Sunday
August 28, 2016

Homework Help: Science: Physics

Recent Homework Questions About Physics

Physics current directions
I need help In studying the cross section of a straight current carrying wire, you notice that the magnetic field lines run counter-clockwise. What is the direction of the current in the wire and how do you know? 2. You are looking into a current carrying solenoid and notice ...
Wednesday, March 16, 2016 by Matt Damon

Physics
The exact mass of the moon was not determined until the Apollo lunar orbiter went into orbit around the moon. They used the period and the orbital radius to find the mass. But since you already know the mass of the moon, if the spaceship was orbiting 485 km above the surface ...
Wednesday, March 16, 2016 by Ron

physics
A concave spherical mirror forms an inverted image different in size from the object by a factor a > 1. The distance between object and image is d. Find the focal length of the mirror. (Use any variable or symbol stated above as necessary.) (b) Suppose the mirror is convex...
Wednesday, March 16, 2016 by Anonymous

Physics
Calculate the force needed to bring a 1100–kg car to rest from a speed of 83.0 km/h in a distance of 118 m (a fairly typical distance for a non-panic stop). Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 1.82 m. Calculate the ...
Wednesday, March 16, 2016 by Emiliee

Physics
When an 81.6 kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.14E+3 J. By how much does the potential energy of a 18.6 kg child increase when the child climbs a normal staircase to the second floor? I...
Wednesday, March 16, 2016 by Emiliee

Physics
How can you figure out the work done by the frictional force if the friction is 80 Newtons against a horizontal force of 290 newtons. Is it simply subtracting 290 - 80 = 210?
Wednesday, March 16, 2016 by Marie

physics
If I solved for centripetal acceleration how can you determine the magnitude of the force required to produce this centripetal acceleration? Next step please.... v=15m/s r=35m m=1300 kg 15 squared/35m=225/35= 6.43m/s squared
Wednesday, March 16, 2016 by Marie

Physics
A flywheel rotates
Wednesday, March 16, 2016 by Aditya

physics
A car of mass 1400kg moving south at 11m/s collides into another car of mass 1800kg moving east at 30m/s.The cars are stock together after the collision.Determine the velocity of the cars immediately after the collision.
Wednesday, March 16, 2016 by Pihu

physics
compute the mass of the following assuming if it to be a sphere of radius 6370km
Wednesday, March 16, 2016 by daniel

Physics
The force between two identical charges separated by 1 cm is equal to 90 N. What is the magnitude of the two charges?
Wednesday, March 16, 2016 by Anonymous

Physics
Ball A is attached to a string of length l=13.4 m and is released from rest. Ball B is released from rest and falls straight down. Which of the following statements for what happens at point P are correct, and which are incorrect? Explain your reasoning and state what is wrong...
Wednesday, March 16, 2016 by Supansa

Physics
A pinball machine has balls of mass 134 g. The springs have a spring constant of 93.4N/m and a relaxed length of 10 cm. To what length must the spring be compressed if it is to give a ball a speed of 2.0 m/s?
Tuesday, March 15, 2016 by Supansa

Physics
What is the potential energy of the Earth, considered as an object orbiting the Sun? Compare your result with the kinetic energy of the Earth in its orbit. Given Earth mass = 6.34×1024kg , Sun mass =1.934×1030kg, and distance from the Earth to the Sun =1.434×...
Tuesday, March 15, 2016 by Supansa

11th grade physics
Two point charges q and q' are placed respectively at two points A and B. Let O be the midpoint of [AB]. Charge q placed at A creates at O an electric field of strength E=9×10^6 V/m. Determine the resultant electric field at O when:  a) q'=q  ...
Tuesday, March 15, 2016 by vicky

Physics
someone swings a bucket of water in a vertical circle. Describe the water's motion to another person? or How would you? & also how to explain the motion of the water to them? How come the water didn't fall on the persons head?
Tuesday, March 15, 2016 by Adam

Physics
Suppose a 300–g kookaburra (a large kingfisher bird) picks up a 84.0–g snake and raises it 2.30 m from the ground to a branch. How much work did the bird do on the snake? How much work did it do to raise its own center of mass to the branch?
Tuesday, March 15, 2016 by Em

