure 1: suppose the hanging mass is mH = 203 g and the mass of the cart is mC = 1286 g. a) Assume there is no friction anywhere in the system, and the system starts at rest. i. Find the magnitude of the acceleration of the masses. a = m/s2 ii. Find the magnitude of the...
Friday, July 10, 2015 by Sara

physics
A book has the mass of 1.5 kg what is pressure that it puts down on the table if it has the dimension 20cm by 26 cm? What would the pressure be if it were on end with the dimensions of 20 cm by 4 cm?
Friday, July 10, 2015 by ?

Physics
A boy travels 8km north, 3km east and then 5km south. Find the magnitude of displacement of the boy
Friday, July 10, 2015 by Anhigna

Physics
A boy moves 10km eastwards, 5km northwards and then 2km eastwards. The distance and magnitude of displacement of the boy is
Friday, July 10, 2015 by Anhigna

physics
A bar 4.0 m long weighs 400. N. Its center of gravity is 1.5 m from one end. A weight of 300. N is attached at the heavy end and a weight of 500. N is attached at the light end. What are the magnitude, direction, and point of application of the force needed to achieve ...
Thursday, July 9, 2015 by G

physics
A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0 kg, and a 43.0-kg child sits on the other end. The beam balances when a fulcrum is placed below the beam a distance of 1.10 m from the 30.0-kg child. How long is the beam?
Thursday, July 9, 2015 by Mary

Physics
Four identical point charges of q = 4.64 nC are at the four corners of a square with a side length of 13.5 cm as shown in the figure. What charge Q should be placed at the center of the square to keep the other four charges in equilibrum?
Thursday, July 9, 2015 by Julie

physics
Charges of 4.0 µC and -6.0 µC are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field magnitude created by these two charges? (ke = 8.99 ´ 109 N·m2/C2)
Thursday, July 9, 2015 by Anonymous

Physics
A uniform 7.9-m plank weighing 130 N lies on a platform with 3.5 m jutting off the platform. How far out on the plank from the edge of the platform can a 31-N dog walk without tipping the plank?
Thursday, July 9, 2015 by Kate

Physics
Answer True or False to each case. Coulomb's law states that the force between static charges Q1 and Q2 is proportional to Q1 Q2. is proportional to the total charge Q1+Q2. is K Q1Q2/r where K is a universal constant. is proportional to 1/r2. is a force of attraction.
Thursday, July 9, 2015 by Julie

Physics
A child (48 kg) stands on the edge of a stationary merry-go-round (uniform disk of radius 1.2 m and mass 50 kg). The child jumps off at 1.0 m/s with respect to the ground in the direction tangential to the edge. Find the angular speed of the merry-go-round after the jump. ...
Thursday, July 9, 2015 by Mary

PHYSICS
Write 5 multiple-choice exam questions on any topics of your choice. A good question should be of sufficient difficulty and perhaps have a good background story? Try to change questions you've seen previously? Post your favorite question to the blackboard discussion board
Thursday, July 9, 2015 by GEORGE

PHYSICS
In 2286, Admiral Kirk and his crew were forced to use the sling shot effect in a stolen Klingon Bird-of-Prey to travel back in time to the late 20th century to retrieve two humpback whales. The stolen Klingon Bird-of-Prey traveled towards the sun at a velocity of v, while the...
Thursday, July 9, 2015 by GEORGE

PHYSICS
Consider holding a carton of milk in your hand, as shown in the image. The force of the bicep muscle acts at an angle of 15 o to the vertical, while the weight of the arm and the milk both act downwards. The distance from the elbow to where the bicep muscle is attached via the...
Thursday, July 9, 2015 by GEORGE

PHYSICS
Consider a series of integers a1< a2<... < a43 < a44 that are all positive and all of the numbers are taken to be less than 125. There are 43 differences between adjacent numbers in this series defined as,di= ai+1 - ai . Can you prove that some value of the ...
Thursday, July 9, 2015 by GEORGE

PHYSICS
Consider a series of integers that are all positive and all of the numbers are taken to be less than 125. There are 43 differences between adjacent numbers in this series defined as, . Can you prove that some value of the differences (which must also be positive integers) must...
Thursday, July 9, 2015 by GEORGE

Physics
A car's bumper is designed to withstand a 6.84-km/h (1.9-m/s) collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force on a bumper that ...
Thursday, July 9, 2015 by Karina

