Saturday

February 13, 2016
**physics**

A block of mass 0.941 kg is kept at rest as i compresses a horizontal mass-less spring (K=87.5 N/m) by 9.91 cm. As the block is released, it travels 0.528 m on a rough horizontal surface before stopping. The acceleration of gravity is 9.8 m/s^2. Calculate the coefficient of ...
*Saturday, November 28, 2015 by luma*

**physics**

A 72 kg man jumps fro a window 1.5 m above a sidewalk. The acceleration of gravity is 9.81 m/s^2. a) what is his speed just before his feet strike the pavement? Answer in units of m/s. b) If the man jumps with his knees and ankles locked, the only cushion for his fall is ...
*Saturday, November 28, 2015 by luma*

**physics**

An archer pulls her bowstring back 0.488 m by extending a force that increases uniformly from zero to 251 N. What is the equivalent spring constant of the bow? Answer in units of N/m. How much work does the archer do in pulling the bow? Answer in units of J.
*Saturday, November 28, 2015 by luma*

**physics**

An archer pulls her bowstring back 0.488 m by extending a force that increases uniformly from zero to 251 N. What is the equivalent spring constant of the bow? Answer in units of N/m.
*Saturday, November 28, 2015 by luma*

**physics**

On a frozen pond, a 10 kg sled is given a kick that imparts to it an initial speed of 6.2 m/s. The coefficient of kinetic friction between sled and ice is 0.14. Find the distance the sled moves before coming to rest. The acceleration of gravity is 9.8 m/s^2. Answer in units of m.
*Saturday, November 28, 2015 by luma*

**physics**

A 12 g bullet is accelerated in a rifle barrel 69.2 cm long to a speed of 864 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N.
*Saturday, November 28, 2015 by luma*

**physics**

A 2.25 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 19.6 N. Find the speed of the block after it has moced 4.72 m. Answer in units of m/s.
*Saturday, November 28, 2015 by luma*

**Physics**

The block shown in (Figure 1) has mass m = 7.0 kg and lies on a fixed smooth frictionless plane tilted at an angle θ = 22.0 ∘ to the horizontal. If the block starts from rest 15.2 m up the plane from its base, what will be the block's speed when it reaches the ...
*Saturday, November 28, 2015 by Simone*

**Physics**

A river flows toward the East at 1.5 m/s. Steve can swim 2.2 m/s in still water. If he wishes to cross the river so that his direction is northward, what direction relative to the water must he swim?
*Saturday, November 28, 2015 by Al Hasiff*

**Physics **

Alex comes across a deep ravine. She was planning on this as she packed a 3.8 m portable telescoping extension ladder. It has a mass of 15 kg. She was told that in order to get to the skull’s last known location, she must get across this 2 m gap. ------- | \3.8m | \ _|_2m...
*Saturday, November 28, 2015 by colcol*

**College Physics**

A 0.60 kg mass is attached to a 0.6 m string and displaced at an angle of 15 degrees before it is released. 1)What is the potential energy of the pendulum? 2) What is the angular frequency of the pendulum? What is the height of its displacement? 4) What is the velocity of the ...
*Friday, November 27, 2015 by Jose Luis*

**College Physics**

A 0.60 kg mass is attached to a 0.6 m string and displaced at an angle of 15 degrees before it is released. 1)What is the potential energy of the pendulum? 2) What is the angular frequency of the pendulum? What is the height of its displacement? 4) What is the velocity of the ...
*Friday, November 27, 2015 by Jose Luis*

**physics**

a body of mass 5kg falls from a height of 10m above the ground. what is the kinetic energy of the body just before it strikes the ground answers K.E =1/2mg'2
*Friday, November 27, 2015 by richie*

**physics**

If 0.055 kg of ice at 0 ∘C is added to 0.330 kg of water at 32 ∘C in a 0.100-kg aluminum calorimeter cup, what is the final temperature of the water?
*Friday, November 27, 2015 by noel*

**physics**

A laser with a power output of 2 mW at a wavelength of 400 nm is projected onto a calcium metal surface. What power is carried away by the electrons? The binding energy of the metal is 2.31 eV.
*Friday, November 27, 2015 by carolyn*

**physics**

On its highest power setting, a microwave oven increases the temperature of 0.400 kg of spaghetti by 45.0 °C in 120 s. The specific heat of spaghetti is 3760 J/kg °C and the microwaves are absorbed over a circular area 20.0 cm in diameter. What is the peak electric ...
*Friday, November 27, 2015 by carolyn*