11th grade physics
Two point charges q and q' are placed respectively at two points A and B. Let O be the midpoint of [AB]. Charge q placed at A creates at O an electric field of strength E=9×10^6 V/m.  Determine the resultant electric field at O when:  a) q'=q  ...
Tuesday, March 15, 2016 by vicky

Physics
I want to know the reasoning behind each answer as well cause I have the answers, I want to know why and how to do the answers as well :) A parachutist jumps from a height of 3.1 × 10[Power 3] m and falls freely for 10 s. She then opens her parachute, and for the next ...
Tuesday, March 15, 2016 by lomonoyan

physics
Women and overweight people often experience backpain. Let us explore the reason for this. Assume the women has a weight of 60.0 daN before pregnancy. Suppose she gains 10.0 daN during pregnancy, due to weight of the fetus, placenta, amniotic fluid, etc. To make the ...
Tuesday, March 15, 2016 by jessica

11th grade physics
Two point charges q and q' are placed respectively at two points A and B. Let O be the midpoint of [AB]. Charge q placed at A creates at O an electric field of strength E=9×10^6 V/m. Determine the resultant electric field at O when: a) q'=q b) q'=-q
Tuesday, March 15, 2016 by vicky

11th grade physics
Multiple choice (show your work if any):  1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart.   The electric field is null at a point C outside [AB] such that :  a) AC=50cm b) AC=30cm c) AC=20cm d) ...
Tuesday, March 15, 2016 by vicky

Science: Physics
mr. slott at his fighting weight of 1000N jumps down from a platform meters above a trampoline with a spring constant (k) of 500N/M. How much does Mr.Slott strech the trampoline (x) before it brings him to a stop
Tuesday, March 15, 2016 by James

Physics
Kim(55 kg) has been wondering about the normal force. (a) How many helium balloons would it take to reduce her normal force by 50% if helium has a lifting force of 1.0 gram per liter. She estimates that a balloon contains about 5.0 liters of helium. (b) How many helium ...
Tuesday, March 15, 2016 by Next

Physics
A pinball machine has balls of mass 134 g. The springs have a spring constant of 93.4N/m and a relaxed length of 10 cm. To what length must the spring be compressed if it is to give a ball a speed of 2.0 m/s?
Tuesday, March 15, 2016 by Supansa

Physics
What is the potential energy of the Earth, considered as an object orbiting the Sun? Compare your result with the kinetic energy of the Earth in its orbit. Given Earth mass = 6.34×1024kg , Sun mass =1.934×1030kg, and distance from the Earth to the Sun =1.434×...
Tuesday, March 15, 2016 by Supansa

PHYSICS
Object A experiences a gravitational force due to object B. How would that force change if the separation distance is halved, mA triples, and mB is reduced to one quarter of its original value?
Tuesday, March 15, 2016 by Jen

Physics
A car of mass 422 kg is moving 36.0° North of East at a speed of 15.4 m/s. What is the magnitude of the momentum of the car? (magnitude - how big is it? ignore direction). What is the east-west component of the momentum of the car? I already figured out the first question ...
Tuesday, March 15, 2016 by Emily

Physics
A car of mass 422 kg is moving 36.0° North of East at a speed of 15.4 m/s. What is the magnitude of the momentum of the car? (magnitude - how big is it? ignore direction)
Tuesday, March 15, 2016 by Emily

physics 2
A 12.9 gram sample of an unknown metal at 26.5°C is placed in a Styrofoam cup containing 50.0 grams of water at 88.6°C. The water cools down and the metal warms up until thermal equilibrium is achieved at 87.1°C. A 10 percent of heat lost by water is transferred ...
Tuesday, March 15, 2016 by Ehab

physics 2
A 12.9 gram sample of an unknown metal at 26.5°C is placed in a Styrofoam cup containing 50.0 grams of water at 88.6°C. The water cools down and the metal warms up until thermal equilibrium is achieved at 87.1°C. A 10 percent of heat lost by water is transferred ...
Tuesday, March 15, 2016 by Ehab

physics
the temperature of 500g of a certain metal is raised to 100 degre celcius and it is then placed in 200g of water at 15 degre celcius.if the final steady temperature raises to 21 degre celcius,calculate the specific heat capacity of the metal
Tuesday, March 15, 2016 by Anonymous

