Wednesday

October 26, 2016
**Physics**

An electric dipole p-> (-> is vector symbol) where p-> = (5x10^-15 C m, -5x10^-15 C m, 0 C m) located at r-> = (0 m, -0.005 m, 0m) Q = 1x10^-6 C at origin. What's the torque on the dipole?

*Saturday, September 24, 2016 by Jan*

**Physics**

You are walking a dog when the dog sees a cat and runs away from you. You immediately run after the dog at 4.90 m/s. You jump at an angle of 30.0° to try and catch the dog. While you are in the air the dog is able to move an extra 1.72 m away from you. If you are able to ...

*Saturday, September 24, 2016 by Tom*

**Physics**

Block A (Mass = 3.500 kg) and Block B (Mass = 2.450 kg) are attached by a massless string Block A sits on a horizontal tabletop. There is friction between the surface and Block A. The string passes overa frictionless, massless pulley. Block B hangs down vertically as shown. ...

*Saturday, September 24, 2016 by ASak*

**Physics**

Two kittens are running toward each other, one is named Chloe and the other is named Luna. Chloe runs at a speed of 2.00 m/s and Luna runs at a speed of 1.20 m/s. If Chloe jumps at an angle of 37.0° while still running toward Luna, at what distance from Luna should Chloe ...

*Saturday, September 24, 2016 by Brooklyn*

**Physics**

A BMX rider is coming up to a ramp that is set to 23.0° and the end point is 1.60 m above the ground. They travel up the ramp at a steady speed of 9.20 m/s. What speed will they have just before they hit the ground?

*Saturday, September 24, 2016 by Brooklyn*

**Physics**

Block A (Mass = 3.146 kg) and Block B (Mass = 2.330 kg) are attached by a massless string Block A sits on a horizontal tabletop. There is friction between the surface and Block A. The string passes overa frictionless, massless pulley. Block B hangs down vertically as shown. ...

*Saturday, September 24, 2016 by Quaz*

**Physics**

"You can jump 2 feet vertically on Earth. Figure out how high you would be able to jump on the Moon, where acceleration due to gravity is ⅙ that of Earth. Assume you launch upwards with the same speed on the Moon as you do on the Earth." I've already ...

*Saturday, September 24, 2016 by BunBun*

**Physics**

You are walking a dog when the dog sees a cat and runs away from you. You immediately run after the dog at 4.20 m/s. You jump at an angle of 28.0° to try and catch the dog. While you are in the air the dog is able to move an extra 1.57 m away from you. If you are able to ...

*Saturday, September 24, 2016 by Brooklyn*

**Physics**

A fired bullet sounds is heard after2sec .its speed in air is 340m\sec.what is the distance of sound.

*Saturday, September 24, 2016 by Pratham*

**Physics **

A 40 tonne jumbo jet accelerates down the runway at 5 m/s^2. What must be the thrust on each of its four engines? What is the horizontal force that a 700 N pilot exerts on his seat?

*Saturday, September 24, 2016 by Jadon*

**physics **

Hello everyone I'm working on this problem and I need some clarification. A 40 tonne jumbo jet accelerates down the runway at 5 m/s^2. What must be the thrust on each of its four engines? What is the horizontal force that a 700 N pilot exerts on his seat? I can calculate ...

*Saturday, September 24, 2016 by Jadon*

**Physics**

An arrow is shot from a height of 1.4 m toward a cliff of height H. It is shot with a velocity of 28 m/s at an angle of 60° above the horizontal. It lands on the top edge of the cliff 3.6 s later. a) What is the height of the cliff (in m)? I got 25.191 m and thats the ...

*Friday, September 23, 2016 by A*

**Physics**

Christiano Ronaldo kicks a soccer ball with an initial velocity of 24.0 m/s at an angle of 25.0°. How far away does the ball land?

