Sunday

September 25, 2016
Number of results: 14,651

**Physics/Formulas**

Calculate the SI units of the constants A and B in each of the following equations. Assume that the distance x is in meters (m), the time t is in seconds (s), and the velocity v is in meters per second (m/s). a. x = A + B.t Meters = A + B * seconds b. x = ¼ A.t2 Meters = 0.25...

*August 21, 2013 by Paul*

**ENGLISH**

1. "Imagine a wolf moving through the northern woods. The movement, over a trail he has traversed many times before, is distinctive, unlike that of a cougar or a bear, yet he appears, if you are watching, sometimes catlike or bearlike. It is purposeful, deliberate movement. ...

*October 26, 2015 by Kaai97*

**physics**

A projectile is fired from the origin (at y = 0 m) as shown in the diagram. The initial velocity components are V0x = 310 m/s and V0y = 26 m/s. The projectile reaches maximum height at point P, then it falls and strikes the ground at point Q, which is 20 m below the launch ...

*February 21, 2013 by Anonymous*

**Physics**

a ship is headed towards east at a thrust speed of 7.00 knots. A strong wind pressure causes the ship to deviate to the north at 1.00 knots. The sea current is flowing to the southwest at 4.00 knots. Determine the velocity of the ship relative to the earth's surface.

*September 8, 2016 by Julie*

**Simple algebra/Physics problem**

A proton, moving with a velocity of vi, collides elastically with another proton that is initially at rest. Assuming that after the collision the speed of the initially moving proton is 2.90 times the speed of the proton initially at rest, find the following. (a) the speed of ...

*November 8, 2015 by PersonWhoNeedsHelp*

**physics**

there is no air resistance. using a cannonball launcher, how can i find how far the cannonball will go (horizontally) if launched at 30 degrees? heres what i know: -the vertical displacement is -.245m -the vertical acceleration is -9.81m/s^2 -at 0 degrees, the initial velocity...

*September 8, 2009 by jawn*

**calc-kinematics**

if a particle moves along a line so that at time t where t [0,pi] its position is given by s(t)=-4cost-t^2/2+10 what is the velocity of the particle when its acceleration is zero? so i found v(t) = 4sint-t a(t)=4cost-1 = 0 solved for t plugged it into v(t) and i got the wrong ...

*March 30, 2010 by James*

**Physics**

A boxer punches a 50 Kg bag. Just as his fist hits the bag, it travels at a speed of 7 m/s. As a result of hitting the bag, his hand comes to a complete stop. Assuming that the moving part of his hand weigh 5 Kg, calculate the rebound velocity and kinetic energy of the bag.

*June 28, 2010 by physics*

**college physics**

A CD has to rotate under the readout-laser with a constant linear velocity of 1.25 m/s. If the laser is at a position 3.2 cm from the center of the disk, what are the revolutions per minute (rpms) of the disk? Can someone please help me solve this problem step by step. The ...

*September 20, 2010 by Amber*

**Engineering Kinematic**

The particle travels along the path defined by the parabola y=0.5(x^2). If the component of velocity along the x-axis is v=5t [m/s], determine the particle's distance from the origin and the magnitude of its acceleration when t=1s. The initial condition is t=0, x=0 and y=0. ...

*October 16, 2010 by Claire*

**Physics **

How would I calculate the speed of a block before it leaves an incline if I have: the height of the incline, h=0.60m the height of the table its on H=0.952m and the distance traveled on the track d= 1.18m ? I have the acceleration calculated as 4.9 which is correct but I don't...

*September 28, 2011 by Lauren*

**Physics**

15. [1pt] A thin hoop of radius r = 0.59 m and mass M = 9.2 kg rolls without slipping across a horizontal floor with a velocity v = 3.3 m/s. It then rolls up an incline with an angle of inclination θ = 31°. What is the maximum height h reached by the hoop before rolling ...

*November 5, 2011 by Morgan*

**physics**

the first active volcano observed outside the earth was discovered in 1979 on Io, one of the moons of jupiter. the volcano was observed to be ejecting material to a height of about 2.00x10^5m. given that the acceleration of gravity on Io is 1.80 m/s^2, find the initial ...

