Friday

October 9, 2015
**Physics help!!**

A plane is flying horizontally at constant speed, vo. when it releases a package. The package lands on the ground at t seconds later. Just before the package lands... a. What is its horizontal component of velocity? Leave in terms of vo and t. b. What is its vertical component...
*Friday, September 25, 2015 by jeff*

**physics**

Consider a carwith front cross-sectional area of A=(1.77 ± 0.02)m^2 and a drag coefficient of C=(0.38±-0.02) moving with a speed of v=(10.0±0.5)m/s. Suppose that the density of air is p=1.20 kg/m^3 at the sea level. calculate the force F=(1/2)CApv^2 on the...
*Friday, September 25, 2015 by megameno*

**Physics**

A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 23.0° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 55.3 kg, and the coefficient of kinetic ...
*Friday, September 25, 2015 by Tia*

**physics**

How much time does a passerby on the sidewalk below have to move out of the way before the flowerpot hits the ground? Answer in units of s.
*Friday, September 25, 2015 by Anonymous*

**physics**

A flowerpot falls from a window sill 38.5 m above the sidewalk. What is the velocity of the flowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s.
*Friday, September 25, 2015 by Anonymous*

**Physics**

Projectile motion problem where a projectile is launched from level ground and lands on level ground. I have to use the kinematic equations to show that the time it takes for the projectile to reach its maximum height is equal to one half of the the total flight time.
*Friday, September 25, 2015 by Anon2013*

**physics**

A tennis ball is thrown vertically upward with an initial velocity of +7.5 m/s. What will the ball’s velocity be when it returns to its starting point? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s.
*Friday, September 25, 2015 by Anonymous*

**physics**

A robot probe drops a camera off the rim of a 323 m high cliff on Mars, where the free-fall acceleration is 3.7 m/s2 . Find the velocity with which it hits the ground. Answer in units of m/s.
*Friday, September 25, 2015 by Anonymous*

**Physics**

Two point charges are on the y-axis, one of magnitude 3.0 * 10^-9 C at y= 10cm and a second of magnitude 6.0 * 10^-9 at the point y=30cm. Calculate the potential at y= 60cm.
*Friday, September 25, 2015 by Casanova*

**physics**

A certain car is capable of accelerating at a uniform rate of 0.83 m/s2 . What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 80 km/h to one of 92 km/h?
*Friday, September 25, 2015 by Anonymous*

**physics**

a bullet is fired vertically upward from a gun at a velocity of 150m/s.taking g to be 10m/s calculate the gretest heigt reached and at what time and the time the bullet will enter the gun and at what velocity
*Friday, September 25, 2015 by cecil*

**physics**

A certain car is capable of accelerating at a uniform rate of 0.83 m/s2 . What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 80 km/h to one of 92 km/h?
*Friday, September 25, 2015 by Anonymous*

**Physics **

A 130-m-wide river flows due east at a uniform speed of 4.1m/s. A boat with a speed of 6.6m/s relative to the water leaves the south bank pointed in a direction 29o west of north. What is the (a) magnitude and (b) direction of the boat's velocity relative to the ground? ...
*Friday, September 25, 2015 by barich*

**Physics **

A boat is traveling upstream at 13 km/h with respect to the water of a river. The water is flowing at 9.0 km/h with respect to the ground. What are the (a) magnitude and (b) direction of the boat’s velocity with respect to the ground? A child on the boat walks from front ...
*Friday, September 25, 2015 by barich*

**Physics **

A boy whirls a stone in a horizontal circle of radius 2.0 m and at height 2.2 m above level ground. The string breaks, and the stone flies off horizontally and strikes the ground after traveling a horizontal distance of 9.7 m. What is the magnitude of the centripetal ...
*Friday, September 25, 2015 by barich*