Physics
Using energy considerations, calculate the average force a 62.0 kg sprinter exerts backward on the track to accelerate from 2.00 to 5.00 m/s in a distance of 25.0 m, if he encounters a headwind that exerts an average force of 30.0 N against him.
Thursday, July 9, 2015 by Karina

physics
Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 95.0 kg, down a θ = 50.0° slope at constant speed. The coefficient of friction between the sled and the snow is 0.100. (a) How much work is done by friction as the sled moves 30.0 m along ...
Thursday, July 9, 2015 by Karina

Physics
A particle travels along the x axis with a constant acceleration of +2.7 m/s2. At a time 4.2s following its start, it is at x = -108 m. At a time 5.7 s later it has a velocity of +13.0 m/s. Find its position at this later time. Please use kinematic equations to solve.
Thursday, July 9, 2015 by Anonymous

Physics
Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 30 m apart. The train on the left accelerates rightward at 1.17 m/s^2. The train on the right accelerates leftward at 1.1 m/s^2. (a) How far does the train on the left travel ...
Thursday, July 9, 2015 by Anonymous

Physics
Two cars are traveling along a straight road. Car A maintains a constant speed of 79 km/h and car B maintains a constant speed of 114 km/h. At t = 0, car B is 36 km behind car A. (a) How much farther will car A travel before car B overtakes it? ? km (b) How much ahead of A ...
Wednesday, July 8, 2015 by Anonymous

Physics
I've read all my resource materials and looked for outside resources already and i can't find an equation for this. I would appreciate any help
Wednesday, July 8, 2015 by randy

Physics
Two objects are connected by a massless string, as shown in the figure below. The incline and pulley are frictionless. (a) Find the acceleration of the objects. (Assume that positive acceleration is to the right for m1 and downward for m2. Answer using m1 for m1, m2 for m2, g ...
Wednesday, July 8, 2015 by Anonymous

physics
A uniform bar 25 meters long weighs 10,000 Newton's. From end A weight of 2500 Newton's is hung. At B the other end of the bar, there is a weight of 3500 Newton's. An upward force of 3000 Newton's is exerted 4 meters from B, while and upward force of 4000 ...
Wednesday, July 8, 2015 by G

Physics (Kinematics Check)
What is the average velocity of a dropped brick that falls 4.0 m? vi = 4.0 m/s vf = 0 m/s a = 9.81 m/s^2 t = vf-vi / a t = -4/9.81 t = 0.41 s v = d/t v = 4.0/0.41 v = 9.81 m/s^2 <----------
Wednesday, July 8, 2015 by Lucina

Physics
What Precaution should be take in static and kinetic friction experiment?
Wednesday, July 8, 2015 by Rainie

physics
a) What is the magnitude of the electric field at a point midway between a −8.5μC and a +8.5μC charge 8.0cm apart? Assume no other charges are nearby. b) What is the direction of the electric field?
Wednesday, July 8, 2015 by Aly

Physics
I want to calibrate a barometer using current pressure. I live in a town with altitude 540m (at the top of an escarpment) but the closest internet pressure readings are from a town which is 50m above sea level(at the bottom of the escarpment). Assuming the temperature varies ...
Wednesday, July 8, 2015 by Bob

PHYSICS PLS HELP
A falling 50-kg skydiver experiences an upward acceleration of 6.2 m/s2 when she opens her parachute. Show (by calculation) how much drag force is produced by the parachute.
Tuesday, July 7, 2015 by allexelle

HELP PLS PHYSICS
In three scenarios a truck is towing a boat on a trailer. Using 3 – 4 complete sentences indicate which scenario(s) (if any) is the force of the truck on the trailer greater than the force of the trailer on the truck: Scenario A: masstruck = 1000 kg, massboat and trailer...
Tuesday, July 7, 2015 by allexelle

Physics
A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 6.0 m, y = 3.0 m, and has velocity v = 4.0 m/s + -1.0 m/s . The acceleration is given by the vector a = 4.0 m/s2 + 0 m/s2 . (a) Find the velocity vector at t = 3.0 s. ?( m/s...
Tuesday, July 7, 2015 by Anonymous

physics
A person who weighs 80kg sliding down a 30 degree incline with a coefficient of friction of .20 A person who weighs 80 kg sliding down a 20 degree incline with a coefficient of friction of .20 A person who weighs 40 kg sliding down a 20 degree incline with a coefficient of ...
Tuesday, July 7, 2015 by G

physics
The angular speed of a rotor in a centrifuge increases from 428 to 1400 rad/s in a time of 6.26 s. (a) Obtain the angle through which the rotor turns. (b) What is the magnitude of the angular acceleration?
Tuesday, July 7, 2015 by randy