Physics
If the air temperature is the same as the temperature of your skin (about 30.0 oC), your body cannot get rid of heat by transferring it to the air. In that case, it gets rid of the heat by evaporating water (sweat). During bicycling, a typical 70.0kg person's body produces...
Monday, March 14, 2016 by Desperate Student

Physics
A nail driven into a board increases in temperature. If we assume that 88.6 % of the kinetic energy delivered by a 2.3-kg hammer with a speed of 7.80 m/s is transformed into heat that flows into the nail and does not flow out, what is the temperature increase in K of an 272 g ...
Monday, March 14, 2016 by Desperate Student

Physics
A copper cylinder is initially at 20.0 oC. At what temperature in oC will its volume be 0.39 % larger than it is at 20.0 oC? The linear coefficient of expansion of copper is 28.6x10-6¢XC-1
Monday, March 14, 2016 by Desperate Student

Physics
A small 0.13 g bug stands at one end of a thin uniform bar that is initially at rest on a smooth horizontal table. The other end of the bar pivots about a nail driven into the table and can rotate freely, without friction. The bar has mass 0.3 g and is 2.49 cm in length. The ...
Monday, March 14, 2016 by Desperate Student

Physics
An airplane propeller is 1.1 m in length (from tip to tip) and has a mass of 2.8 kg . When the airplane's engine is first started, it applies a constant torque of 8.1 N⋅m to the propeller, which starts from rest. What is the angular acceleration of the propeller? ...
Monday, March 14, 2016 by Desperate Student

Physics
A uniform disk with mass 6 kg and radius 1.8 m is pivoted at its center about a horizontal, frictionless axle that is stationary. The disk is initially at rest, and then a constant force 31.5N is applied to the rim of the disk. The force direction makes an angle of 35 degree ...
Monday, March 14, 2016 by Desperate Student

Physics
The mass of a star is 1.89·1031 kg and it performs one rotation in 28.9 days. Find its new period (in /days) if the diameter suddenly shrinks to 0.93 times its present size. Assume a uniform mass distribution before and after.
Monday, March 14, 2016 by Bristol

AP Physics
At their closest approach, Venus and Earth are 4.2x10^10m apart. The mass of Venus is 4.87x10^24kg, the mass of Earth is 5.97x10^24kg, and G=6.67x10^-11Nm2/kg2. What is the force exerted by Venus on Earth at that point?
Monday, March 14, 2016 by Anonymous

physics
A 313 μF defibrillator capacitor is charged to 4.94×103 V. When fired through a patients chest, it loses 95 % of its charge in 40 ms. What is the resistance of the patients chest?
Monday, March 14, 2016 by shawn

Calc/Physics
Find the following questions at the depth of 25\text{m}. The gravitational acceleration is g = 9.8\text{m/s}^2 and the density of water is \rho = 1000\text{kg/m}^3. a. Find the hydrostatic force on a square steel plate with sides 2\text{m} placed horizontally. Answer (in ...
Monday, March 14, 2016 by Paul

Physics
A 313 μF defibrillator capacitor is charged to 4.94×103 V. When fired through a patients chest, it loses 95 % of its charge in 40 ms. What is the resistance of the patients chest?
Monday, March 14, 2016 by Anon

Physics HW Plz help
What is the frequency of a blue light with a wavelength of 487nm?
Monday, March 14, 2016 by Student Lexi

Physics
Women and overweight people often experience backpain. Let us explore the reason for this. Assume the women has a weight of 60.0 daN before pregnancy. Suppose she gains 10.0 daN during pregnancy, due to weight of the fetus, placenta, amniotic fluid, etc. To make the ...
Monday, March 14, 2016 by vanessa

Physics
A train moving at a constant speed of 100km/h travels east for 40min, then 30o east of north for 20 min, and finally west for 30min. What is the train's average velocity for the trip? The answer is 30 km/h (E 40 N) but I keep getting 66.6 km/h (E 30 N) help please!
Monday, March 14, 2016 by lomonoyan

11th grade physics
Multiple choice (show your work if any):  1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C of [AB] such that :  a) AC=50cm b) AC=10cm c) AC=20cm d) point C ...
Monday, March 14, 2016 by vicky

Physics
A car starts from rest accelerate uniformly until it reaches a velocity of 30m/s after 5s.it traves with uniform velocity for 15s and is being brought to rest in 10 with a uniform retardation.dEtermine the following (a) the acceleration of the car.(b) the retardation. (c) the ...
Monday, March 14, 2016 by Omotola