**Physics **

A woman rides a carnival Ferris wheel at radius 20 m, completing 4.8 turns about its horizontal axis every minute. What are (a) the period of the motion, and the magnitude of her centripetal acceleration at (b) the highest point and (c) the lowest point?
*Friday, September 25, 2015 by barich*

**Physics **

In 1939 or 1940, Emanuel Zacchini took his human-cannonball act to an extreme: After being shot from a cannon, he soared over three Ferris wheels and into a net (see the figure). Assume that he is launched with a speed of 29 m/s and at an angle of 59°. (a) Treating him as ...
*Friday, September 25, 2015 by barich*

**Physics **

A rifle that shoots bullets at 447 m/s is to be aimed at a target 40.7 m away. If the center of the target is level with the rifle, how high above the target must the rifle barrel be pointed so that the bullet hits dead center?
*Friday, September 25, 2015 by barich*

**Physics **

A trebuchet was a hurling machine built to attack the walls of a castle under siege. A large stone could be hurled against a wall to break apart the wall. The machine was not placed near the wall because then arrows could reach it from the castle wall. Instead, it was ...
*Friday, September 25, 2015 by barich*

**Physics **

A certain airplane has a speed of 336.8 km/h and is diving at an angle of θ = 32.0° below the horizontal when the pilot releases a radar decoy (see the figure). The horizontal distance between the release point and the point where the decoy strikes the ground is d = ...
*Friday, September 25, 2015 by barich*

**Physics **

A particle leaves the origin with an initial velocity v Overscript right-arrow EndScripts equals left-parenthesis 7.34 i Overscript ̂ EndScripts right-parenthesis m divided by s and a constant acceleration a Overscript right-arrow EndScripts equals left-parenthesis ...
*Friday, September 25, 2015 by barich*

**Physics **

The position ModifyingAbove r With right-arrow of a particle moving in an xy plane is given by ModifyingAbove r With right-arrow equals left-parenthesis 3 t cubed minus 2 t right-parenthesis ModifyingAbove i With caret plus left-parenthesis 5 minus 2 t Superscript 4 Baseline ...
*Friday, September 25, 2015 by barich*

**Physics - URGENT**

Four forces are acting on an object in static equilibrium: Force 1 has a magnitude of 46.0 N and is acting at an angle of 52 degrees above the positive x-axis. Force 2 has a magnitude of 29 N and is acting along the positive x-axis. Force 3 has a magnitude of 34.5 N and is ...
*Friday, September 25, 2015 by Anonymous*

**Physics**

The substation bus bar is made up of 2-iches round copper bars 20 ft. long. What is the resistance of each bar if resistivity is 1.724 x 10-6 ohm-cm.
*Friday, September 25, 2015 by Jhun*

**Physics**

An incline is divided into 6 equal lengths. Starting from rest a ball accelerates down the incline. It takes 0.21 seconds to reach the first tape marker, a distance of 0.15 meter.
*Friday, September 25, 2015 by Sarah*

**Physics**

A car is braked so that it slows down with uniform retardation from 15 m/s to 7 m/s while it travels a distance of 88 m. If the car continues to slow down at the same rate, after what further distance will it be brought to rest?
*Friday, September 25, 2015 by Manish*

**physics**

realation between earth gravity and moon gravity
*Thursday, September 24, 2015 by kv*

**Physics**

A 75 kg rock climber is attached to a rope that is allowing her to hang horizontally with her feet against the wall. The tension in the rope is 825 N and the rope makes a 35 degree angle with the vertical. Determine the force exerted by the wall on the climbers feet.
*Thursday, September 24, 2015 by Dawson*

**Physics**

Three boxes A, B, and C are placed on a frictionless surface as shown in the diagram below. If you push on box A with a force of 8.25 N, find the magnitude of the contact force between each pair of boxes. Here mA = 6.90 kg, mB = 3.80 kg, and mC = 1.50 kg. contact force between...
*Thursday, September 24, 2015 by Anonymous*

