Wednesday

January 18, 2017
**physics **

Add the following vectors: 440 N at 100 degrees 905 N at 160 degrees A.1187.7 N at 128.7 degrees B.1010.4 N at 48.2 degrees C.1345 N at 130 degrees D.1013.5 N at 149 degrees

*Sunday, September 20, 2015 by kat*

**physics **

Convert the resultant vector into its x and y components. 225 N at 12 degrees A.(222.3 N, 37.4 N) B(201.1 N, 10.8 N) C.(45.8 N, 201.1 N) D.(220.1 N, 46.8 N)

*Sunday, September 20, 2015 by john *

**physics**

When a 0.106 kg mass is suspended at rest from a certain spring, the spring stretches 3.50 cm. Find the instantaneous acceleration of the mass when it is raised 5.20 cm, compressing the spring 1.70 cm.

*Sunday, September 20, 2015 by john*

**Physics **

A 17.8 kg block is dragged over a rough, horizontal surface by a constant force of 72.8 newtons acting at an angle of 31.3 degrees above the horizontal. the block is displaced 64.4 m and the coefficient of kinetic friction is 0.239. find the work done by the 72.8 n force. ...

*Sunday, September 20, 2015 by Giana*

**Physics**

A boy weighing 3.9 102 N jumps from a height of 2.15 m to the ground below. Assume that the force of the ground on his feet is constant. a) Compute the force of the ground on his feet if he jumps stiff-legged, the ground compresses 1.80 cm, and the compression of tissue and ...

*Sunday, September 20, 2015 by Stacey*

**Physics-HELP**

An airplane is traveling 775 km/h in a direction 42.5Â° west of north (Figure 3-31). (a) Find the components of the velocity vector in the northerly and westerly directions. northerly km/h westerly km/h (b) How far north and how far west has the plane traveled after ...

*Sunday, September 20, 2015 by Manny*

**Physics**

A sustained force of 44 N moves a model airplane 10 m along its runway to provide the required speed for takeoff. Find the kinetic energy at takeoff.

*Sunday, September 20, 2015 by Genesis*

**Physics**

a box weighing 800n is dragged across a level floor at a constant speed under the influence of a 60n applied force.What is the coefficient of sliding friction between the box and the floor?

*Sunday, September 20, 2015 by Lyd*

**physics**

A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 6.27 m/s. The car is a distance d away. The bear is 32.1 m behind the tourist and running at 9.06 m/s. The tourist reaches the car safely. What is the maximum possible value for d?

*Sunday, September 20, 2015 by Hannah*

**physics**

A fire fighter is trying to shoot water straight to the window located at the second floor of a house 6 m above the ground. The distance between the fire fighter and the house is 8 m and he holds the fire hose 1.8 m above the ground. The water leaves the hose with a constant ...

*Sunday, September 20, 2015 by Phillip*

**Physics**

10. A military jet flies horizontally with a velocity of 450 m/s and 20,000 m above the ground. When the jet is straight above an artillery gun a shell is fired. Assuming the shell hits the jet. a. Calculate the horizontal component of the initial velocity of the shell. b. ...

*Sunday, September 20, 2015 by Zachary Star*

**Physics**

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.34 m. The stones are thrown with the same speed of 9.35 m/s. Find the location (above the base of the ...

*Sunday, September 20, 2015 by Hannah*

**Physics**

a driver of a car traveling at 17.3 m/s applies the brakes causing a uniform deceleration of 2.8m/s^2. How long does it take the car to accelerate to a final speed of 13.5 m/s?

*Sunday, September 20, 2015 by Tytiana*

**AP Physics I**

A placekicker is about to kick a field goal. The ball is 26.6 m from the goal post. The ball is kicked with an initial velocity of 19.0 m/s at an angle θ above the ground. Between what two angles, θ1 and θ2, will the ball clear the 2.8-m-high crossbar? (Hint: ...