About Drama
1. Which of these sentences is using appositive phrase correctly? a. The Grand Canal, which is the oldest man-made waterway in the world, is still used today in China. **?? b. The Grand Canal in China is a man-made waterway, still used, that is the oldest in the world. c. The ...
Monday, March 14, 2016 by Etta

11th Grade physics
Multiple choice (show your work if any):  1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C of [AB] such that :  a) AC=50cm b) AC=10cm c) AC=20cm d) point C ...
Monday, March 14, 2016 by vicky

physics 11th class
Calculate the power of a crane in watts which lifts a man of 100kg to a height of 10m in 20sec
Monday, March 14, 2016 by Naman

Physics
What amount of energy is needed to change 1 kg of O degrees Celsius ice to 10 degrees Celsius water?
Monday, March 14, 2016 by Logan

physics
Women and overweight people often experience backpain. Let us explore the reason for this. Assume the women has a weight of 60.0 daN before pregnancy. Suppose she gains 10.0 daN during pregnancy, due to weight of the fetus, placenta, amniotic fluid, etc. To make the ...
Monday, March 14, 2016 by tom

physics
After placing a 0.500 m dent in the landlords van, the two management students are told they and their 200 daN beer freezer have to go. The new ramp is inclined at an angle of 32.1 o relative to the horizontal. The coefficient of static friction between the freezer and the ...
Monday, March 14, 2016 by tom

11th grade physics
Multiple choice (show your work if any): 1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C of [AB] such that : a) AC=50cm b) AC=10cm c) AC=20cm d) point C doesn't ...
Monday, March 14, 2016 by vicky

physics
A 13 gram sample of an unknown metal at 26.5°C is placed in a Styrofoam cup containing 50.0 grams of water at 88.6°C. The water cools down and the metal warms up until thermal equilibrium is achieved at 87.1°C. A 10 percent of heat lost by water is transferred ...
Monday, March 14, 2016 by Ehab

physics
figure 3.1 shows a rectangular concrete slab of weight 18000N. It rests on a brick wall and is the roof of a bus shelter. The concrete slab is 3.0 m wide. The wall is 2.5 m from the front of the concrete slab and 0.50 m from the back. The cables behind the shelter pull ...
Monday, March 14, 2016 by Atta

Physics
A concrete slab of mass 400 kg accelerates down a concrete slop inclined at 35degree. The kenetic friction b/n the slab and slope is 0.60.Determine the acceleration of block.
Monday, March 14, 2016 by Yaekob

physics
find the angle of projection at the horizontal range is twice the maximum height of a projecyile
Monday, March 14, 2016 by junoo

physics
When the ray of light travels from air to glass slab and strikes the surface of separation at 90 degree , then it ..........
Monday, March 14, 2016 by rohit

Physics
A 5000-Hz car horn is blasted while the car is moving at 35.0 m/s toward a dazed physics student (stationary). What is the frequency of the horn heard by the student. Assume the temperature is 0°C
Sunday, March 13, 2016 by Sneha

Physics
An airplane has a velocity of v=(5m/s)i + (4m/s)j at t1= 3s. For the time interval from t1=3 seconds to t2=13s the average acceleration is a= (.5m/s^2)i + (.2m/s^2)j. At 13s find the magnitude and direction of the velocity of the airplane.
Sunday, March 13, 2016 by Bobby

Physics
A grizzly bear is running at a speed of 25m/s with respect to a man. The man is running 20m/s with respect to a rock. What is the bears speed with respect to the rock. (ALL VELOCITIES ARE IN THE SAME DIRECTION AND POSITIVE)
Sunday, March 13, 2016 by Bobby

Physics
The size of Rutherford's atom is about 0.1 nm. (a) Calculate the attractive electrostatic force between an electron and a proton at that distance. (b) Calculate the electrostatic potential energy of that atom. Express the result in unit eV. (c) The size of Rutherford's...
Sunday, March 13, 2016 by Clara

Physics
What is the wavelength of light that can cause a transition of an electron in the hydrogen atom from the orbit with n = 6 to n = 8?(answer in µm)
Sunday, March 13, 2016 by Clara