**Physics**

A mover has to move a heavy sofa of mass 49.0 kg to the second floor of the house. As he pulls on the rope tied to the sofa, he makes sure that the rope is parallel to the surface of the ramp, which is at 30.0° to the horizontal. If the coefficient of kinetic friction ...
*Thursday, September 24, 2015 by Anonymous*

**Physics**

ou are helping your friend move a new refrigerator into his kitchen. You apply a horizontal force of F = +214i − 171k N to try and move the 64.0-kg refrigerator. The coefficient of static friction is 0.660. (a) How much static frictional force does the floor exert on the...
*Thursday, September 24, 2015 by Anonymous*

**Physics**

Three boxes A, B, and C are placed on a frictionless surface as shown in the diagram below. If you push on box A with a force of 8.25 N, find the magnitude of the contact force between each pair of boxes. Here mA = 6.90 kg, mB = 3.80 kg, and mC = 1.50 kg.
*Thursday, September 24, 2015 by Anonymous*

**Physics**

A two-slit pattern is viewed on a screen 1.08 m from the slits. If the two fourth-order maxima are 52.8 cm apart, what is the total width of the central bright fringe?
*Thursday, September 24, 2015 by Rachel*

**physics**

the gravitational force on an object on the surface of the earth is F , what's the gravitational force on the satelite when at height R/20, where R is the radius of the Earth ?
*Thursday, September 24, 2015 by edward*

**physics**

My answer doesn't make sense. I will show question then my work: A city holding tank for water sits 20 m above the city. If a house was on fire 15 m away from the base of the holding tank, and the tank was originally filled to a depth of 15 m, to what depth would ...
*Thursday, September 24, 2015 by Jackie*

**Physics**

A mover has to move a heavy sofa of mass 49.0 kg to the second floor of the house. As he pulls on the rope tied to the sofa, he makes sure that the rope is parallel to the surface of the ramp, which is at 30.0° to the horizontal. If the coefficient of kinetic friction ...
*Thursday, September 24, 2015 by Madison*

**physics**

My answer doesn't make sense. I will show question then my work: A city holding tank for water sits 20 m above the city. If a house was on fire 15 m away from the base of the holding tank, and the tank was originally filled to a depth of 15 m, to what depth would ...
*Thursday, September 24, 2015 by Jackie*

**physics**

A shuffleboard disk is accelerated at a constant rate from rest to a speed of 4.6 m/s over a 1.4 m distance by a player using a cue. At this point the disk loses contact with the cue and slows at a constant rate of 2.6 m/s2 until it stops. (a) How much time elapses from when ...
*Thursday, September 24, 2015 by Hirak*

**Physics**

What weight could be supported by a rotating object if it had a mass of 98 grams and if it were revolving in a horizontal circle, 50 cm diameter, and making 240 rev/min?
*Thursday, September 24, 2015 by Talmadge*

**physics**

Copy of Vector A has a magnitude of 5 and is at an angle of 29.7 degrees measured counter-clockwise from the x axis. Vector B has a magnitude of 12 and is at an angle of 115.4 degrees measured counter-clockwise from the x axis. Vector C has a magnitude of 18 and is at an angle...
*Thursday, September 24, 2015 by sally*

**physics**

While curling, you push a rock for 1.70 m and release it when it has a speed of 2.40 m/s. It continues to slide at constant speed for 1.40 s and then hits a rough patch of ice. It finally comes to rest 7.20 m from where it was released. What was the curling rock's ...
*Thursday, September 24, 2015 by niro*

**Physics?**

consider two solid cones made from a uniform material. The smaller cone is a ½ scale model of the bigger one. They are released from equal height, quickly reach their terminal velocities and fall in air until they hit the ground. Use scaling reasoning to predict which ...
*Thursday, September 24, 2015 by Jay*