**physics**

A severely myopic patient has a far point of 5.00 cm. By how many diopters should the power of his eye be reduced in laser vision correction to obtain normal distant vision for him? Assume the image at the back of the eye is formed 0.2 m from the eye's lens.
*Friday, November 27, 2015 by carolyn*

**Physics**

A 0.60 kg mass is attached to a 0.6 m string and displaced at an angle of 15 degrees before it is released. 1)What is the potential energy of the pendulum? 2) What is the angular frequency of the pendulum? What is the height of its displacement? 4) What is the velocity of the ...
*Friday, November 27, 2015 by Jose Luis*

**Physics**

What is the difference between Electro-Motive-Force and Potential-Difference?
*Friday, November 27, 2015 by Joe*

**Physics**

A 0.60 kg mass is attached to a 0.6 m string and displaced at an angle of 15 degrees before it is released. 1)What is the potential energy of the pendulum? 2) What is the angular frequency of the pendulum? What is the height of its displacement? 4) What is the velocity of the ...
*Friday, November 27, 2015 by Jose Luis*

**Physics**

Water enters a pipe with a cross sectional area of 3.0 cm^2 with a velocity of 3.0 m/s. The water encounters a constriction where its velocity is 15 m/s. What is the cross sectional area of the constricted portion of the pipe?
*Friday, November 27, 2015 by Jose Luis*

**science**

I did a physics experiment and now i need help with the matlab fit. can someone tell me how to do this fit in matlab? a1*[sin(a2(x-a3))/(a2(x-a3)]^2*[cos(a4(x-a3))]^2 i have a program that fits a graph to a function i just ask how to write this function.
*Friday, November 27, 2015 by henry*

**physics**

a beam of electron 13.0 ev is used to bombard gaseous hydrogen. what series of wavelengths will be emitted?
*Friday, November 27, 2015 by ameer mukhtar *

**Physics**

A nonuniform cylinder (radius = 0.14 m, center-of-mass rotational inertia = 2.21×10^-2 kg·m^2, mass = 1.36 kg) starts from rest and rolls without slipping down a plane with an angle of inclination of 24.0 degrees. How long does it take to travel 1.72 m along the ...
*Friday, November 27, 2015 by Skippy*

**Physics**

A block with a mass m = 3.50 kg sits on a surface with a coefficient of static friction µs = 0.520. A spring with spring constant k = 75.0 N/m is hooked onto the block, and is slowly pulled horizontally, gradually stretching the spring. (a) When the spring is stretched ...
*Thursday, November 26, 2015 by Jade*

**physics**

Determine if the tow truck below must use mode 4 drive streets to climb the slope and the weight of the tow car is 3500kg weight of the car is 1800kg Coefficient of friction between the tires and the roadway is 0.3
*Thursday, November 26, 2015 by Gene*

**physics**

A car of mass 800kg is climbing an incline at 10 degrees to the horizontal. Determine the increase in potential energy of the car mass s it moves a distance of 50m up the incline
*Thursday, November 26, 2015 by Kyle*

**physics**

frictional force
*Thursday, November 26, 2015 by tolahun*

**Physics**

Joan comes across a deep ravine. She was planning on this as she packed a 3.8 m portable telescoping extension ladder. It has a mass of 15 kg. She was told that in order to get to the skull’s last known location, she must get across this 2 m gap. --- | \3.8m | \ __|_2m\...
*Thursday, November 26, 2015 by Lilly *

**Physics**

A spring has a spring constant that is 120 N/m, and has a 0.1 kg block attached to it. The spring and mass sit on a horizontal surface that has no friction. The block is pulled 0.2 m and then released. Please find the frequency of the oscillations, the period of the ...
*Thursday, November 26, 2015 by Jose Luis*

**physics**

A stretched string of length 168 cm vibrates in its nth mode. The separation distance from node to antinode is 21 cm . What is the value of n?
*Thursday, November 26, 2015 by Elia*

**physics**

Engine oil (η = 0.20 Pa⋅s) passes through a fine 2.60-mm-diameter tube that is 8.60 cm long. What pressure difference is needed to maintain a flow rate of 7.8 mL/min ? So what i did was (7.8Ee-3 /60) = π P (1.3e-3) ^4 /(8* 0.086*0.2) I get 1.99E5 but its not ...
*Wednesday, November 25, 2015 by arshi*