Physics
The size of Rutherford's atom is about 0.1 nm. (a) Calculate the speed of an electron that moves around a proton, based on their electrostatic attraction, if they are separated by 0.1 nm. (answer in m/s) (b) Calculate the corresponding de Broglie wavelength for Rutherford...
Sunday, March 13, 2016 by Eduardo

Physics
How much energy is required to ionize hydrogen when it is in the state with n = 6? (answer in eV)
Sunday, March 13, 2016 by Eduardo

PHYSICS
Calculate for Bohr's atomic model the speed of the orbiting electron in the n = 7 state. (Answer in m/s)
Sunday, March 13, 2016 by Physics Lover

All about DRAMA! P.S. - Please check!
1. Which of these sentences is using appositive phrase correctly? a. The Grand Canal, which is the oldest man-made waterway in the world, is still used today in China. b. The Grand Canal in China is a man-made waterway, still used, that is the oldest in the world. c. The Grand...
Sunday, March 13, 2016 by Etta

physics
a horizontal spring is stretched from its equilibrium position when a force of 0.75kg acts on it. then a force of 1.5 kg is attached to the end of the end of the spring and pulled 4.5 cm along a frictionless table from the equilibrium position. the body is then released and ...
Sunday, March 13, 2016 by charles anderson

physics
After placing a 0.500 m dent in the landlords van, the two management students are told they and their 200 daN beer freezer have to go. The new ramp is inclined at an angle of 32.1 o relative to the horizontal. The coefficient of static friction between the freezer and the ...
Sunday, March 13, 2016 by tom

physics
Women and overweight people often experience backpain. Let us explore the reason for this. Assume the women has a weight of 60.0 daN before pregnancy. Suppose she gains 10.0 daN during pregnancy, due to weight of the fetus, placenta, amniotic fluid, etc. To make the ...
Sunday, March 13, 2016 by tom

Physics
A roadway for stunt drivers is designed for race cars moving at a speed of 95 m/s. A curved section of the roadway is a circular arc of 760 m radius. The roadway is banked so that a vehicle can go around the curve with the friction force from the road equal to zero. At what ...
Sunday, March 13, 2016 by SJ

Physics
A grizzly bear is running at a speed of 25m/s with respect to a man. The man is running 20m/s with respect to a rock. What is the bears speed with respect to the rock. (ALL VELOCITIES ARE IN THE SAME DIRECTION AND POSITIVE)
Sunday, March 13, 2016 by Bobby

Physics
An airplane has a velocity of v=(5m/s)i + (4m/s)j at t1= 3s. For the time interval from t1=3 seconds to t2=13s the average acceleration is a= (.5m/s^2)i + (.2m/s^2)j. At 13s find the magnitude and direction of the velocity of the airplane.
Sunday, March 13, 2016 by Bobby

Physics
Two metallic spheres of mass .001 kg hang from a point by .3 m strings. Each is given the same amount and sign of charge. After equilibrium is reached, they each make an angle of 20 degrees relative to the vertical. Determine the amount of charge in each sphere.
Sunday, March 13, 2016 by Robert

Descriptive Physics
You are standing 5 feet from one speaker and 14 feet from another. Both speakers are producing the same sound. If the combined sound from both speakers is especially loud at your location, which of the following could be the wavelength of the sound? Choose all that apply. 1 ...
Sunday, March 13, 2016 by Thomas

Physics
A falling rock has a speed of 1.5 m/s. What is the velocity of the rock when it hits the ground 5 seconds later? Give the magnitude and direction
Sunday, March 13, 2016 by Bob

Physics
In a double-slit experiment, the fourth-order maximum for wavelength of 450 nm occurs at an angle theta = 90. Thus it is on the verge of being eliminated from the pattern because theta cannot exceed 90. (a) What range of wavelengths in the visible range (400-700 nm) are not ...
Sunday, March 13, 2016 by Kristie

Physics
A body of mass 10g oscillates with Simple Harmonic Motion of amplitude 4cm and time period 0.50s. Calculate: a) The maximum acceleration. b) The maximum kinetic energy.
Sunday, March 13, 2016 by Alex