*November 22, 2011 by taylor*

**Physics**

A 1500 kg car traveling at 17.6 m/s to the south collides with a 5000 kg truck that is initially at rest at a stoplight. The car and truck stick together and move together after the collision. What is the ﬁnal velocity of the two-vehicle mass? Answer in units of m/s

*January 22, 2012 by Angel*

**Phizzics....**

A 0.250 kg ball is thrown straight upward with an initial velocity of 38 m/s. If air friction is ignored, calculate the: (a) height of the ball when its speed is 12 m/s (b) height to which the ball rises before falling (c) How would your answers to (a) and (b) change if you ...

*May 10, 2012 by blue ivy*

**Physics**

Two children are playing on a 154-m-tall bridge. One child drops a rock (initial velocity zero) at t = 0. The other waits 1.1 s and then throws a rock downward with an initial speed v0. If the two rocks hit the ground at the same time, what is v0

*June 20, 2012 by Sierra*

**Physics**

cart A with mass: 512g (0.512kg) is on a horizontal table. the cart is connected to cart b with mass: 51.0g (0.051kg) through a string that is crossing a pulley. cart A is released from rest at 60 cm(0.60m), it passes a photogate with a velocity of 0.90m/s. What is the work ...

*December 20, 2012 by Help*

**Algebra**

An object is launched upward from the ground with an initial vertical velocity of 40 feet per second. After how many seconds does the object reach a height of 25 feet? I need to use the vertical motion model. Here is my work so far. h = -17t^2 + 40t + 25

*April 18, 2013 by Amy*

**algebra**

The ball is kicked straight up in the air from 4' off the ground Original velocity is 60' per second How many secs does it take to hit the ground. Do I use complete the square, square root property, quadratic formula, factoring? formula is h= 16tsquared + 60t +4

*May 22, 2013 by barb*

**Physics**

1. A train traveling at a speed of 110km/h decelerates for 20 seconds. During that time it travels 450 meters. A) What is the acceleration? = m/s^2 B) What is its speed after deceleration? = km/h Initial velocity (u) = 110km/h Time (t) = 20s Distance = 450m Using this formula ...

*June 7, 2013 by Danny*

**physics**

A baseball player slams a fastball towards left field. The ball is hit 1.00 m above the plate at an initial velocity of 3.0 m/s at a 30 degree angle above the horizontal. The left field wall is 113 m away and is 3.00 m high. Is this a home run shot or not?.

*September 26, 2013 by Ashley*

**physics**

A baseball player slams a fastball towards left field. The ball is hit 1.00 m above the plate at an initial velocity of 36.0 m/s at a 30 degree angle above the horizontal. The left field wall is 113 m away and is 3.00 m high. Is this a home run shot or not?.

*September 26, 2013 by Ashley*

**physics**

A test rocket is launched vertically from ground level (y = 0 m), at time t = 0.0 s. The rocket engine provides constant upward acceleration during the burn phase. At the instant of engine burnout, the rocket has risen to 49 m and acquired a velocity of What is the maximum ...

*September 26, 2013 by D*

**College Physics **

A velocity selector consists of electric and magnetic fields described by the expressions vector E = E k hat bold and vector B = B j hat bold, with B = 0.0140 T. Find the value of E such that a 670 -eV electron moving along the negative x axis is undeflected. kV/m

*October 25, 2013 by Suhani*

**physics**

A baseball of mass m1 = 0.32 kg is thrown at a concrete block m2 = 6.25 kg. The block has a coefficient of static friction of μs = 0.71 between it and the floor. The ball is in contact with the block for t = 0.195 s while it collides elastically. What is the minimum ...

*March 26, 2014 by Anonymous*

**Physics**

Carlo drives his car for a picnic by first going 105 km north to pick up his girlfriend and then 120.0 km east to reach the picnic groove. The whole trip takes 135 min. Calculate (a) Carlo’s average speed and (b) average velocity.

*June 17, 2014 by Piper*

**science**

Plane sound wave of frequency 500 Hz fall normally on a smooth wall.At what distance from the wall will the air particles have maximum and minimum amplitude of vibration and the velocity of sound in air may be taken as 340 meter per second.

*July 13, 2014 by Samundra*

**physics**

A motorist A leaves a small town and drives East at 28 ms-1 . A second motorist B is driving South towards the same town at 23 ms-1 . Draw a diagram and find the velocity of motorist B relative to motorist A? ( VB REL A ) is this just phythagoras and finding the resultant ...