*Sunday, September 20, 2015 by Matt*

**Physics-HELP**

An Olympic long jumper is capable of jumping 7.5 m. Assume that his horizontal speed is 8.8 m/s as he leaves the ground. How long is he in the air? How high does he go? Assume that he lands standing upright, that is, the same way he left the ground.

*Sunday, September 20, 2015 by Manny*

**Physics **

A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 56.3 Â° above the horizontal. The rocket is fired toward an 11.0-m high wall, which is located 21.5 m away. The rocket attains its launch speed in a negligibly short period of time, after ...

*Sunday, September 20, 2015 by Physisc Help*

**physics**

what is the pressure on the bottom of an aquarium 0.3 m deep filled with water

*Sunday, September 20, 2015 by cath*

**Physics**

a student sees a ball fall from the third floor of a building and notes that it takes 2.50 s for the ball to fall the last half of the way to the ground. What is the height of the building?

*Sunday, September 20, 2015 by Liselotte*

**physics**

A truck starts from the rest and moves with a accelaration 1.5m/s^2 ,at the same time a car which is 150m behind the truck starts from the rest with an accelaration of 2m/sec^2. Find the time which the car will overtake the truck and the distance travel.

*Sunday, September 20, 2015 by Afreed *

**Physics **

Calculate the height through which a crane can lift a load of 4 ton when it's motor of 4 H.P operates for 10 sec. Acceleration due to gravity is 10 m/s2

*Sunday, September 20, 2015 by Sarthak *

**Physics**

A hammer is thrown horizontally from the flat roof of a tall building at a velocity of 10m/s and hits the ground below after 5 seconds. (a) How high is the roof? (b) How far from the building does it land.

*Sunday, September 20, 2015 by Heinnrick*

**Physics**

A 0.340 kg particle moves in an xy plane according to x(t) = -15.00 + 2.00t - 4.00t3 and yet) = 25.00 + 7.00t - 9.00t2, with x and y in meters and t in seconds. At t = 0.700 s, what are (a) the magnitude and (b) the angle (relative to the positive direction of the x axis) of ...

*Sunday, September 20, 2015 by Haad*

**Physics **

A married couple is driving on a dark road at night at the rate of 98.0 m/s until they see a clown 50m in front of them and slam the brakes to slow the car down to 10.0m/s and still manage to hit the clown. How much time would the clown have had to move before being roadkill? ...

*Sunday, September 20, 2015 by Tiffany *

**physics**

A 15-V battery is hooked up to three resistors in series. The voltage drop across the first resistor is 3V and the voltage drop across the sencond resistor is 10V. What is the voltage drop across the last resistor? I don't understand what equation to do for this problem. ...

*Saturday, September 19, 2015 by Grace *

**physics**

A rocket is fired at an angle from the top of a tower of height h0 = 65.5 m . Because of the design of the engines, its position coordinates are of the form x(t)=A+Bt2 and y(t)=C+Dt3, where A, B, C , and D are constants. Furthermore, the acceleration of the rocket 1.50 s after...

*Saturday, September 19, 2015 by justin*

**Physics**

The mass of a satellite is 2 Kg. Assuming that the mass is evenly distributed throughout the satellite, calculate the moments of inertia about the X, Y and Z axes.

*Saturday, September 19, 2015 by Darrin*

**physics **

Vector A has magnitude 8.0 units at an angle of 60o from the x-axis. Vector B has magnitude 6.0 at an angle of -30o from the x-axis. Find the magnitude and direction of vector C = A + B I tried actually drawing it to see if it would help but it didn't I'm pretty sure ...

*Saturday, September 19, 2015 by JOHN SMITH*

**Physics**

When a 0.111 kg mass is suspended at rest from a certain spring, the spring stretches 3.90 cm. Find the instantaneous acceleration of the mass when it is raised 6.20 cm, compressing the spring 2.30 cm.

*Saturday, September 19, 2015 by Stacey*

**physics**

100 kg car moving at 22 m/s runs into a horizontal spring with spring constant 4200 N/m. How far does the car displace the spring before coming to a stop? Please show your work.