**PHYSICS**

an electron is moving at 2x10^5 m/s through a uniform magnetic field of 1.4x10^-3 T.what is the magnitude of magnetic force if the velocity of the electron and the field make an angle of 45 degree.
*Thursday, September 24, 2015 by please help w/ complete sol'n.*

**physics**

While standing on top of a 323 m tall building, you see Iron Man flying straight down toward the ground at a speed of 35.0 m/s. Just as he passes you, you drop a can of Dr Pepper off the roof. How fast is the can going when it passes Iron Man?
*Thursday, September 24, 2015 by niro*

**Physics **

A car, moving along a straight stretch of high- way, begins to accelerate at 0.014 m/s2. It takes the car 23.2 s to cover 1 km. How fast was the car going when it first began to accelerate? Answer in units of m/s.
*Thursday, September 24, 2015 by Bob*

**physics **

During an Apollo lunar landing mission, the command module continued to orbit the Moon at an altitude of about 113 km. How long did it take to go around the Moon once?
*Thursday, September 24, 2015 by kirsten*

**Physics **

2) Which of the following quantities has the same dimensions as a distance? a. vt b. 1/2 at^2 c. 2at d. v^2/a v=speed, t=time a=acceleration. 3) which of the following quantities has the same dimensions as speed a. 1/2 at^2 b. at c.(2x/a)^1/2 d. (2ax)^1/2 v=speed, t=time a=...
*Thursday, September 24, 2015 by anonymous *

**Physics **

1) use dimensional analysis to determine which of the following expressions gives the area of a circle: is it pie r ^2, or 2 pie r? explain - pie r^2 right?? because its what they normally use to find area of a circle 2) If a distance d has units of meters and a time T has ...
*Thursday, September 24, 2015 by anonymous *

**Physics**

A sound wave with a frequency of 260 Hz moves with a velocity of 343 m/s through air. What is the distance from one condensation region (area of maximum pressure) to the next?
*Thursday, September 24, 2015 by Tori*

**Physics**

A student drops a rock from a bridge to the water 12.0 meters below. With what speed does the rock hit the water?
*Thursday, September 24, 2015 by Sarah*

**Physics. **

How do I find how long it takes to drain one half of the initial volume of the conical tank . and what fraction of the full drain time is it?
*Thursday, September 24, 2015 by Jay*

**Noun**

physics: pls!!!!! i need ur help. in an experiment to verify Newton's law of cooling, the temperature of hot water in a calorimeter $T/^{o}C$ is plotted against time t/min. Which of the following is true about the graph? (a) The graph is linear and parallel to the T-axis...
*Thursday, September 24, 2015 by basil*

**physics**

A baseball player standing on the ground throws a ball straight up. The ball leaves the player's hand with a speed of 15.5 m/s and is in the air for 3.30 s before hitting the ground. How high above the ground was the baseball player's hand when he released the ball?
*Thursday, September 24, 2015 by niro*

**Physics**

A certain car is capable of accelerating at a uniform rate of 0.83 m/s2 . What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 80 km/h to one of 92 km/h? Answer in units of m.
*Thursday, September 24, 2015 by jon*

**Physics**

An 8 kg mass is supported by an aluminum wire of length 80 cm abd diameter 2.0mm. How much will the wire stretch?
*Thursday, September 24, 2015 by Grace*

**physics **

A train at a constant 43.0 km/h moves east for 20.0 min, then in a direction 54.0° east of due north for 25.0 min, and then west for 30.0 min. What are the (a) magnitude and (b) angle (relative to east) of its average velocity during this trip?
*Thursday, September 24, 2015 by barich*

**physics**

an object falls directly from a plane flying horizontally at an altitude of 10000ft at 50mi/h. how long will it take to hit the ground?
*Thursday, September 24, 2015 by ayon*

**physics**

Henry hits a hockey puck in the positive x-direction at time, t ≈ t0. The puck is then stopped by a net starting at time, t ≈ t1. Which of the following curves could describe the acceleration of the hockey puck if we ignore any effects of friction? 1. a t0 t t
*Wednesday, September 23, 2015 by confused*