Physics
Which of the following is a scalar quantity? displacement perpendicular component of force parallel component of force work
Tuesday, July 7, 2015 by John B

Physics
A rope pulls on a metal box at an angle of 60.0° with a force of 255 N. The box moves horizontally for 15.0 m. How much work was done on the box? 1910 J 3310 J 255 J 3830 J
Tuesday, July 7, 2015 by John B

physics
A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 6.3 m/s2; after 4.1 s he enters the main speedway. At the same instant, another car on the speedway and traveling at a constant ...
Tuesday, July 7, 2015 by Anonymous

SCTD
Physics a satellite orbiting 3.22 times 10 to the 5th power meters above the surface of the earth get the mass of the satellite is 3.80 times 10 to the 4th kilograms what is the weight or gravitational force exerted on the satellite by the earth?
Tuesday, July 7, 2015 by Jason

physics
the total force opposing motion of the box and the parachute at particular time during its fall is 30N.the combined mass of the box and parachute is 5kg 1. Caculate the resultant downward force and box and the parachute (g=10N)
Tuesday, July 7, 2015 by Blessong

physics
a car pulling two trailers accelerates from 10m/s to 12m/s in 10s. if the masses of the car and the trailers are respectively 2000kg, 500kg and 300kg.calculate the tension in the tow bar a)between the car and 500kg trailor b)between the 500kg and 300kg trailers
Tuesday, July 7, 2015 by Mostafa

physics
a 2000kg car travelling west with a speed of 20m/s collides at an intersection with a 3000kg car travelling south at a speed of 20m/s. find the direction and magnitude of the velocity of the wreckage after the collision, assuming the collision was perfectly inelastic(that is, ...
Tuesday, July 7, 2015 by Mostafa

physics
Suppose you moved a box across a rough horizontal surface with a 50 N force over a displacement of 10 m. If the frictional force at the interface was 10 N, how much work was done to the box?
Tuesday, July 7, 2015 by Mary

Physics
Find the tension in each of the two ropes supporting a hammock if the first one is at an angle of 19.4° above the horizontal and the second is at an angle of 35.3° above the horizontal. The person sleeping in the hammock (unconcerned about tensions and ropes) has a ...
Tuesday, July 7, 2015 by Tesia

physics 1401!
A closed-end tube is evacuated and placed with its open end beneath the surface of a reservoir of water. The water rises to a height of 9.5 m. If the density of water is 1000 kg/m^3, what is the pressure at the bottom of the column of water?
Tuesday, July 7, 2015 by christine

physics
A 0.700 kg object is swung in a circular path and in a vertical plane on a 0.550 m length string. If the angular velocity at the bottom is 12.00 rad/s, what is the tension in the string when the object is at the bottom of the circle?
Tuesday, July 7, 2015 by jessica

physics 1401!
in a capillary tube with radius of .0008 m, a liquid of density 800 kg/m^3 and surface tension of 0.038 N/m in rising makes a contact angle of 60 with the tube wall. To height does the liquid rise?
Tuesday, July 7, 2015 by jcarrington

physics 1401!!!
A 2000-kg car rounds an unbanked curve with a radius of 45 m at a speed of 15 m/s. What minimum coefficient of friction must exist between the road and tires to prevent the car from slipping? (g = 9.8 m/s2)
Monday, July 6, 2015 by help me plzz (:

physics 20
Jack the Jaguar can run for only 1.0 min at 13.0m/s before he has to stop to rest, while Zeke the zebra can gallop at 7.25m/s for 5.0 min. How long does Zeke actually have to run for to elude Jack? Can Jack catch Zeke for lunch if they are initially 350m apart?
Monday, July 6, 2015 by ran

physics 20
Mr. Smith is standing 50m from a large bell. With his mighty throwing arm, Mr.Smith throws a rock at the bell and he hears the sound of the bell 4.5s later. If the speed of sound is 330 m/s, what was the speed of the rock in the air?
Monday, July 6, 2015 by ran

Physics
Suppose the graph of displacement vs. time produced by the ball's motion is: y = 1.56t^2 + 1.04t + 8.11 What is the magnitude of the acceleration of this object?
Monday, July 6, 2015 by Sara

Physics
An automobile with 0.300 m radius tires travels 75,000 km before wearing them out. How many revolutions do the tires make, neglecting any backing up and any change in radius due to wear?
Monday, July 6, 2015 by Karina