*August 22, 2014 by jp*

**Physics**

Two children are playing on a 147-m-tall bridge. One child drops a rock (initial velocity zero) at t = 0. The other waits 1.2 s and then throws a rock downward with an initial speed v0. If the two rocks hit the ground at the same time, what is v0?

*September 23, 2014 by Chrissy*

**physics**

A person is pulled to the right on a sled (total mass of 60.1 kg) across the surface of a frozen pond with a force of 62.9 Newtons so that they move with a constant velocity. What is the force of friction acting on the sled? Choose your coordinate system so that upward, and to...

*October 27, 2014 by Anonymous*

**Physics**

A 24.5-kg child is standing on the outer edge of a merry-go-round which has moment of inertia 989 kg • m2 and radius 2.40 m. The entire system is initially rotating at 0.180 rev/s. Find the angular velocity if the child moves to a final position 1.10 m from the center of the ...

*March 8, 2015 by Anonymous*

**physics**

A bird watcher meanders through the woods, walking 0.544 km due east, 0.925 km due south, and 3.58 km in a direction 17.3 ° north of west. The time required for this trip is 1.957 h. Determine the magnitudes of the bird watcher's (a) displacement and (b) average velocity.

*August 12, 2015 by bill*

**physics**

A bird watcher meanders through the woods, walking 0.744 km due east, 0.925 km due south, and 3.97 km in a direction 18.3 ° north of west. The time required for this trip is 1.765 h. Determine the magnitudes of the bird watcher's (a) displacement and (b) average velocity.

*August 14, 2015 by bill*

**Word problems**

Jennifer serves the volleyball to Debra with an upward velocity of 10.5ft/s. The ball is 5 feet above the ground when she strikes it. How long does Debra have to react, before the volleyball hits the ground? Round your answer to two decimal places.

*October 6, 2015 by Jim*

**Physics**

a ball is tossed from an upper story window of a building given an initial velocity of 8m/s at an angle of 20 below the horizontal.it strikes the ground 2seconds later. how far horizontaly from the base of the building does it strike the ground? find the height from which the ...

*November 1, 2015 by Manu*

**Physics I (Classical)**

At some instant, a particle traveling in a horizontal circular path of radius 7.50 m has a total acceleration with a magnitude of 16.0 m/s^2 and a constant tangential acceleration of 12.0 m/s^2. Determine the speed of the particle at this instant and (1/8) revolution later. I...

*June 5, 2016 by Victoria*

**Physics **

A robot probe drops a camera off of the rim of a 239 m high cliff on Mars, where the free-fall acceleration is -3.7 m/s^2. A. Find the time required for the camera to reach the ground. B. Find the velocity with which it hits the ground.( shown work will be appreciated)

*August 21, 2016 by Maggie*

**Physics**

A rocket accelerates upward at 3m/sec2 for 60 seconds when it releases a booster. How long will it take the booster to reach the ground from the highest point and what is its velocity as it is striking the ground? I'm unsure how to find the time if time is already given. I was...

*September 19, 2016 by john*

**Physics**

For its size, the common flea is one of the most accomplished jumpers in the animal world. A 2.1 mm-long, 0.46 mg critter can reach a height of 17 cm in a single leap. A) Neglecting air drag, what is the takeoff speed of such a flea? I don't understand how I can find the ...

*November 24, 2010 by Roxanne*

**Math And Physics**

Law of Gravitation- Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-2 Please answer the question fully ...

*May 1, 2011 by Dwayne*

**Math BOBPURSLEY HELP HELP HELP HELP**

Law of Gravitation- Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-2 Please answer the question fully ...

*May 2, 2011 by Dwayne*

**Physics**

One of the fastest recorded pitches in major-league baseball, thrown by Nolan Ryan in 1974, was clocked at 96.8 mi/h. The acceleration of gravity is 32 ft/s^. If a pitch were thrown horizontally witha velocity of 96.8 mi/h, how far would the ball fall vertically by the time it...

*October 12, 2015 by Luma*

**Physics**

A model rocket is launced from the ground with an initial velocity of 65 m/s directly upwards. If a horizontal wind is blowing at 5 m/s during the flight, how far from the launch point will the rocket land? I know I should probably be using the equation x=x0+v0t+1/2at^2, but i...