*Friday, September 23, 2016 by Brooklyn*

**Physics**

A dart is being thrown at a board that is 2.80 m away. When it hits the board it is 0.486 m below the point where it was aimed and it was thrown at 8.90 m/s. How long was the dart in the air?

*Friday, September 23, 2016 by Brooklyn*

**Physics**

At an instant when a soccer ball is in contact with the foot of the player kicking it, the horizontal or x component of the ball's acceleration is 930 m/s2 and the vertical or y component of its acceleration is 930 m/s2. The ball's mass is 0.39 kg. What is the ...

*Friday, September 23, 2016 by BrookeNeed*

**Physics**

A box of mass m slides down an inclined plane that makes an angle of φ with the horizontal. If the coefficient of kinetic friction is μk, find an expression for the acceleration of the box down the slope. The acceleration due to gravity is g. a. g ( cosφ + μ...

*Friday, September 23, 2016 by Tom*

**Physics**

A car of mass accelerates from rest to a speed in time with negligible friction and air resistance. What is an expression for the average power delivered by the car's engine? a) Mv22t b) Mv2t c) Mvt D) Mv2t

*Friday, September 23, 2016 by Jared*

**Physics**

A person in a kayak starts paddling, and it accelerates from 0 to 0.568 m/s in a distance of 0.389 m. If the combined mass of the person and the kayak is 79.5 kg, what is the magnitude of the net force acting on the kayak?

*Friday, September 23, 2016 by BrookeNeed*

**physics**

A baseball has a mass of 145 g. A bat exerts a force of 18,400 N on the ball. What is the acceleration of the ball

*Friday, September 23, 2016 by keke*

**physics**

a stone is thrown vertically upward an initial velocity of 12m/s from the top of a building . it takes 3.4s for the stone to hit the ground a. find the height of the building b. find the maximum height that the stone will reach c. find the speed of the stone when it reaches ...

*Friday, September 23, 2016 by khadija*

**Physics**

Keisha throws a baseball with an initial velocity of 30 m/s at 30.0° above the horizontal. If air resistance is negligible, how long does it take for the baseball to reach the maximum height of its trajectory? Assume that the acceleration due to gravity is given by: g = 10...

*Friday, September 23, 2016 by Jared*

**Physics**

A large engine with mass of 400 kg must be lifted 3 meters out of a truck for repair. A normal mechanic can lift with about 250 N of pulling force. They use a system of pulleys to do this. If we assume the engine starts on the ground, how long must the ropes be on the pulley ...

*Friday, September 23, 2016 by PizzaIsYum*

**Physics**

If C⃗ = -5 i^ - 3 j^ - 4 k^, what is C⃗ × j^?

*Friday, September 23, 2016 by Tom*

**physics**

An electron with a speed of 1.9 × 107 m/s moves horizontally into a region where a constant vertical force of 6.0 × 10-16 N acts on it. The mass of the electron is 9.11 × 10-31 kg. Determine the vertical distance the electron is deflected during the time it ...

*Friday, September 23, 2016 by bigd*

**Physics**

Given the masses of the sun and earth are 1.99x10^30 kg and 5.98x10^24 kg respectively. Calculate the gravitational force between them when their centers are 1.50x10^11m apart

*Friday, September 23, 2016 by Yasmin*

**Physics **

If a man is able to row at 5m/s in still water and he points his boat at a 50 degree angle from the shore in an upstream direction in a river that's flowing at 4 m/s how far, either up or downstream will be land on the other side of the river if the river is 45n across?

*Friday, September 23, 2016 by Lyssa*

**physics**

A bullet leaves a rifle with a muzzle velocity of 553 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 0.648 m. Determine the acceleration of the bullet (assume a uniform acceleration).

*Thursday, September 22, 2016 by sally*

**PHYSICS**

does an object speed up or slow down when: 1. its velocity is positive (right) and its acceleration is positive (right)? I said it speeds up 2. its velocity is positive (right) and its acceleration is negative (left)? I said it slows down 3. its velocity is negative (left) and...