**Physics**

consider two solid cones made from a uniform material. The smaller cone is a ½ scale model of the bigger one. They are released from equal height, quickly reach their terminal velocities and fall in air until they hit the ground. Use scaling reasoning to predict which ...
*Wednesday, September 23, 2015 by Jason*

**Physics(which cone will land first)**

consider two solid cones made from a uniform material. The smaller cone is a ½ scale model of the bigger one. They are released from equal height, quickly reach their terminal velocities and fall in air until they hit the ground. Use scaling reasoning to predict which ...
*Wednesday, September 23, 2015 by Jason*

**Physics**

how much heat is needed to vaporize a 400.0 g of liquid water at 310.0 K?
*Wednesday, September 23, 2015 by Felix*

**physics **

A car is traveling at a constant velocity of 21 m/s (about 45 mph). The driver sees a fallen tree lying across the road and hits the brakes after a delay (reaction time) of 245 ms. (1 ms = 10-3 s.) Calculate the distance the car travels during this 245 ms reaction time period...
*Wednesday, September 23, 2015 by rosy*

**Physics**

A rocket engine can accelerate a rocket launched from rest vertically up with an acceleration of 18.4 m/s2. However, after 49.6 seconds of flight the engine fails. Neglect air resistance and assume g = 9.80 m/s2 throughout the flight.
*Wednesday, September 23, 2015 by Melissa*

**Physics**

A small container of water is placed on a carousel inside a microwave oven, at a radius of 13.5 cm from the center. The turntable rotates steadily, turning through one revolution each 6.90 s. What angle does the water surface make with the horizontal? Im lost on how to do this...
*Wednesday, September 23, 2015 by Michael*

**Physics **

1) use dimensional analysis to determine which of the following expressions gives the area of a circle: is it pie r ^2, or 2 pie r? explain - pie r^2 right?? because its what they normally use to find area of a circle 2) If a distance d has units of meters and a time T has ...
*Wednesday, September 23, 2015 by anonymous *

**Physics**

A skier takes off a ski jump, with a velocity of 25m/s at an angle of 30 degrees above the horizontal/ the take off point is 2 m above the slope, which falls away in front of her 15 degrees below the horizontal. Treating the skier as a point particle and ignoring air ...
*Wednesday, September 23, 2015 by Nicholle*

**physics**

Two racing boats set out from the same dock and speed away at the same constant speed of 120 km/h for half an hour (0.500 h), the blue boat headed 23.7° south of west, and the green boat headed 34.4° south of west. During this half-hour (a) how much farther west does ...
*Wednesday, September 23, 2015 by sophia*

**physics**

An object is dropped from rest at a height of 112 m. Find the distance it falls during its final second in the air. m
*Wednesday, September 23, 2015 by Anonymous*

**Physics**

Two forces whose resultants is 100N are perpendicular to each other. If one of them makes an angle of 60 degree with the horinzontal. Calculate its magnitude
*Wednesday, September 23, 2015 by Maria-Gorretti*

**Physics**

A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 34.1 m/s. At the same time, it has a horizontal velocity of 51.1 m/s. At what speed does the vehicle move along its descent path? 1.Answer in units of m/s. 2.At what angle with the ...
*Wednesday, September 23, 2015 by Brandon*

**math**

in an examination, 31 candidate passed chemistry, 29 passed physics and 3 failed both subject. if 50 candidate sat for the examination, how many of them passed chemistry only?
*Wednesday, September 23, 2015 by Anonymous*

**physics**

a bock with mass 60kg sits on a surface with static friction Us = 0.51. a spring (k = 69N) is stretched horizontally by 11cm but the block is still stationary. What is the friction force felt by the block when stretched 11cm?
*Wednesday, September 23, 2015 by anne*