Physics
The existence of the planet Pluto was proposed based on irregularities in Neptune's orbit. Pluto was subsequently discovered near its predicted position. But it now appears that the discovery was fortuitous, since Pluto is small and the irregularities in Neptune's ...
Monday, July 6, 2015 by Karina

Physics
At takeoff a commercial jet has a 65.0 m/s speed. Its tires have a diameter of 0.700 m. (a) At how many rpm are the tires rotating? Incorrect: Your answer is incorrect. rpm (b) What is the centripetal acceleration at the edge of the tire? Incorrect: Your answer is incorrect. m...
Monday, July 6, 2015 by Karina

physics
In all parts: assume the the air temperature is 17.8o C, so the speed of sound in air is 342.0 m/s. Part A. Suppose a ship's foghorn is sounded toward an iceberg, and an echo is heard 6.16 s later. Find the distance from the ship to the iceberg. d = ? m Part B. b) Suppose ...
Monday, July 6, 2015 by Claudia

Physics
A 2.50 kg fireworks shell is fired straight up from a mortar intending to reach 110m. How much downward force is created to propel that shell upwards to it's intended target?
Monday, July 6, 2015 by Mark

physics
At sea level, the atmospheric pressure is 1.04×10 to the power 5 pa.Assuming g=10ms sq and density of air to be uniform and equal 2 1.3kg m cube find the height of the atmosphere.
Monday, July 6, 2015 by alvin

physics
A spring 30mm by a force of 15N calculate the workdone by the force
Monday, July 6, 2015 by chidolsky

Physics
A small block slides along the inside of a hemispherical bowl of radius r = 41.4 cm. When the block is at an angle of θ = 62.3° above the lowest point, it is sliding down with a speed of v = 3.02 m/s and speeding up at a rate of 3.54 m/s2. Find the coefficient of ...
Monday, July 6, 2015 by Roman

Physics
Engineering a highway curve. If a car goes through a curve too fast, the car tends to slide out of the curve. A frictional force acts on a fast car to oppose the tendency to slide out of the curve. Consider a circular curve of radius R and bank angle θ, where the ...
Monday, July 6, 2015 by Natalia

physics
A rifle fires a 2.11 10-2-kg pellet straight upward, because the pellet rests on a compressed spring that is released when the trigger is pulled. The spring has a negligible mass and is compressed by 8.37 10-2 m from its unstrained length. The pellet rises to a maximum height ...
Sunday, July 5, 2015 by Lola

Physics
You are watching your friend play hockey. In the course of the game, he strikes the puck in such a way that, when it is at its highest point, it just clears the surrounding 2.96 m high Plexiglas wall that is 14.5 m away. (Ignore any effects due to air resistance.) (a) Find the...
Sunday, July 5, 2015 by Sam

physics
How mush force must be exerted at an angle of 45 to top of a table to push along a weight when the frictional resistance to be overcome is a force of 2kg. Force is given in kg so i understand like this: N=kg.m/s^2 so the force in N is such when applied to 2kg mass gives unit ...
Sunday, July 5, 2015 by jzee11

physics
An 0.90 kg object is attached to one end of a spring, and the system is set into simple harmonic motion. The displacement x of the object as a function of time is shown in the drawing. With the aid of these data, determine the following values. I got a,b,d,e right. for C, I ...
Saturday, July 4, 2015 by Lola

physics
When responding to sound, the human eardrum vibrates about its equilibrium position. Suppose an eardrum is vibrating with an amplitude of 5.60 10-7 m and a maximum speed of 2.82 10-3 m/s. I don't see how A and a, is given. =/
Saturday, July 4, 2015 by Lola

physics
A hand exerciser utilizes a coiled spring. A force of 82.0 N is required to compress the string by 0.0191 m. Determine the force needed to compress the spring by 0.0520 m.
Saturday, July 4, 2015 by Lola

Physics
A stone is thrown upwards from the roof with a velocity 15ms^-1 at an angle 30degree to the horizontal. The height of the building is 40m.calculate the magnitude of the velocity of the stones before it strikes the ground
Saturday, July 4, 2015 by Lynn

physics
Draw a diagram to scale showing the direction in which a man must row across a river in order to reach a point directly opposite, if he rows 3 mile/hr while the speed of current is 2 mile/hr. My ans- with angle of 33' with straight line he wants to travel. And V=3.6 mile/...
Saturday, July 4, 2015 by jzee11

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