*Thursday, September 22, 2016 by Matt*

**Physics**

You are testing a car on the Nevada salt flats traveling 85 m/s. Your parachute deploys and you decelerate at 13 m/s^2. How long does it take to come to a complete stop?

*Thursday, September 22, 2016 by Kay *

**Physics **

a person pushes a 8 kg cart up a 13 degree incline. Find the magnitude of the horizontal force needed to give the cart an acceleration of 1.55 m/s^2.

*Thursday, September 22, 2016 by Gilberto *

**Physics**

An object is thrown up in the air at 15 meters per second. You want to figure out how high the object will be at 2.5 seconds after its release. Use the 5 motion variables and list the values and directions of the variables already known. Use a motion equation to find the ...

*Thursday, September 22, 2016 by Anonymous*

**Physics (Sound)**

Cellist Yo-Yo Ma plays a note at 250 Hz. A studio technician performs an analysis of the frequency spectrum and reports that she measured the SIL of its peaks (those of the frequency spectrum): 63 dB at 250 Hz, 58 dB at 500 Hz, 56 dB at 750 Hz, and 51 dB at 1000 Hz. Assuming ...

*Thursday, September 22, 2016 by Tony*

**physics**

You push a skateboard so that it rolls down the road at a speed of 1.40 m/s. You run after the skateboard at a speed of 3.80 m/s and while still behind the skateboard you jump off the ground at an angle of 30.0° above the horizontal hoping to land on the skateboard. How ...

*Thursday, September 22, 2016 by p*

**Physics **

If a ball is thrown off a 123 m cliff at a speed of 18 m/s, how far from the base of the diff is the ball? Givens: Unknown: Equation: Substitute: Solve:

*Thursday, September 22, 2016 by Anonymous*

**Physics **

What happens to an object which is initially stationary, if a non-zero resultant force acts on it? Thanks.

*Thursday, September 22, 2016 by Anonymous123*

**physics sir damon help**

a uniform disk of moment of inertia 75kgm^2 and radius of gyration 3m rotates with an angular velocity of 2rad/s. determine d : mass , radius , angular momentum . . and . . kinetic energy of d disk . . . .

*Thursday, September 22, 2016 by samson*

**Physics science - forces**

A jet plane lands on a runway and decelerate so to rest. What can you say about the direction of the resultant force on the ane as it decelerates? What can yu say about the resultant force acting on the plane as it has come to rest? Many thanks.

*Thursday, September 22, 2016 by Anonymous123*

**physics**

A rope of mass M uniformly distributed along its length L ,can slide without friction on a horizontal table. At instant to=0 the hanging part of the rope has a length b and the rope is held at rest .When it is left the rope begins to slide. At instant t the part of the rope ...

*Thursday, September 22, 2016 by vicky*

**Physics **

Jennifer swims 4 complete lengths of a 50m pool. What distance did she swim? What is her displacement?

*Thursday, September 22, 2016 by Anonymous*

**physics**

A bead slides on the frictionless wire as shown in the figure attached. If the speed of the beead is 2.0 m/s when its at A, how fast will the bead be going at point B and at point C?

*Thursday, September 22, 2016 by lex*

**Physics **

A tropical cyclone with wind speed of 170km/h. "Estimate the air pressure at the eye of the cyclone." Assuming that: *it is a laminar flow of air *wind speed outside the cyclone is zero. * the pressure is at normal atm pressure outside the cyclone. *measurement taken...

*Thursday, September 22, 2016 by Britney *

**physics**

You walk for 6.44 km with at a constant velocity of 2.55 m/s due west, turn around, and then walk with an average velocity of 0.440 m/s due east. From your starting point to your destination, your overall average velocity is 1.33 m/s due west. During the trip, how far east did...

*Thursday, September 22, 2016 by max*

**AP physics **

Two planes approach each other head-on. Each has a speed of 780 km/hour,and they spot each other when they are 10.0 km apart. How much time do the pilots have to take evasive action?