*May 12, 2016 by Jessica*

**Math**

Please help ! 1.)a catapult launches a boulder with an upward velocity of 122 feet per second. the height of the boulder, h, in feet after t seconds is givin by the function h(t)=-16t^2+122t+10. what is the boulders maximum height ? and how long does it take the boulder to ...

*April 11, 2016 by Hannah*

**Physics! another one i need help with**

the velocity of the wind would be: (42km/h)cos(30)=36.37 After flying for 15 min in a wind blowing 42 km/h at an angle of 30° south of east, an airplane pilot is over a town that is 50 km due north of the starting point. What is the speed of the airplane relative to the air in...

*February 3, 2007 by Troyyyy*

**physics**

An 8.0 kg puck floating on an air table is travelling east at 15 cm/s. Coming the other way at 25 cm/s is a 2.0 kg puck on which is affixed a wad of bubble gum. The two slam head-on into each other and stick together. Find their velocity after the impact. How much kinetic ...

*May 27, 2012 by myra*

**physics**

Hello everyone, I need help solving this question: Spiderman is running along the rooftops jumping from building to building. The distance between 2 buildings is 20m. What trajectory would be most efficient for him to jump at? At that angle,what must his minimum velocity be to...

*September 4, 2012 by Leo*

**two dimensional kinematics**

A jetliner with an airspeed of 1000 kmlhr sets out on a 1500 km flight due south. To maintain a southward direction, however, the plane must be pointed fifteen degrees west of south. Ifthe flight takes 1 00 min, what is the wind velocity?

*October 8, 2012 by ringo*

**Physics**

1.) Let's say that an an orange is launched upward at 22m/s. What is the displacement 3.5s later? 2.) When a volcano erupts, big rocks have been measured to reach heights of 50km (50,000m) What would the initial velocity need to be in order to reach such heights (neglect air ...

*October 15, 2014 by Andrew*

**Physics**

A block and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distance of 400M at a steady rate.if the effort is equal to 60N,determine (a)distance moved by the effort (b)work done by lifting the load(c)the loss in energy involved in ...

*February 4, 2015 by Wisdom*

**calculus**

A girls throws a tennis ball straight into the air with a velocity of 64 feet/sec. If acceleration due to gravity is −32 ft/sec2, how many seconds after it leaves the girl's hand will it take the ball to reach its highest point? Assume the position at time t = 0 is 0 feet.

*June 15, 2015 by Anonymous*

**Calculus 1**

A particle moves along a straight line with equation of motion s = f(t), where s is measured in meters and t in seconds. Find the velocity and speed when t = 5. (Round your answers to two decimal places.) f(t) = t^−1 − t *We havent learned derivative yet but we ...

*September 12, 2015 by TayB*

**Physics**

Figure Ex5.7 shows the velocity graph of a 5.0 kg box as it pushed to the right (->) along a horizontal surface. Assume that a 12 newton friction force acts on the box to the left (<-) during its the entire motion. What is the amount of right-ward (->) acting push on ...

*October 3, 2015 by ames*

**physics**

A particle moving in simple harmonic motion passes through the equilibrium point x=0, 3 times per second. At t=0 its velocity at x=−0.0325m is negative. It travels 0.5m in a complete cycle. a) what is the phase constant in cm. i found the equation: x(t)=12.5sin(3pi t +x...

*January 31, 2016 by maryam*

**physics .Henry,Damon,Steve,Saed,bobpursley, And This is my question every one**

A ball is thrown straight up by a passenger in a train that is moving what a constant velocity. Where would the ball land —back in his hands, in front of him, or behind him? Does your answer change if the train is accelerating in the forward direction? if yes, how?

*August 21, 2016 by himel*

**Physics**

Physics teacher has this question for hw. 38. An electric powered model car starts from rest and moves in a straight-line for 4.0 s. The relationship between time and position is x^2+ 2 t^2 = 32, t in seconds and x in cm. Find the velocity at t= 1 s & t = 3 s. he gave us the ...

*September 17, 2016 by Eric*

**Physics**

A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. The helium nucleus is observed to rebound at an angle '2 = 41° from the neutron's initial direction. The neutron's initial speed is 5.6 105 m/s. Determine the...