*Saturday, September 19, 2015 by Brandi*

**physics**

A man drops a stone into a water well on his farm. He hears the sound of the splash 3.55 s later. How deep is the well? The acceleration due to gravity is 9.8 m/s 2 and the speed of sound in air is 324 m/s. Answer in units of m Vo= something V= 324 m/s?? a= 9.8 m/s^2 t= 3.55 s...

*Saturday, September 19, 2015 by Anonymous*

**physics**

A 1100 kg car accelerates from rest to 27 m/s in 6.0 seconds. Neglecting friction, hat is the average power consumption in horsepower?

*Saturday, September 19, 2015 by Brandi*

**Physics**

Using GRAPHICAL METHOD, find the vector sum of a force of 20 N directed 60 degrees east of north and a force of 60 N directed west? Please show all steps and equations used.

*Saturday, September 19, 2015 by Alyssa*

**Physics**

Police find skid marks 65.0 m long on a highway showing where the car made an emergency stop. Assuming the acceleration was -10.3 m/s^ ( about the maximum for dry pavement) how fast was the car going?

*Saturday, September 19, 2015 by Tyler*

**Physics**

Maria throws a ball straight up with an initial velocity of 10 m/s. What is its velocity at the highest point? What is its velocity when it returned to the elevation from where it is thrown ? What is its acceleration at the highest point? What is its acceleration just before ...

*Saturday, September 19, 2015 by Joyce*

**Science- Physics**

Two plane mirrors, A and B, are separated by 30.0 cm facing each other. An object is placed 20 cm from mirror A. Locate the first two nearest image formed by each mirror.

*Saturday, September 19, 2015 by trsgts*

**Science- Physics**

A plane mirror is mounted at the back of the truck that is moving at 25 km/h. How fast does the image of a man standing on the road seem to be moving away from him?

*Saturday, September 19, 2015 by trsgts*

**PHYSICS**

3 PARTICLES OF MASS 1KG,2KG,3KG PLACED AT CORNER A,B,C OF AN EQUILARERA TRIANGLE A,B AND C.LOCATE THE POSITION OF PARTICLE/FIND COORDINATES

*Saturday, September 19, 2015 by ARYAN *

**Physics**

If the electric field inside a capacitor exceeds the dielectric strength of the dielectric between its plates, the dielectric will break down, discharging and ruining the capacitor. Thus, the dielectric strength is the maximum magnitude that the electric field can have without...

*Saturday, September 19, 2015 by Anonymous*

**Physics**

A 11.0-ÂµF capacitor and a 50.0-ÂµF capacitor are charged by being connected across separate 55.0-V batteries. (a) Determine the resulting charge on each capacitor. (b) The capacitors are then disconnected from their batteries and connected to each ...

*Saturday, September 19, 2015 by Nick*

**physics**

In college softball, the distance from the pitcher's mound to the batter is 43 feet. If the ball leaves the bat at 105 mph, how much time elapses between the hit and the ball reaching the pitcher? I figured out how many ft there would be in a second, but I'm not so ...

*Friday, September 18, 2015 by Laura*

**Physics **

A boy threw a rock straight down from a tree top with a velocity of 5.00 m/s. If the rock struck the ground below 1.80 s later, what was its velocity at this time?

*Friday, September 18, 2015 by Kali*

**Physics**

Two airplanes leave an airport at the same time. The velocity of the first airplane is 730 m/h at a heading of 44.6 degrees. The velocity of the second is 610 m/h at a heading of 100 degrees. How far apart are they after 2.3 h? Answer in units of m.

*Friday, September 18, 2015 by Jeff*

**Physics**

An airplane flies at an airspeed of 445km/hr. The pilot wants to fly 785km to the north. She knows that she must head 18.0Â° east of north to fly directly there. If the plane arrives in 1.97hr, find the magnitude of the wind velocity vector.