**physics**

A scuba tank, when fully submerged, displaces 15.7 L of seawater. The tank itself has a mass of 13.9 kg and, when "full," contains 3.20 kg of air. The density of seawater is 1025 kg/m3. Assume that only its weight and the buoyant force act on the tank. Determine the ...
*Wednesday, November 25, 2015 by arshi*

**physics**

A typical red blood cell has a mass of 3.0 10-16 kg. A blood sample placed in a centrifuge is subjected to a force of 4.6 10-11 N when the centrifuge is operated at 138 rev/s. What is the diameter of the centrifuge?
*Wednesday, November 25, 2015 by Yaacov*

**physics**

How does the concept of resonance work?
*Wednesday, November 25, 2015 by Emma*

**Physics**

Alex is exploring a cave that has a slight incline and is iced over, forcing her to use ice cleats to explore it. After climbing 50 m into the cave, she finds what she is looking for and she takes out her ice pick and hammer to begin removing the stones. Little does she know ...
*Wednesday, November 25, 2015 by cocol*

**Physics**

The asteroid EROS has a mass of 7.4x10+15kg. A 103kg astronaut stands on the surface, 33km from the centre of the asteroid. What weight does she experience ? Give your answer in Newtons. Take the Gravitational constnat, G, to be 6.67x10-11.
*Wednesday, November 25, 2015 by Bill Nye*

**Physics**

How does using the concept of resonance determine the speed of sound an in experiment? In other words, I'm wondering how the concept of resonance works
*Wednesday, November 25, 2015 by Emma*

**physics**

Explain two different reasons why fibreglass is used to fill the space between the concrete block and the metal casing.
*Wednesday, November 25, 2015 by Fernando Guo*

**Physics**

What is the mass of a copper wire that will give a wire, 0.20mm in diameter, a resistance of 400 ohms can you please show me the formulas
*Wednesday, November 25, 2015 by John*

**Physics**

In a container of negligible mass, 0.100 kg of steam at 110°C and atmospheric pressure is added to 1.00 kg of water at 20.0°C. (a) If no heat is lost to the surroundings, what is the final temperature of the system? (b) At the final temperature, how many kg of steam ...
*Wednesday, November 25, 2015 by Margret*

**Physics**

Three charges are located along the x axis as shown in the drawing. The mass of the -1.2 uC is 4.0×10^-9 kg. Determine the magnitude and direction of the acceleration of the -1.2 uC charge when it is allowed to move if the other two charges remain fixed. I need help ...
*Wednesday, November 25, 2015 by John*

**Physics**

a 0.15 kg sample of Alloy is heated 540°C. it is then quickly placed in 400 g of H2O at 10°C which is contain in a 200 g aluminum cup. the final temperature of the mixture is 20. 5 °C. calculate the specific heat of alloy.
*Wednesday, November 25, 2015 by Gelo*

**Physics**

Draw areal velocity versus time graph for Mars.
*Wednesday, November 25, 2015 by Akshay*

**physics**

Shows three boxes connected by cords, one of which wraps over a pulley having negligible friction on its axle and negligible mass. The mass of the boxes are mA = 5 kg, mB = 2 kg, and mC = 3kg. When the system is released from rest, Calculate (a) the acceleration of the system ...
*Wednesday, November 25, 2015 by Jay*

**physics**

water and glass with refractive index of 1.5 are interfaced.if the incident ray are from the water makes an angle 60 degrees with the normal.find the direction of the reflected and refracted rays(given that refractive index of glass to water=1.33)
*Wednesday, November 25, 2015 by joe*

**PHYSICS**

a 72N force accelerates mass m, by 5.0 m/s^2 the same force acts on another mass m2 and imparts to it an acceleration of 20.0 m/s^2. what acceleration will the same force impart to the two masses when they are joined?
*Wednesday, November 25, 2015 by Camz*

**physics**

formular for looking maximum speed reached
*Wednesday, November 25, 2015 by mohamed*

**Physics**

In this sound interferometer, sound waves enter at A and travel to C via paths ABC and ADC. the intensity of the sound can be determined by the microphone placed at C. The length of the path ADC can be changed by a sliding tube. The frequency is fixed at a certain value and ...
*Wednesday, November 25, 2015 by Claudia*

**Physics**

How does using the concept of resonance determine the speed of sound an in experiment? In other words, I'm wondering how the concept of resonance works
*Wednesday, November 25, 2015 by Emma*

**physics**

A car travelling 110 km/h [S25°W] turns to a heading of [S25°E]. What is the car's change in velocity ?
*Tuesday, November 24, 2015 by George*