**Physics **

an airplane flies sue west at 185 km/h with respect to the air. there is a wind blowing at 85 km/h to the northeast relative to the ground. what is the planes speed and direction with respect to the ground answers. // our class is literally stuck in this and our teacher isn&#...
*Wednesday, September 23, 2015 by Katelyn*

**Physics**

If you throw a ball straight up at 10 m/s and release it 2m above the ground: a) What height will the ball reach V^2=u^2+2as 0=100+19.6s s=5.1+2 s=7.1m b)How long after you release the ball will it hit the ground? (Answer should be 2.22s but need help getting there)
*Wednesday, September 23, 2015 by Lisa*

**physics **

A lizard accelerates from 2m/s to 10m/s in 4 seconds. What is the lizards average acceleration?
*Wednesday, September 23, 2015 by eve*

**physics **

A child rides a ferrisvwheel for 3.5 minutes. If a rotation covers 986 feet and it rotates 1.5 times per minute, what is the velocity of the ride? Whats the mistake?
*Wednesday, September 23, 2015 by eve*

**Physics**

The velocities of sound in media P and Q are 300 meters/second and 350 meters/second respectively. If the difference in wavelength of the two waves in those media is 0.5 meters, what distance will the sound travel in 50 vibrations in the medium Q? The first answer I got was ...
*Wednesday, September 23, 2015 by Anon*

**Physics**

A sound wave travels a distance 1020 m in 5 minutes. If the length of the three successive crests is 15 m, then calculate the wave speed. "Length of three crests"? I'm not sure about that.
*Wednesday, September 23, 2015 by Kip*

**Physics**

You are driving off of a horizontal cliff, again!!! The cliff is measured to be 35.56 m above a rocky ravine floor, but you land 10.36 m away from the sheer cliff face. How fast were you going when you drove off of the cliff?
*Wednesday, September 23, 2015 by Ashley*

**Physics**

You are driving off of a horizontal cliff, and your car has a horizontal velocity of 29.33 m/s at the instant you leave the cliff. The cliff is an unknown height above a rocky ravine, but you land 146.8 m away from the sheer cliff face. How tall is the cliff?
*Wednesday, September 23, 2015 by Ashley*

**Physics**

An 8 kg mass is supported by an aluminum wire of length 80 cm abd diameter 2.0mm. How much will the wire stretch?
*Wednesday, September 23, 2015 by Grace*

**physics**

A cannonball is fired with an angle of 40 degree above the horizontal.If the velocity when it hits the ground is 80 m/s FIND a.Viy b.time of travel c.max height d.range
*Wednesday, September 23, 2015 by gimel*

**physics**

a cart if weight 25 N is released at the top of an inclined plane of length 1m, which makes an angle of 30 degree with the ground. It rolls down the plane and hits another cart of weight 40 N at the bottom of the incline. Calculate the speed of the first cart at the bottom of ...
*Wednesday, September 23, 2015 by ancy*

**Physics**

A fast, measured pitched baseball left the pitcher's hand at a speed of 48.6 m/s. The pitcher was in contact with the ball over a distance of 1.44 m and produced constant acceleration. I know that t=(Vf-Vi)/a based on a kinematic equation. Also, I setup: 1.44=Vi(t) + 0.5at...
*Wednesday, September 23, 2015 by Skylar*

**AP Physics **

A baseball player throwing the ball from the outfield usually allows it to take one bounce on the theory that the ball arrives sooner this way. Suppose that ball hits the ground at an angle θ and then bonuses but loses half of its speed. A. Assuming that the ball is ...
*Tuesday, September 22, 2015 by Rachel *

**Physics**

A boy sledding down a hill accelerates at 2.33 m/s2 . If he started from rest, in what distance would he reach a speed of 8.70 m/s? Answer in units of m
*Tuesday, September 22, 2015 by Nadeen*