*Friday, September 18, 2015 by Lash*

**Physics**

A ball on the end of a string is whirled around in a horizontal circle of radius 0.300m. The plane of the circle is 1.19m above the ground. The string breaks and the ball lands 1.91m (horizontally) away from the point on the ground directly beneath the ball's location when...

*Friday, September 18, 2015 by Lash*

**Physics**

A river flows with a uniform velocity v. A person in a motorboat travels 1.21km upstream, at which time she passes a log floating by. Always with the same throttle setting, the boater continues to travel upstream for another 52.6min and then returns downstream to her starting ...

*Friday, September 18, 2015 by Lash*

**Physics**

A child in danger of drowning in a river is being carried downstream by a current that has a speed of 2.60km/h. The child is 0.615km from shore and 0.815km upstream of a boat landing when a rescue boat sets out. If the boat proceeds at its maximum speed of 21.2km/h relative to...

*Friday, September 18, 2015 by Lash*

**Physics**

A basketball player throws the ball at a 47degree angle above the horizontal to a hoop which is located a horizontal distance L = 8.4 m from the point of release and at a height h = 2.7 m above it. What is the required speed if the basketball is to reach the hoop? I'm ...

*Friday, September 18, 2015 by Ido*

**Physics**

A student walks from her apartment a distance d=139m to the bus stop at a speed of v1= 1.40m/s. The she realizes that she has forgotten her crib sheet for her exam and so runs back to her apartment to pick it up and returns to the bus stop at a speed v2= 4.80m/s. What is her ...

*Friday, September 18, 2015 by Janine*

**Physics**

A student walks from her apartment a distance d=139m to the bus stop at a speed of v1= 1.40m/s.

*Friday, September 18, 2015 by Janine*

**physics **

If the print area of each tire of a car is 24 inch2 and the tire pressure is 30psi, what the weight of the car in pounds?

*Friday, September 18, 2015 by ryan*

**PHYSICS**

The position of a particle moving on a smooth horizontal floor is given as a function of time according to the equation x=ut+1/2at^2. At time t=0, the particle has the velocity u. Obtain an expression for the velocity as the function of time. Hence, find the value of this ...

*Friday, September 18, 2015 by BARNABAS*

**physics**

The thermal energy stored in 1 kg of gasoline is about 10,000 kcal (42,000,000 J). A small car needs a forward force of about 500 N to move slowly at a constant speed on a leveled road (no change in ME). How far should the car go if all the energy stored in 1 kg gasoline is ...

*Friday, September 18, 2015 by Jane*

**physics**

A plane accelerates from rest at a constant rate of 5.00 m/s2 along a runway that is 1800 m long. Assume that the plane reaches the required takeoff velocity at the end of the runway. What is the time tTO needed to take off?

*Friday, September 18, 2015 by Aly*

**Physics **

A car start from rest, moves with uniform acceleration and attains a velocity of 72km/h in 1.5 s it moves with uniform speed for 20 s and is then brought to rest in 10 s under uniform retardation, then total distance travelled using velocity -time graph is?

*Friday, September 18, 2015 by Devyani *

**physics**

A ball is kicked with an initial velocity of 16.1 m/s in the horizontal direction and 14.4 m/s in the vertical direction. What maximum height is attained by the ball?

*Friday, September 18, 2015 by Urgent*

**physics**

a car moves at a constant speed of 60 km/hr for 1 km and 40 km/hr for 1 km.what is average speed of car?

*Friday, September 18, 2015 by tushar*

**Physics - URGENT**

A water balloon is launched at a speed of 23 m/s and an angle of 36 degrees above the horizontal. The water balloon hits a tall building located 20 m from the launch pad. At what height above the ground level will the water balloon hit the building? Calculate the answer in ...

*Friday, September 18, 2015 by Anonymous*

**physics**

A particle accelerates from rest at a uniform rate of 3 m/s^2 for a distance of 200m. -how fast s the particle going at that time? -how long did it take for the particle to reach that velocity?