*Wednesday, September 21, 2016 by Susana *

**Physics **

A painter of mass 80.0 kg stands on a platform of mass 75.0 kg and pulls on two ropes which hang over pulleys, as shown. He pulls each rope with a force of 400.0 N. Assuming a coordinate system where +y is up, calculate the y-component of the acceleration ay. ay can either be ...

*Wednesday, September 21, 2016 by Ashley*

**AP physics **

A person going for a morning jog an the deck of a cruise ship is running toward the bow (front) of the ship at 2.0m/s while the ship is moving ahead at 8.5m/s. What is the velocity of the jogger relative to the water? Later, the jogger is moving toward the stern (rear) of the ...

*Wednesday, September 21, 2016 by Susana *

**Physics **

A 70kg wannabe stuntman at the edge of a roof top jumps vertical up with a speed of 4m/s and falls on a trampoline 2meters below where he started. If the trampoline acts like a Hooke's spring and does a maximum extension of 0.284m going down towards ground, what is the ...

*Wednesday, September 21, 2016 by Veronica *

**Physics**

A small child is learning to ride a bike for the first time. Her dad decides it would be a good idea to start her on a small hill. The hill is inclined at 3.30° to the horizontal. The child starts partway down the hill, 9.00 m away from her dad, who stays at the top. She ...

*Wednesday, September 21, 2016 by Mathew*

**Physics**

While curling, you push a rock for 1.70 m and release it when it has a speed of 1.70 m/s. It continues to slide at constant speed for 0.700 s and then hits a rough patch of ice. It finally comes to rest 9.20 m from where it was released.

*Wednesday, September 21, 2016 by Jenny*

**science(physics)**

A powerful motorcycle can accelerate from rest to 28m/s in only 4 second . a.what is its average acceleration? b.how far does it travel in that time

*Wednesday, September 21, 2016 by nancy*

**AP physics **

A rescue plane wants to drop supplies to isolated mountains climbers on Rocky ridge 235m below. If the plane is traveling horizontally with a speed of 250 km/h (69.4m/s), how far in advance of the recipients (horizontal distance) must the good be dropped? "Dropped" (...

*Wednesday, September 21, 2016 by Susana *

**Physics**

A superhero flies 285 m from the top of a tall building at an angle of 20 ◦ below the horizontal. What is the horizontal component of the superhero’s displacement? What is the vertical component of the superhero’s displacement?

*Wednesday, September 21, 2016 by RK*

**physics**

A roller coaster is on a flat track heading towards an incline, moving at 4.80 m/s. After it has gone down the 66.0° incline (measured from the horizontal), the roller coaster is now going at a speed of 23.3 m/s. What is the length of the incline?

*Wednesday, September 21, 2016 by masla*

**Physics**

A car has an initial velocity of 45m/s and a final velocity of 0m/s 9 seconds later. A. What is the Acceleration? B. How far did they travel during the 9s?

*Wednesday, September 21, 2016 by Alysa*

**physics**

A pitcher throws a baseball horizontally from the mound to home plate. The ball falls 0.868 m (2.85 ft) by the time it reaches home plate 18.3 m (60 ft) away. How fast was the pitcher's pitch?

*Wednesday, September 21, 2016 by Anon*

**physics**

Block A (Mass = 5.195 kg) and Block B (Mass = 3.330 kg) are attached by a massless string as shown in the diagram. Block A sits on a horizontal tabletop. There is friction between the surface and Block A. The string passes over (you guessed it) a frictionless, massless pulley...

*Wednesday, September 21, 2016 by taylor*

**Physics**

You are thinking about taking gymnastics, so you go to the facility and get an idea of what to expect by looking out from the viewing room. The viewing room window is 1.50 m above the trampoline directly below, so it is perfect for viewing the the facility. Occasionally ...