**physics**

What force is required to slide a 200 kg box up a 25 degree incline if the coefficient of friction is 0.60?
*Tuesday, November 24, 2015 by Peter*

**Physics**

A small sphere has a hole drilled in it and it is placed onto a wire. The wire is bent into a circle of radius 15 centimeters. The sphere can slide freely without friction around the circular wire. The circular wire is held vertically. (a) If the circular loop of wire is spun ...
*Tuesday, November 24, 2015 by Kyle*

**Circular Motion Physics**

A coin with mass 3.1 grams is at rest atop a wooden block of mass 20 grams. The block is on a spinning platform with a 12 centimeter radius. The coefficients of friction between the platform and the wooden block are μs = 0.75 and μk = 0.64 The coefficient of friction...
*Tuesday, November 24, 2015 by Emily*

**Physics**

A rope which is 7 meters long is laid out on a horizontal table. (a) Assuming that the coefficient of static friction between the rope and the top of the table is 0.5, show that the rope will begin to slide if at least 3 meters of it hangs off the edge. (b) Once it starts to ...
*Tuesday, November 24, 2015 by Emily*

**physics**

an arrow shot vertically upwards loses its intial speed by 60% in 3 secs maximum height reched by the arrow is (g=9.8 m/sec^2)
*Tuesday, November 24, 2015 by d.nikhileswar reddy*

**Physics**

A watch battery can supply approximately 15 C of charge before it needs to be replaced. Calculate the number of hours it will last if the current drawn by the watch is 0.50 micro-amps
*Tuesday, November 24, 2015 by Joe*

**physics**

Note: The direction of the acceleration ~a of the system is given in the figure. Three masses (17 kg, 21 kg and 67 kg) are connected by strings. The 67 kg mass slides on a horizontal surface of a table top and the 17 kg and 21 kg masses hang over the edge of the surface. The ...
*Tuesday, November 24, 2015 by I dont like physics*

**physics**

Consider a block on an incline plane. The coefficients of static and kinetic friction between the block and the incline are µs = 0.353 and µk = 0.31. Calculate the critical angle θc, where the block just begins to slide. Answer in units of ◦. The block ...
*Tuesday, November 24, 2015 by I dont like physics*

**English 1**

Can someone please check these. I answered what I thought was right; therefore, I did not know three of them which are 16, 17, and 19. 6. Compare and contrast the poem “Mexicans Begin Jogging” and the story “Delfino II: Diez in the Desert.” a. Both are ...
*Tuesday, November 24, 2015 by Blair*

**Physics**

An electrical motor has a power rating of 500 W when it is lifting a mass of 80 kg through a height of 6 m in a time of 15 s. Calculate the efficiency of the motor?
*Tuesday, November 24, 2015 by Joe*

**MacArthur physics **

. A person kicks a rock off a cliff horizontally with a speed of 20 m/s. It takes 7.0 seconds to hit the ground, find: a) height of the cliff b) final vertical velocity c) range
*Tuesday, November 24, 2015 by Anonymous *

**Physics**

A baseball player hits a pop fly that goes directly up in the air with an initial velocity of 45 m/s. What is the maximum height the base ball reaches? Work: initial velocity = 45 m/s, gravity= -9.8 m/s, final velocity = 0 m/s
*Tuesday, November 24, 2015 by Natascha *

**physics **

Two blocks of masses m1=5 and m2=6 kg are on either side of the wedge shown below. Assume the surface and the pulley are frictionless. Find A)the direction this system will accelerate B) the acceleration of m1 and m2 C) the tension in the rope did I do this right? how do I ...
*Tuesday, November 24, 2015 by Spice*

**physics **

Two blocks of masses m1=5 and m2=6 kg are on either side of the wedge shown below. Assume the surface and the pulley are frictionless. Find A)the direction this system will accelerate B) the acceleration of m1 and m2 C) the tension in the rope did I do this right? how do I ...
*Tuesday, November 24, 2015 by Spice*

**physics **

a child sits on the edge of a spinning merry-go-round 3.2 m from its center. The coefficient of static friction between the child's bottom and the surface of the merry-go-round is .8. Find the maximum rate in revolutions per seconds, that the merry-go-round can be spun ...
*Tuesday, November 24, 2015 by Spice*

**Physics**

A car, moving along a straight stretch of high- way, begins to accelerate at 0.0377 m/s2. It takes the car 34.3 s to cover 1 km. How fast was the car going when it first began to accelerate? Answer in units of m/s.
*Monday, November 23, 2015 by kate*