*May 30, 2007 by micole*

**Physics**

I know how to get the speed if it accelerated the whole time. How do I calculate the cruising speed? Starting from rest, a car travels 1,350 meters in 1 min. It accelerated at 1 m/s^2 until it reached its cruising speed. Then it drove the remaining distance at constant ...

*September 7, 2007 by Colin*

**physics**

The static pressure in a horizontal pipeline is 4.3 x 10^4 Pa, the total pressure is 4.7 x 10^4 Pa, and the area of cross-section is 20cm^2. The fluid may be considered to be incompressible and non-viscous and has a density of 10^3 kg/m^3. Calculate (i) the flow velocity in ...

*March 26, 2010 by Edwin*

**physics**

a bullet of mass of 12 grams is fired into a large block of mass 1.5 kg suspended from light vertical wires. the bullet imbeds in the block and the whole system rises 10 cm. find the velocity of the bullet just before the collision.

*June 28, 2010 by erin*

**Calculus**

The velocity of a car (in miles per hour) is given by v(t) = 61.25t − 17.5 t^2 where t is in hours. Write a definite integral for the distance the car travels during the first 2.5 hours. Use your graphing calculator to find this distance. Distance =

*November 14, 2010 by Jane*

**Physics**

Two brothers are jogging, Josh and Drake. Josh has 1/2 the KE of Drake. Also, he is twice the mass of Drake. Plus, Josh had to increase his speed by 1.35 meters/second to achieve the same kinetic energy of Drake. What is the initial velocity?

*December 18, 2010 by Bob*

**Physics Honors**

A pool ball leaves a 0.60 meter high table with an initial velocity of 2.4 m/s. Predict the time required for the pool ball to fall to the ground and the horizontal distance between the table's edge and the ball's landing location.

*October 23, 2011 by Allison*

**Physics**

A rocket, 8975 kg, traveling at 1255 m/s East explodes into two pieces. if one piece, 2450 kg, moves at 750.0 m/s due south, what is: the mass of the second piece? the momentum of the second piece? the velocity of the second piece?

*October 27, 2011 by Jessica*

**Mechanics AQA igher**

A ship is being steered due east. A current is flowing from north to south, so that the actual velocity of the ship is 12 km/h on a bearing of 120 degree . Find the speed of the current and still water speed of the ship

*February 1, 2012 by Jat*

**physics**

Three carts of masses 5 kg, 12 kg, and 3 kg move on a frictionless horizontal track with speeds of 5 m/s, 8 m/s, and 4 m/s, as shown in ﬁgure. The carts stick together after colliding. 5 kg 12 kg 3 kg 5 m/s 8 m/s 4 m/s Find the ﬁnal velocity of the three carts. ...

*February 1, 2012 by ntirandekura*

**Physics**

A 4.0 x 101 kg wind sled is gliding East across a frozen lake at a constant speed of 12 m/s, when a gust of wind from the southwest exerts a constant force of 1.0 x 102 N on its sails for 3.0 s. With what velocity will the sled be moving after the wind has subsided?

*July 15, 2012 by bob*

**Science**

A 4.0 x 101 kg wind sled is gliding East across a frozen lake at a constant speed of 12 m/s, when a gust of wind from the southwest exerts a constant force of 1.0 x 102 N on its sails for 3.0 s. With what velocity will the sled be moving after the wind has subsided?

*July 15, 2012 by Jack Hill*

**physics**

during a water show the dolphin made a vertical jump of 2.5 m. Determine: a. The initial velocity they need to make that jump. b. the time it takes the dolphin to reach the maximum height. The total time the dolphin remains in the air.

*October 7, 2012 by daniela*

**Physics 1**

A crate of mass 48 kg is pushed up a frictionless ramp by a person as shown in the figure below. Calculate the work done by the person in pushing the crate a distance of 11 m as measured along the ramp. Assume the crate moves at constant velocity. _____J

*October 8, 2012 by John *

**Physics**

The solid fuel of a 300.kg rocket travelling at 1.64x104 km/h is ignited to correct the rocket trajectory in mid-flight to Mars. 10.00 kg of fuel is burnt in 15.00 s. If the exhaust velocity of the fuel, relative to the rocket, is 2.90x103 km/h, what is the acceleration of the...