Physics
If the length of pendulum is 0.8+/-0.01m and time peroid is 2.5+/-0.012 sec. Then percentage error in acceleration due to gravity will be
Sunday, March 13, 2016 by Anonymous

physics
The threshold wavelength for photoelectric emission in metal is 600 nm.Find the maximum kinetic energy of the electrons emitted when it is exposed to the wavelength 200 nm
Sunday, March 13, 2016 by Anonymous

physics
a ball of mass 0.1 is thrown up with an initial velocity of 80m/s calculate the potential energy half way up
Sunday, March 13, 2016 by junoo

Physics
A partide of mass m moves along a trajectory given by x= a cos δ1 t and y = asinδ2 t . Find rand y component of the force acting on the patde, potential energy, kinetic enenev of the partide and hence show that the total energe E= KE + PE =1/2 m(a*2 δ1*2+ b*2 &#...
Sunday, March 13, 2016 by jojo

Physics
A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of the ring. The ring ...
Sunday, March 13, 2016 by jojo

Physics
What is the difference between gravitational potential energy and electric potential energy?
Sunday, March 13, 2016 by MeritGodwin

Physics
A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of the ring. The ring ...
Sunday, March 13, 2016 by jan

Physics
A partide of mass m moves along a trajectory given by x= a cos δ1 t and y = asinδ2 t . Find rand y component of the force acting on the patde, potential energy, kinetic enenev of the partide and hence show that the total energe E= KE + PE =1/2 m(a*2 δ1*2+ b*2 &#...
Sunday, March 13, 2016 by jan

physics
determine the kinetic energy of a boy mass 40kg running with velocity of 3m/s
Sunday, March 13, 2016 by energy

Physics
You stand on a frictionless platform that is rotating with an angular speed of 3.9 rev/s.Your arms are outstretched, and you hold a heavy weight in each hand. The moment of inertia of you, the extended weights, and the platform is 7 kg · m2. When you pull the weights in...
Sunday, March 13, 2016 by Luhan

Physics
A woman with mass of 57 kg stands at the rim of a horizontal table having a moment of inertia of 570 kg m2 and a radius of 1.5 m.The turntable is initially at rest and is free to rotate about a frictionless, vertical axis through its center. The woman then starts walking ...
Sunday, March 13, 2016 by Luhan

Physics
A thin uniform cylindrical turntable of radius 2.1 m and mass 18 kg rotates in a horizontal plane with an initial angular speed of 8 rad/s. The turntable bearing is frictionless. A clump of clay of mass 5.5 kg is dropped onto the turntable and sticks at a point 0.9 m from the ...
Sunday, March 13, 2016 by Luhan

physics
a ball of mass 0.1kg is thrown vertically upwards with an initial velocity of 80m/s.calculate the potential energy (I) half way up (ii) at its maximum height.what is the kinetic energy as it leaves the ground
Sunday, March 13, 2016 by stephen

Physics
A non-reflecting single layer of a lens coating is to be deposited on a lens of refractive index n = 1.7. Determine the refractive index of a coating material and the thickness required to produce zero reflection for light of wavelength 540 nm.
Sunday, March 13, 2016 by Lowes

physics
Explain the difference between a GET and MOSFET on the basis of their construction and working
Sunday, March 13, 2016 by umesh

Physics
A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of the ring. The ring ...
Saturday, March 12, 2016 by fatma999

Physics
A partide of mass m moves along a trajectory given by x= a cos δ1 t and y = asinδ2 t . Find rand y component of the force acting on the patde, potential energy, kinetic enenev of the partide and hence show that the total energe E= KE + PE =1/2 m(a*2 δ1*2+ b*2 &#...
Saturday, March 12, 2016 by fatma999

Physics
A 1000kg car is driving toward the north along a straight horizontal road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest uniformly in a distance of 150 m. What is the magnitude applied to the car to bring it to rest?
Saturday, March 12, 2016 by Anonymous

Physics
Hi, I am having difficulties approaching and solving the following question: A Michelson interferometer is used with red light of wavelength 632.8 nm and is adjusted for a path difference of 20 µm. Determine the angular radius of the a) first (smallest diameter) ring ...
Saturday, March 12, 2016 by Brandon Tom

Physics
A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 4.8 m down a θ = 36° incline. The sphere has a mass M = 3.2 kg and a radius R = 0.28 m. If there is no frictional force, what is the translational kinetic energy of the ...
Saturday, March 12, 2016 by Kyle

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