*Wednesday, September 21, 2016 by Brooklyn*

**Physics **

You're driving parallel to train tracks at 52.0 km/h when a train passes you, going a steady 91.0 km/h. A track crossing is up ahead, so you begin to speed up at 8.00 m/s2. How far do you drive before you pass the train?

*Wednesday, September 21, 2016 by Dana*

**Physics**

At a track and field meet, the best long jump is measured as 8.30 m. The jumper took off at an angle of 31 ° to the horizontal. What was the jumper’s initial speed?

*Wednesday, September 21, 2016 by Bex*

**PHYSICS**

looking over the edge of a cliff, you become curious as to how high up you are. you take a rock and drop it over the edge and count. The rock strikes the ground in between 3 and 4 of your count. so let's estimate that it took 3.5s for it to hit the ground. using the bottom...

*Wednesday, September 21, 2016 by Matt*

**physics**

A car is driving in the negative X direction at a steady speed of 15 m/s. if it starts at a position of 30m: What is its displacement in the first second? My answer was 15m and used Xf-Xo (final-initial) to find the displacement What is his displacement in the first two ...

*Wednesday, September 21, 2016 by Matt*

**physics**

A riverboat travels with a velocity of 4.60 m/s from one shore to another. The velocity of the river is 2.30 m/s. If the width of the river is 72.0 m, how far does the boat travel downstream to reach the other shore?

*Wednesday, September 21, 2016 by jh*

**Physics**

A model rocket is launched at 62 degrees above the horizontal with an initial speed of 28m/s. the rocket travels for 4.5s along its initial line of motion with a constant acceleration of 13 m/s^2. At this time, the engine of the rocket stops and the rocket proceeds to move as ...

*Wednesday, September 21, 2016 by Bethany*

**physics**

A pendulum is formed of a particle of mass 100g suspended from the end of an inextensible string of negligible mass and of length L=100cm. The pendulum is shifted by an angle of 60 degrees from its equilibrium position about a horizontal axis passing through the other end of ...

*Wednesday, September 21, 2016 by vicky*

**Physics**

While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 6.87 m/s. The stone subsequently falls to the ground, which is 13.5 m below the point where the stone leaves your hand. At what speed does the stone impact the ground? How ...

*Wednesday, September 21, 2016 by Anonymous*

**physics**

we launched a solid of mass m on an inclined slide. The natural length of the spring is Lo. Before launching, the spring is compressed to a length L. After launching the center of mass of the solid reaches the point A of altitude Z with velocity v. Neglect friction. a) ...

*Wednesday, September 21, 2016 by vicky*

**physics**

A pendulum is formed of a particle of mass 100g suspended from the end of an inextensible string of negligible mass and of length L=100cm. The pendulum is shifted by an angle of 60 degrees from its equilibrium position about a horizontal axis passing through the other end of ...

*Wednesday, September 21, 2016 by vicky*

**Physics**

If C⃗ = -5 i^ - 3 j^ - 4 k^, what is C⃗ × j^? If = -5 - 3 - 4 , what is × ?

*Wednesday, September 21, 2016 by Brian*

**Physics**

What is the airspeed relative to the ground of an airplane with an airspeed of 120km/h when it is in a 90-km/h crosswind?

*Wednesday, September 21, 2016 by Samantha*

**Physics**

The system starts at rest. A mass of 20kg (m1) is connected to a pulley of uniform mass m=5kg and radius 10cm and a mass of 30kg (m2) hangs on the other side of the pulley hanging 2m above the ledge Find the tension of the strings I tried to find the acceleration by finding ...

*Wednesday, September 21, 2016 by Maddi*

**Physics **

A 70kg wannabe stuntman at the edge of a roof top jumps vertical up with a speed of 4m/s and falls on a trampoline 2meters below where he started. If the trampoline acts like a Hooke's spring and does a maximum extension of 0.284m going down towards ground, what is the ...