*Friday, September 18, 2015 by karen*

**physics**

A child on a sled (total mass 41 kg) slides down a hill inclined at an angle θ = 22Â° at a constant speed 3.5 m/s. (a) How long does it take the child to travel 40 meters down the slope? (b) What is the frictional force on the sled? (c) What is the coefficient ...

*Friday, September 18, 2015 by Manny*

**Physics**

Two hikers are climbing up a mountain and one throws a first aid kit up to another at an initial velocity of 11 m/s and at an angle of 62 deg above the horizontal. At the moment it is caught, the vertical speed is zero. What is the difference in height between the two climbers...

*Thursday, September 17, 2015 by Sarah*

**Physics**

An aerialist on a high platform holds onto a trapeze attached to a support by an 9.8-m cord. (See the drawing.) Just before he jumps off the platform, the cord makes an angle of 37Â° with the vertical. He jumps, swings down, then back up, releasing the trapeze at the...

*Thursday, September 17, 2015 by Kevin*

**Physics (cone in water) buoyancy **

h ttps ://s.yimg . com /hd/ answers /i /23e5f0847 ba74d75b223556433442f6f_A.jpeg?a=answers&mr= 0&x=1442542068&s =0f4a516a 3f24689d44f 28091e846bb0d link to see part a answer and an image of what is problem is. A cone of density p_0 (rho) and total height l floats in a ...

*Thursday, September 17, 2015 by Jason*

**Physics**

In a 5.00 km race, one runner runs at a steady 11.8 km/h and another runs at 14.7 km/h . How long does the faster runner have to wait at the finish line to see the slower runner cross?

*Thursday, September 17, 2015 by Nancy*

**physics**

An elephant walks east for a distance of 58 km, then walks north for a distance of 16 km and finally north east at 300 for 15 km. Find the magnitude of the elephantâ€™s total displacement in kilometers. now would i find the change in distance by subtracting ...

*Thursday, September 17, 2015 by Kim*

**Physics**

A Formula 1 car it heading for a straight piece of track which is 500m long. He is travelling at 220km/h. How long will he take to cover this amount of track? Time = Distance / Speed I'm confused as I don't know whether to change the distance to equal the speed's ...

*Thursday, September 17, 2015 by Alex*

**physics**

whn a body hanging frm a spring balance is immersed in water it floats in water just below the surface of water & shows 100g loss in its weight 1-wht is thw weight of body in water? 2-wht is thw weight of body in air 3-wht is upthrust on the body? 4-wht is the vol. of body? ...

*Thursday, September 17, 2015 by Riya sood*

**physics **

Three positive point charges of 3.0 nC, 6.0 nC, and 2.0 nC, respectively, are arranged in a triangular pattern, as shown below. Find the magnitude and direction of the electric force acting on the 6.0 nC charge.

*Thursday, September 17, 2015 by Anonymous*

**physics**

if 8.96dm of CO is produced at STP -how many moles of CaCO3 have reacted

*Thursday, September 17, 2015 by loot barny*

**physics**

Results for: In An Ideal Transformer, The Voltage And Current Are 220V,2A And Those In Secondry Are 2000V, IA. The Value Of I Is?

*Thursday, September 17, 2015 by ansa*

**Physics**

A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 17.0 m/s when the hand is 1.50 m above the ground. How long is the ball in the air before it hits the ground? (The student moves her hand out of the way.)

*Thursday, September 17, 2015 by Erika*

**Physics**

suppose you want to design a capacitor that uses mica as the dielectric material which has K = 7 and a dielectric strength of 150 MV/m. It is intended to store at least 1.- J of energy and be able to withstand a voltage up to 250 volts without electric breakdown. a) What is ...

*Wednesday, September 16, 2015 by Heidi*

**Physics**

A projectile of mass 0.413 kg is shot from a cannon, at height 6.8 m, with an initial velocity vi having a horizontal component of 7.5m/s. The projectile rises to a maximum height of ∆y above the end of the cannonâ€™s barrel and strikes the ground a ...