**physics**

Your car is stuck in a mud hole. You are alone but you have a long strong rope. having studied physics you tie the rope tautly to a telephone pole and pull on it sideways at the midpoint as shown. Find the force exerted by the rope on the car when the anle is 3.2 and you are ...
*Monday, November 23, 2015 by zach*

**physics**

The distance between two telephone poles is 31 m. When a 1.54kg bird lands on the telephone wire midway between the poles, the wire sags 0.165 m. The acceleration of gravity is 9.8 m/s^2. How much tension in the wire does the bird produce? Ignore the weight of the wire.
*Monday, November 23, 2015 by zach*

**Physics**

The truck of a passenger car applies brakes at a velocity of 30 m/s and comes to rest 5 seconds later. What is the deceleration?
*Monday, November 23, 2015 by Prince *

**Physics**

how long does it take a car to change its velocity from 15m/s to 25m/s if it accelerates uniformly at 5m/s2.
*Monday, November 23, 2015 by Prince *

**Physics**

In a machine a cylinder with a mass of 80.0 g is pushed down into a hole with a spring at the bottom as shown in Figure 1. When the spring is uncompressed the cylinder rests on top of it with its end just at the entrance to the hole. The cylinder is pushed by a rod which is ...
*Monday, November 23, 2015 by Anonymous*

**Physics**

A very large roller coaster has an initial hill that has an 85 m drop. Note that a roller coaster has no engine. After being pulled up the first hill by a chain the train moves along the track with only gravity, normal forces due to the track, friction and air drag acting on ...
*Monday, November 23, 2015 by Anonymous*

**Physics**

For each of the following situations identify what energy transformation is taking place. (a) A child jumps out of a tree and lands on a trampoline. Consider “initial” to be the moment when they have left the tree and “final” to be the moment when they are...
*Monday, November 23, 2015 by Anonymous*

**Physics**

This assignment is about energy. But one of the new things we’ve just learned about is spring forces, so there should be a question about them. So the first parts of this question are not about energy. One end of a spring is attached to the ceiling. The unstretched length...
*Monday, November 23, 2015 by Anonymous*

**Physics**

A low friction cart (similar to what you use in the lab) collides with a second low friction cart. Cart A has a mass of 0.500 kg and cart B has a mass of 0.750 kg. Glider A was moving at 40.0 cm/s before the collision. Glider B was at rest. (a) The carts have velcro on them so...
*Monday, November 23, 2015 by Anonymous*

**Physics**

two air carts of mass m1=0.87kg and m2=0.48kg are placed on a frictionless track.cart 1 is at rest initally, and a spring bumper with a force constant of 690N/m. cart 2 has a flat metal surface for a bumper, and move toward the bumper of the stationary cart with an intial ...
*Monday, November 23, 2015 by Has*

**physics**

Two satellite are monitored as they orbite the earth,satellites Y is foure times as far from the earth's centere as is satellite X. if the period of revolution of satellite X is T. What is the period of revolution of Y?
*Monday, November 23, 2015 by debiru*

**Physics**

A 70.0 kg boy compresses a spring by 0.500 m and slides down a frictionless slide. The slide leads into a 30° ramp that has a coefficient of kinetic friction of 0.110 with the boy. If the spring constant in the spring is 52000 N/m and the slide has a height of 41.0 m, what...
*Monday, November 23, 2015 by Anonymous*

**physics**

5kg particle is atteched at a rim of arotating wheel of radius 2m. the wheel completes each revolution in 3 seconds. The total moment of inertia of the system(I partics+I wheel) is 2kg.m^2 A.determine the rotational kinetic energy of the system? B.the work needed to stop the ...
*Monday, November 23, 2015 by degefech*

**physics **

the cofficient of friction b/n the tyre of the car rotating around horizontal circuar road way is 0.5; what would the minimum radius at which acar turn ahorizontal road when its speed is 15m/s?g=10m/s
*Monday, November 23, 2015 by bediru*

**physics**

The coefficient of friction b/n the Tyre of the car rotating around horizontal circulary road and the road way is 0.5; what would the minimum radius at which a car turn ahorizontal road when its speed is 15m/s? g=10m/s
*Monday, November 23, 2015 by bediru *

**physics **

A uniform solid cylinder of mass 1kg roll with out slipping on aflat surface at aspeed of 4m/s. What is the total kinetic energy of the cylinder?
*Monday, November 23, 2015 by ali*