*October 26, 2012 by Jeff*

**physics**

From the surface of a cylindrical wire of radius R=1 cm carrying a current I=1 mA an electron escapes with velocity v0=30 m/s perpendicular to the surface of the wire. What will be the electron's maximum distance in meters from the axis of the wire? Details and assumptions &#...

*September 20, 2013 by Gk*

**physics**

From the surface of a cylindrical wire of radius R=1 cm carrying a current I=1 mA an electron escapes with velocity v0=30 m/s perpendicular to the surface of the wire. What will be the electron's maximum distance in meters from the axis of the wire? Details and assumptions &#...

*September 20, 2013 by Gk*

**phys223**

What is the amplitude of the motion? Remember, at t = 0 a block with mass M = 5 kg moves with a velocity v = 2 m/s at position xo = -.33 m from the equilibrium position of the spring. The block is attached to a massless spring of spring constant k = 61.2 N/m and slides on a ...

*September 30, 2013 by eddy*

**Physics**

Problem 1- A dog running in an open field has components of velocity vx = 2.2m/s and vy = -2.5m/s at time t1 = 12 s. For the time interval from t1 = 12 s to t2 = 24 s , the average acceleration of the dog has magnitude 0.55 m/s2 and direction 25.5∘ measured from the +x&#...

*October 24, 2013 by Maryam*

**Physics Help!! I'm so confused!!!**

A fire hose sprays 450 liters of water a minute onto a fire with a velocity of 17.0 m/s. Water has a density of 1 kg/liter. What is the average force acting on the fireman holding the hose due to the water? PLEASE EXPLAIN.

*November 14, 2013 by Samantha *

**physics**

A 96.5 kg ice hockey player hits a 0.150 kg puck, giving the puck a velocity of 45.5 m/s. If both are initially at rest and if the ice is friction less, how far does the player recoil in the time it takes the puck to reach the goal 18.0 m away?

*September 29, 2014 by mathew*

**Physics**

A monkey throws a banana horizontally from the top of a tree. The banana hits the ground 3.03 seconds later and lands d = 30.9 meters from the base of the tree. 1. What was the resultant velocity of the banana as it hit the ground? magnitude = ? m/sec. 2. What is the angle ?° ...

*October 3, 2014 by Mack K*

**physics(urgent answer pls)**

A projectile is launched with 30m/s at an angle of 60degree with d horizontal (a) find d position of the projectile,and d magnitude and direction of its velocity at t=2s (b) find d time when d ball reaches the highest point (c) find d horizontal range

*March 1, 2015 by ben*

**Physics**

A projectile is fired with a velocity u at the entrance A to a horizontal tunnel of length L and height H. Determine the minimum value of u and the corresponding value of the angle θ for which the projectile will reach B at the other end of the tunnel without touching the...

*May 15, 2015 by Emon*

**Physics**

A rock is launched off a table horizontally with a velocity of 10 m/s. If the table is 1.5 m above the floor, how long will it take for the projectile to hit the floor? What distance will the rock land in respect from the edge of the table? 2(1.5)/9.8=t^2. T=.553? What is the ...

*November 4, 2015 by Kate*

**physics**

A projectile is launched from and returns to ground level, as the figure shows. There is no air resistance. The horizontal range of the projectile is measured to be R= 166 m, and the horizontal component of the launch velocity is v0x = 26.0 m/s. Find the vertical component v0y...

*December 16, 2015 by chris*

**Physics**

A 25 g bullet with a muzzle velocity of 300 m/s is fired into a board 4.0 cm thick. For a soft board, the bullet goes through the board and emerges with a speed of 50 m/s. What was the average force exerted on the bullet by the board? Answer= 27344 N Show Work

*March 18, 2016 by Bob*

**Physics **

A 25 g bullet with a muzzle velocity of 300 m/s is fired into a board 4.0 cm thick. For a soft board, the bullet goes through the board and emerges with a speed of 50 m/s. What was the average force exerted on the bullet by the board? Answer= 27344 N Show Work

*March 18, 2016 by Andy*

**physics**

A particle moving in a striaght line with uniform deceleration has a velocity of 40m/s at point P. 20m/s at point Q and finally come at rest at point R where QR is equal to 50m. calculate the distance PQ. ii, time taken for PQ,. iii, time taken for PR.