*Wednesday, September 21, 2016 by Veronica *

**Physics **

a solid of density 2700 kg/m³ and volume 0.0015 m³ is completely immersed in alcohol of density 800kg/m³.Calculate: 1) weight on solid in SI system 2) upthrust on solid in SI system 3) apparent weight of solid in alcohol 4) will the apparent weight of solid be ...

*Wednesday, September 21, 2016 by Khushi *

**physics**

A joggler throws an apple vertically upward just enough to reach the ceiling exactly 4 meters from the jogglers hand . What is the initial velocity of the apple ?

*Wednesday, September 21, 2016 by please help*

**Physics**

A racing car of mass 850 kg accelerates from 20 km/h to 160 km/h over a distance of 300 metres. Frictional forces and wind resistance can be assumed to be 800N. Determine the following: (i)The average acceleration (ii)The time taken to accelerate from 20 km/h to 160 km/h (iii)...

*Wednesday, September 21, 2016 by J.Kruger*

**Physics**

A vehicle of mass 1200 kg accelerates uniformly from rest to a velocity of 15 m/s in 5 seconds. It continues at this velocity for 15 seconds before decelerating uniformly at a rate of 5m/s2 to rest. Determine the following: (i)The acceleration (ii)The time taken to decelerate ...

*Wednesday, September 21, 2016 by J.Kruger*

**physics**

if mass is not an issue then how much force is required to move a ten no. 'shake flashlight' .will it be equal to move a single flashlight or will have to work ten times more to shake these ten flashlights? Note these flashlights are based on magnetic induction

*Wednesday, September 21, 2016 by vikram*

**physics**

an object of height 5cm is placed 20cm in front of a concave mirror of radius of curvature 20cm by graphical method, find image distance from the mirror

*Wednesday, September 21, 2016 by mark *

**physics**

a baseball is batted with a speed of 120 ft/sec at an angle of 37 degrees with the ground. find how long the ball is in the air, how high the ball goes, how far from the plate it is caught, and the components of the velocity of the ball 4 sec after it is hit.

*Wednesday, September 21, 2016 by kim*

**mathematical physics**

For a scaler field ϕ(x, y, z) = x^n+y^n+z^n, show that (🔻ϕ ).r = nϕ , where n is a non-zero real constant.

*Wednesday, September 21, 2016 by gourav bhardwaj*

**mathematical physics**

A metal sheet has ,on the average , 5 defects per 1.0 m^2. Assuming a poisson distribution , calculate the probability that a 1.5 m^2 piece of the metal sheet will have at least 4 defects.

*Wednesday, September 21, 2016 by gourav bhardwaj*

**physics**

A car is traveling along a straight road at a velocity of +35.1 m/s when its engine cuts out. For the next 1.95 seconds, the car slows down, and its average acceleration is . For the next 6.52 seconds, the car slows down further, and its average acceleration is . The velocity ...

*Tuesday, September 20, 2016 by Tamara*

**AP physics **

A student preformed a sphere drop experiment from 1.50m above ground and the sphere has a mass of 0.875kg. Free fall times for the students experiment are below. Calculate the average acceleration due to gravity from the students data. Free fall times (s) 0.553 0.700 0.557 0....

*Tuesday, September 20, 2016 by Susana *

**Physics**

A car traveling in a straight line has a velocity of 3.7 m/s at some instant. After 7.99 s, its velocity is 12.2 m/s. What is its average acceleration in this time interval? Answer in units of m/s 2

*Tuesday, September 20, 2016 by Ari*

**Physics**

Initially (at time t = 0) a particle is moving vertically at 7.2 m/s and horizontally at 0 m/s. Its horizontal acceleration is 1.3 m/s 2 . At what time will the particle be traveling at 59◦ with respect to the horizontal? The acceleration due to gravity is 9.8 m/s 2 . ...