**Physics**

A 79.5 kg snowboarder heads down a 28.0° hill that has a height of 62.8 m. If the hill is assumed to be frictionless and there is horizontal wind with a force of 98 N acting against the snowboarder, find the speed of the snowboarder as they reach the bottom of the hill ...
*Monday, November 23, 2015 by Anonymous*

**physics**

a small mass of 2kg tide the string of length 3cm complete 4revolutions in one second in horizontal circle. What is the tangential displacement of the body in 5seconds?
*Monday, November 23, 2015 by abidi*

**physics**

what minimum initial velocity must aprojectile have to reach atarget at a distance of 25m away? (g: 10m/s)
*Monday, November 23, 2015 by jemal*

**physics **

A uniform chain 10m long and weighing 6 kg permetre hangs vertically.calculate the work required to wind it up.. Plzz solve it
*Monday, November 23, 2015 by arya*

**Physics**

A gram of living plant material with Carbon-14 , decays at a rate of about 16 disintegrations per minute. When the plant dies, the Carbon-14 decays, with a half-life of 5600 years. A gram of the dead plant is found to decay at about 1 disintegration per minute. Calculate the ...
*Monday, November 23, 2015 by Deidre*

**physics**

Calculate the Specific Gravity of an object that sinks in water if m = 21.97 g and mA = 17.40 g.
*Monday, November 23, 2015 by Kim*

**Physics**

In a machine a cylinder with a mass of 80.0 g is pushed down into a hole with a spring at the bottom as shown in Figure 1. When the spring is uncompressed the cylinder rests on top of it with its end just at the entrance to the hole. The cylinder is pushed by a rod which is ...
*Monday, November 23, 2015 by Hermans*

**Physics**

A very large roller coaster has an initial hill that has an 85 m drop. Note that a roller coaster has no engine. After being pulled up the first hill by a chain the train moves along the track with only gravity, normal forces due to the track, friction and air drag acting on ...
*Monday, November 23, 2015 by Hermans*

**Physics**

3. A low friction cart (similar to what you use in the lab) collides with a second low friction cart. Cart A has a mass of 0.500 kg and cart B has a mass of 0.750 kg. Glider A was moving at 40.0 cm/s before the collision. Glider B was at rest. (a) The carts have velcro on them...
*Monday, November 23, 2015 by Daniel*

**Physics**

One end of a spring is attached to the ceiling. The unstretched length of the spring is 10.0 cm. A 2.0 kg mass is hung from the other end of the spring. It is slowly lowered until it comes to rest. At this point the spring is 15 cm long. (a) What is the stiffness (spring ...
*Monday, November 23, 2015 by Daniel*

**Physics**

A small rock with mass m moves at velocity v0 and hits a rod of mass M as shown. The rod is initially at rest. The collision is completely inelastic. a) What is the angular velocity of the rod after the collision? b) What is the maximum angle the rod makes with the vertical?
*Monday, November 23, 2015 by Jack*

**Physics**

The typical lifetime of a star like our Sun is 10 billion years. While a star like our Sun is able to generate energy in its core (through fusion) the thermal pressure balances the gravitational pressure from the Sun’s mass. However, once the star rules our of hydrogen, ...
*Monday, November 23, 2015 by Vivek*

**Physics**

A round object with mass m and radius R rolls down a ramp that makes an angle θ with respect to the horizontal. You can assume there is static friction so that the object rolls without slipping. a) For now, take the moment of inertia of the object to be I (you do not know...
*Monday, November 23, 2015 by Vivek*

**PHYSICS**

Two forces, one four times as large as the other pull in the same direction a 10kg mass and impart to it an acceleration of 2.5 m/s^2. if the smaller force is removed. what is the acceleration of the mass?
*Monday, November 23, 2015 by Camz*

**PHYSICS**

Two forces of magnitude 6N and 4N act on a body. what is the ratio of the acceleration produce when these forces are acting in the same direction to the acceleration when oppositely directed ?
*Monday, November 23, 2015 by Camz*

**Physics**

A car travels at 80 km/h on a level road in the positive direction of an x axis. Each tire has a diameter of 66 cm. Relative to a woman riding in the car and in unit-vector notation, what are the velocity at the (a) center, (b) top, and (c) bottom of the tire and the magnitude...
*Monday, November 23, 2015 by Abdullah*

**Physics**

A marble is thrown horizontally with a speed of 13.9 m/s from the top of a building. When it strikes the ground, the marble has a velocity that makes an angle of 40 ° with the horizontal. From what height above the ground was the marble thrown?
*Monday, November 23, 2015 by Stark*