*March 31, 2016 by Anonymous*

**physics**

A particle moving in a striaght line with uniform deceleration has a velocity of 40m/s at point P. 20m/s at point Q and finally come at rest at point R where QR is equal to 50m. calculate the distance PQ. ii, time taken for PQ,. iii, time taken for PR.

*March 31, 2016 by Anonymous*

**physics**

A particle moving in a striaght line with uniform deceleration has a velocity of 40m/s at point P. 20m/s at point Q and finally come at rest at point R where QR is equal to 50m. calculate the distance PQ. ii, time taken for PQ,. iii, time taken for PR.

*March 31, 2016 by Anonymous*

**physics rewrite**

starting from rest, a ball rolls, down an incline at a constant acceleration of 2meters per second squared what is the velocity of the ball after 8.5 seconds? how far does the ball roll in 10 seconds? any one can help pleasse im stuck show n detail how to find the answer

*January 13, 2008 by ashley*

**Algebra II**

A geyser sends a blast of boiling water high into the air. During the eruption, the height (h) (in feet) of the water (t)seconds after being forced out from the ground could be modeled by h = -16t*t + 70t. My question is how do you find the initial velocity of the boiling water?

*March 12, 2008 by Adam*

**physics**

Tigger likes to play golf. For this particular shot, the distance between the spine and the clubhead (aka the distance of the golfclub + arm) is 1.6 m. When the clubhead hits the ball, it is travelling at 50 m/s. How fast is the body and the club rotating? That is, what is the...

*October 26, 2011 by Tyler *

**grade 11 physics**

A championship golfer uses a nine iron to chip a shot right into the cup. If the golf ball is launched at a velocity of 20 m/s at an angle of 45° above the horizontal, how far away was the golfer from the hole when he hit the ball? What maximum height did the ball reach?

*April 10, 2012 by sayan*

**DYNAMICS**

A particle travels along a straight line with a velocity v=(12-3t^2) m/s, when t is in seconds. When t=1s, the particle is located 10m to the left of the origin. Determine the accelaration when t=4s, the displacement from t=0 to t=10s, and the distance the particle travels ...

*February 17, 2013 by HELP*

**college physics**

a tennis ball is thrown straight up with an initial velocity of 22.5 m/s. it is caught at the same distance above the ground. a). how long does it take to reach its maximum height? b). how high does the ball rise? c). at what speed does it hit the ground? d). what total length...

*April 2, 2013 by confused*

**Physics**

Please help!! I know how to work the problem to find velocities, but this one has me stumped! A 2.0kg block slides along a frictionless surface at 1.0m/s . A second block, sliding at a faster 4.4m/s , collides with the first from behind and sticks to it. The final velocity of ...

*October 18, 2014 by Bonnie*

**Physics**

An electron starts from one plate of a charged closely spaced (vertical) parallel plate arrangement with a velocity of 1.78×104m/s to the right. Its speed on reaching the other plate, 2.25cm away, is 3.63×104m/s . If the plates are square with an edge length of 26.0cm , ...

*June 17, 2015 by Yasamin*

**Physics**

A tortoise can run with a velocity of 10 cm/s and hare can run 20 times as fast. In a race they start at the same time but the hare stops to rest for 2 minutes. The tortoise wins by 20 cm. What was the length of the race

*September 15, 2009 by Misha*

**physics**

A 30-06 caliber hunting rifle fires a bullet of mass 0.0118 kg with a velocity of 505 m/s to the right. The rifle has a mass of 6.15 kg. What is the recoil speed of the rifle as the bullet leaves the rifle? Answer in units of m/s.

*January 5, 2010 by Anonymous*

**Physical science**

A projectile spends 20 seconds in the air. It reaches a peak height of 8 meters. How long does it take to reach it's peak height? The projectile has a range of 80 meters. What is it's horizontal velocity?

*June 21, 2011 by Rosie*

**Physics**

What is the angular momentum of the second hand on a clock if the clock has a length of 25cm, a mass of 20g, and is rotating with constant angular velocity. Treat the second hand as a thin rod.

*June 29, 2011 by Jocelyn *

**Physics**

A physics student wants to build a spring gun that when aimed horizontally will give a 35.0- g ball an initial acceleration of 'g' by releasing a spring that has been compressed 18.0 cm. What is the velocity of the ball as it emerges from the gun?

*December 4, 2012 by Courtney *