*Tuesday, September 20, 2016 by Nicole*

**Physics**

A car accelerates uniformly in a straight line from rest at the rate of 3.6 m/s2 . What is the speed of the car after it has traveled 61 m? Answer in units of m/s

*Tuesday, September 20, 2016 by Ari*

**AP physics **

Galileo carried out his seminal free-fall experiment using and incline plane. Why is such and approach feasible,and sometimes preferable to the simple drop meathod, for determining g?

*Tuesday, September 20, 2016 by Susana *

**physics**

A person takes a trip, driving with a constant speed of 99.5 km/h, except for a 24.0-min rest stop. The person's average speed is 66.4 km/h. how far does the person travel?

*Tuesday, September 20, 2016 by keana dallas*

**Physics**

If a subway train is moving to the left (has a negative velocity) and then comes to a stop, what is the direction of its acceleration? Is the acceleration positive or negative?

*Tuesday, September 20, 2016 by Haaris*

**Physics**

A=vf-vi÷t

*Tuesday, September 20, 2016 by Messiah*

**Physics**

A ball is rolling on a table with a horizontal velocity of 5 m/s when it rolls off the edge. How far from the base of the table does the ball land in the table is 0.8 m tall?

*Tuesday, September 20, 2016 by Ryan*

**physics**

Two particles A and B of respective masses M(B) and M(A) are connected together by means of an inextensible string of negligible mass. The string passes over the groove of a pulley of negligible mass. At instant to=0 the system S(pulley,mass,string) is left without initial ...

*Tuesday, September 20, 2016 by vicky*

**physics**

A particle C can move along a slide placed in a vertical plane. Points A and B are at the same horizontal level. Determine with respect to B the point where the velocity of C is zero for the first time in the three following cases: a) C is released from A without initial ...

*Tuesday, September 20, 2016 by vicky*

**Physics **

A Dare daredevil wants to jump his motorcycle across a 50 m Canyon a) If his speed is 30m/s and a ramp angle is 50 degrees where should the landing ramp be placed? b) With the same ramp what initial speed should he have if the landing ramp is 10 m from the far edge

*Monday, September 19, 2016 by Vanessa*

**Physics**

A woman stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.70 of her regular weight. 1).Calculate the magnitude of the acceleration of the elevator. Express your answer to two significant figures and include ...

*Monday, September 19, 2016 by Alex*

**physics**

As two trains move along a track, their conductors suddenly notice that they are headed toward each other. The figure gives their velocities v as functions of time t as the conductors slow the trains. The figure's vertical scaling is set by vs = 40.0 m/s. The slowing ...

*Monday, September 19, 2016 by fotran God*

**physics**

A car accelerates uniformly in a straight line from rest at the rate of 3.9 m/s2 . What is the speed of the car after it has traveled 56 m? Answer in units of m/s.

*Monday, September 19, 2016 by haven*

**physics**

A flowerpot falls from a window sill 27.7 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.

*Monday, September 19, 2016 by haven*

**physics**

An electric vehicle starts from rest and accelerates at a rate of 2.3 m/s2 in a straight line until it reaches a speed of 24 m/s. The vehicle then slows at a constant rate of 1.5 m/s2 until it stops. (a) How much time elapses from start to stop? (b) How far does the vehicle ...

*Monday, September 19, 2016 by fotran God*

**Physics**

A ball thrown horizontally from a point 26.0 m above the ground strikes the ground after travelling a horizontal distance of 23.0 m. With what speed was it thrown? Which equation should I use? V= DeltaX / Delta T A= Delta V / Delta T Horizontal motion where X= Xo + Vx(T)

*Monday, September 19, 2016 by Bex*

**Physics**

Sam and Terry find a 30.0 m deep wishing well and decide to make a wish. Terry throws a penny down the well at 3.00 m/s and Sam throws a penny up in the air at the same speed. If they threw them at the same time, how much time would there be between splashes?

*Monday, September 19, 2016 by Fred*

**Physics**

Joseph drives his car 10 km [E20 °S] then 25 km[N]. What is his total displacement?

*Monday, September 19, 2016 by Kinematics*