**physics**

A bullet is fired straight up from a gun with a muzzle velocity of 217 m/s. Neglecting air resistance, what will be its displacement after 9 s? The acceleration of gravity is 9.8 m/s2 .
*Tuesday, September 22, 2015 by pedro*

**Physics(volume flow rate)**

Imagine a house with two bathrooms/showers: one downstairs, the other upstairs. The volume flow rate of the shower head downstairs (2 meters above the ground level) is 4*10-4 m3/s. The cross sectional area of the shower head is 30 mm2. What is the volume flow rate of an ...
*Tuesday, September 22, 2015 by Jason*

**Physics (density)**

A steel drum (barrel) has a volume of 200 Liters and a mass of 16 kg. It is filled to the top with an unknown liquid, sealed and thrown into water. It is floating with 50% of its volume underwater. What is the density of the liquid inside the drum? Assume the walls of the drum...
*Tuesday, September 22, 2015 by Jason*

**Physics**

Basically... distance is 4 km Takes 4 min to go down river Takes 6 min to come up How fast is the river?
*Tuesday, September 22, 2015 by Eric *

**Physics**

A 6.08 kg box sits on a ramp that is inclined at 37.4 ∘ above the horizontal. The coefficient of kinetic friction between the box and the ramp is 0.30. What horizontal force is required to move the box up the incline with a constant acceleration of 4.30 m/s2 ?
*Tuesday, September 22, 2015 by Nicholas*

**physics**

A speeder driving down the road at a constant 20m/s passes a patrolman parked on the roadside. The patrolman waits 3 seconds then pursue the speeder accelerating at a constant 4m/s2. When does the patrolman catch the speeder
*Tuesday, September 22, 2015 by chelsea*

**Physics **

The tortoise and the hare are in a race of 1000m distance. The tortoise travels the entire race at a speed of 2.0 m/s while the rabbit runs the first 200 m @ 2.0 m/s. Then he stops to take nap for 1.3 hrs and awakens to finish the last 800m with an average speed of 3.0 m/s. ...
*Tuesday, September 22, 2015 by Karen*

**physics**

A block is at rest on the incline shown in the figure. The coefficients of static and kinetic friction are µs = 0.4 and µk = 0.34, respectively. The acceleration of gravity is 9.8 m/s. What is the largest angle which the incline can have so that the mass does not ...
*Tuesday, September 22, 2015 by king*

**Physics**

Suppose a rocket ship in deep space moves with constant acceleration equal to 9.80 m/s2, which gives the illusion of normal gravity during the flight. (a) If it starts from rest, how long will it take to acquire a speed 12% that of light, which travels at 3.0 × 108 m/s...
*Tuesday, September 22, 2015 by Jessica*

**PHYSICS**

1.)what is the magnitude of the force experienced by a proton moving at 3 km/s inside magnetic field of strength 0.05T 2.)an electron is moving at 2x10^5 m/s through a uniform magnetic field of 1.4x10^-3 T.what is the magnitude of magnetic force if the velocity of the electron...
*Tuesday, September 22, 2015 by Please! Anybody Help me.*

**Physics **

What are three different kinds of automatic switching devices? What are the conditions that cause the on/off action of the switch?
*Tuesday, September 22, 2015 by Grace*

**Physics**

Part A of this question asks for the sum of vector A = 3x+5y and vector B = 1x-3y. I did this and got the vector A + vector B = 4x+2y. Part B then asks what the magnitude and direction of vector A + vector B? The answer in the back of the textbook says that it is 4.5 at a 27 ...
*Tuesday, September 22, 2015 by Kendall*

**physics**

A giant bull running at 15 m/s slows at a rate of 2.4 meters per second per second. How long does it take it to stop?
*Tuesday, September 22, 2015 by ana*

**physics**

A bear spies some honey and takes off from rest, accelerating at a rate of 2.8 m/s^2. If the honey is 20m away, How fast will the bear be going when he gets to the honey?
*Tuesday, September 22, 2015 by ana*