*Wednesday, September 16, 2015 by Joseph*

**Physics**

A train is traveling south at 23.5 m/s when the brakes are applied. It slows down with a constant rate to a speed of 5.01 m/s in a time of 8.73 s. How far does the train travel during the 8.73 s? I have already found -Acceleration during braking: -2.12m/s

*Wednesday, September 16, 2015 by Ethan*

**Physics**

suppose you want to design a capacitor that uses mica as the dielectric material which has K = 7 and a dielectric strength of 150 MV/m. It is intended to store at least 1.- J of energy and be able to withstand a voltage up to 250 volts without electric breakdown. a) What is ...

*Wednesday, September 16, 2015 by Heidi*

**Physics**

vector r and s lie on an xy plane. magnitudes of 4.5 and 7.25, respecectively directions are 320 degrees and 685 degrees. What is vector r cross product of vector s?

*Wednesday, September 16, 2015 by Kyle*

**Physics**

A military jet fighter plane flying at 180m/s pulls out of a vertical dive by turning upward along a circular path of radius 860m. What is the acceleration of the plane? Express the acceleration as a multiple ofg.

*Wednesday, September 16, 2015 by Anonymous*

**physics**

A high fountain of water is located at the center of a circular pool as shown in the figure below. Not wishing to get his feet wet, a student walks around the pool and measures its circumference to be 29.0 m. Next, the student stands at the edge of the pool and uses a ...

*Wednesday, September 16, 2015 by lily*

**Physics**

Determine the direction of frictional forces (left, right, up down) for the objects: 1) A cup resting on top of a car. The car is moving and accelerating to the right. Up - This one I'm not sure but I think up because the frictional force would have to go up to hold the ...

*Wednesday, September 16, 2015 by Rebecca*

**physics**

A sports car, traveling 30 m/s, is 220 meters behind a truck. If the truck is traveling 22 m/s, how much time until the sports car passes the truck.

*Wednesday, September 16, 2015 by Emma*

**PHYSICS**

The figure shows two displacement vectors and . Vector points at an angle of 20.0Â° above the x axis and has an unknown magnitude. Vector has an x component Bx = 31.0 m and has an unknown y component By. These two vectors are equal. Find (a) the magnitude of and (b) ...

*Wednesday, September 16, 2015 by Anonymous*

**PHYSICS**

An aerialist on a high platform holds onto a trapeze attached to a support by an 7.9-m cord. (See the drawing.) Just before he jumps off the platform, the cord makes an angle of 37Â° with the vertical. He jumps, swings down, then back up, releasing the trapeze at the...

*Wednesday, September 16, 2015 by Anonymous*

**Physics**

You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.5 m above the ground, and it is moving at a speed of 7.8 m/s. (a) How much time does it take for the tennis ball to reach its maximum height? (b) What is the maximum height above ...

*Wednesday, September 16, 2015 by James*

**physics **

One simple model for a person running the 100m dash is to assume the sprinter runs with constant acceleration until reaching top speed,then maintains that seed through the finish line.if sprinter reaches his top speed of 11.1m/s in 2.54s. What will be his total time?

*Wednesday, September 16, 2015 by Lucas*

**physics**

A quarterback takes the ball from the line of scrimmage, runs backward for 18.0 yards, then runs sideways parallel to the line of scrimmage for 16.0 yards. At this point, he throws a 49.0-yard forward pass straight down the field. What is the magnitude of the footballâ&#...

*Wednesday, September 16, 2015 by james *

**physics**

Vector B~ has x, y, and z components of 9.6, 6, and 8.5 units, respectively. Calculate the magnitude of B~ .

*Wednesday, September 16, 2015 by james *

**Physics **

A storage battery has an emf of 6.3 volts and an internal resistance of 0.01 ohm. it is to be charged for 120 amperes.hours from a 30 volt emf source having a resistance of 0.08 ohm at the rate of 20 amperes. a. compute for the resistance needed b. what is the cost of ...

*Wednesday, September 16, 2015 by Frank*

**Physics**

The magnitudes of the four displacement vectors shown in the drawing are A = 14.0 m, B = 11.0 m, C = 12.0 m, and D = 25.0 m. Determine the (a) magnitude and (b) direction for the resultant that occurs when these vectors are added together. Specify the direction as a positive (...

*Wednesday, September 16, 2015 by Rachel*

**Physics**

the weight of the body on the surface of earth is 392N what will be the weight of this body in another body whose mass is double of earth mass and radius is fourth multiple of earth radius?

*Wednesday, September 16, 2015 by Priyank*

**Physics**

A metallic wire of density d floats horizontally in water . The maximum radius of wire so that it may not sink in water will be ??

*Wednesday, September 16, 2015 by Anonymous*

**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 53.5 m/s. At what speed does the vehicle move along its descent path? Answer in units of m/s.

*Wednesday, September 16, 2015 by james *

**physics**

Bob heads out into a lake at an angle of 27◦ with respect to the shore. If his boat is capable of a speed of 1.3 m/s, how far from land will he be in 2 min and 28 s ? Answer in units of m.

*Wednesday, September 16, 2015 by james *

**Physics - URGENT**

A ball is thrown horizontally of a cliff. If the initial speed of the ball is 17 m/s and the cliff is 77 m high, how far from the base of the cliff will the ball land in the water below? Calculate the answer in meters (m) and rounded to three significant figures.

*Wednesday, September 16, 2015 by Anonymous*

**physics **

A 10.0 microCoulomb point charge is fixed in place at the origin. A 2.00-microCoulomb point charge is released from rest at x = 0.500 m. Because of the repulsive force between the two point charges, the 2.00-microCoulomb charge is accelerated in the +x direction. What is the ...

*Tuesday, September 15, 2015 by anna*

**physics**

An object is thrown downward with an initial speed of 15 m/s from a height of 85 m above the ground. At the same instant, a second object is propelled vertically up from ground level with a speed of 29 m/s. At what height above the ground will the two objects pass each other? ...

*Tuesday, September 15, 2015 by Lake*

**physics **

Influenced by the gravitational pull of a distant star, the velocity of an asteroid changes from from +19.0 km/s to −19.4 km/s over a period of 1.85 years. (a) What is the total change in the asteroid's velocity? (Indicate the direction with the sign of your answer...

*Tuesday, September 15, 2015 by Brett*

**Physics**

At what upstream angle must the swimmer aim, if she is to arrive at a point directly across the stream of a 42-m-wide river whose current is 0.50 m/s? A swimmer is capable of swimming 0.62m/s in still water.

*Tuesday, September 15, 2015 by Anonymous*

**Physics**

A bicycle racer sprints near the end of a race to clinch a victory. The racer has an initial velocity of 10.3 m/s and accelerates at the rate of 0.370 m/s2 for 7.01 s. What is his final velocity? a) 12.9 m/s The racer continues at this velocity to the finish line. If he was ...

*Tuesday, September 15, 2015 by Rebecca*

**PHYSICS**

While following the directions on a treasure map, a pirate walks 25.2 m north, then turns and walks 4.4 m east. What is the magnitude of the single straight-line displacement that the pirate could have taken to reach the treasure? Answer in units of m.

*Tuesday, September 15, 2015 by Crystal*

**PLEASE- physics**

You are standing at the top of a cliff that has a stairstep configuration. There is a vertical drop of 6 m at your feet, then a horizontal shelf of 10 m, then another drop of 4 m to the bottom of the canyon, which has a horizontal floor. You kick a 0.76 kg rock, giving it an ...

*Tuesday, September 15, 2015 by Anonymous *

**Physics**

Suppose you throw a ball up in the air and it stops rising after 1.5 seconds. the initial speed of the ball is

*Tuesday, September 15, 2015 by Sthefania*