Monday

August 29, 2016
Number of results: 39,511

**Physics**

A 275 kg motor cycle and rider accelerate from restand reach a velocity of 20m.s-1 West.the motor cycle wheels exert an average force of 710N East on the road. Calculate the minimum time taken to reach a velocity of 20m.s-1
*January 24, 2016 by Anonymous*

**Physics**

A lead ball is dropped into a lake from a diving board 5.42 m above the water. It hits the water with a certain velocity and then sinks to the bottom with this same constant velocity. It reaches the bottom 4.98 s after it is dropped. (Assume the positive direction is upward...
*September 7, 2009 by Ray*

**physics**

if u have swam one lap in a swimming pool, that means from one end to the other and back. In 3.5 h, a swimmer makes exactly 60 laps in the pool, that is 40 m long. Determine the distance the swimmer traveled, the total displacement of the swimmer, the swimmer's average ...
*January 14, 2014 by Bre *

**physics **

You jog at 9.5 km/h for 7.0km , then you jump into a car and drive an additional 16km . With what average speed must you drive your car if your average speed for the entire 23km is to be 22 km/h? Work: i tried setting up a proportion and setting it to each other using the ...
*August 12, 2014 by Zara*

**Physics**

A race car moves such that its position fits the relationship x = (5.0 m/s)t + (0.75 m/s3)t3 where x is measured in meters and t in seconds. (a) Plot a graph of the car s position versus time. (b) Determine the instantaneous velocity of the car at t = 4.0 s, using time ...
*August 8, 2009 by annemarie*

**physics**

A race car moves such that its position fits the relationship x = (5.0 m/s)t + (0.75 m/s3)t3 where x is measured in meters and t in seconds. (a) Plot a graph of the car s position versus time. (b) Determine the instantaneous velocity of the car at t = 4.0 s, using time ...
*August 8, 2009 by annemarie*

**Calculus**

If a ball is thrown vertically upward from the roof of 32 foot building with a velocity of 112 ft/sec, its height after t seconds is s(t)=32+112t–16t2 . What is the maximum height the ball reaches?What is the velocity of the ball when it hits the ground (height 0 )?
*April 20, 2010 by Jery*

**Physics**

A rock is dropped of the side of a bridge and hits the water below 4s later. a. What was the rock’s velocity when it hit the water? b. What was the rock’s average velocity as it fell? c. What is the height of the bridge above the water?
*April 6, 2010 by Jackie*

**physics**

Mary walked north from her home to Sheila's home, which is 4.0 kilometers away. Then she turned right and walked another 3.0 kilometers to the supermarket, which is 5.0 kilometers from her own home. She walked the total distance in 1.5 hours. What were her average speed and ...
*January 27, 2012 by Nakiya*

**Physics**

"A jogger runs with a velocity of 6.0 km/h [25° N of W] for 35 min and then changes direction, jogging for 20 min at 4.5 km/h [65° E of N]. Using a vector diagram, determine the jogger's total displacement and his average velocity for the workout." I know the answer, what I ...
*February 13, 2013 by Pravda*

**Calculus**

Using the equation x(t)= t^3 - 12t + 1, find the displacement during the first 3 seconds. And then find the velocity during the first 3 seconds. See, I know how to find velocity, but there's a question after that that says to find velocity when t=3...so how do you find it ...
*May 8, 2013 by Millie*

**Physics**

In an experiment, a shearwater (a seabird) was taken from its nest, flown 4760 km away, and released. It found its way back to its nest 14.9 days after it was released. If we place the origin at the nest and extend the +x axis to the release point, what was the bird's average ...
*September 4, 2011 by Adnane*

**calculus**

A Particle moves along the x-axis so that at any time t>0, its acceleration is given by a(t)= ln(1+2^t). If the velocity of the particle is 2 at time t=1, then the velocity of the particle at time t=2 is? The correct answer is 3.346, but how?
*March 11, 2008 by D-MO*

**Physics**

A player strikes a hockey puck giving it a velocity of 47.673 m/s. The puck slides across the ice for 0.175 s after which time its velocity is 46.473 m/s. The acceleration of gravity is 9.8 m/s2 . If the puck strikes the goalie’s pads and stops in a distance of 4.39 cm, what ...
*January 8, 2011 by Chris*

**calculus**

a company introduces a new product for which the number of units sold S is S(t)=200(5-(9/2+t)) where t is the time in months. a.)find the average value of S(t) during the first year. b.) during what month does S'(t) equal the average value during the first year?
*November 15, 2010 by kel*

**Physics**

These are “plug-in-the-number” tasks to familiarize you with the main formulas that link the physics concepts of this chapter. They are one-step substitutions, much less challenging than the Think and Solve problems that follow. Average speed ! total distance covered travel ...
*October 10, 2012 by Katherine*

**Chemistry**

A mixture of O2 and SO2 is confined in a vessel at equilibrium. Which statement describes the conditions that are true for the mixture? I. The mass of SO2 is greater II. The average molecular velocity of the O2 is greater III. The average kinetic energy of the O2 is greater ...
*September 21, 2012 by Helen*

**math**

How can i find the average Velocity and speed for a position time graph*
*February 9, 2010 by jake*

**physics**

what is the average velocity of a vehicle that uniformly accelerates from rest to 38 fps?
*September 27, 2011 by lou*

**Physica**

A box is pulled horizontally by a 60 N force at an average velocity 1.0m/s. The power is
*July 11, 2012 by Q15*

**physics**

A rolling ball moves from x1 = 3.2 cm to x2 = -4.2 cm during the time from t1 = 3.8 s to t2 = 6.1 s. What is its average velocity?
*August 23, 2012 by david*

**physics**

A car goes 10 km in 5 minutes when its average velocity is 80 km/hr. true or false
*August 26, 2012 by jassi*

**physics**

what is the particle's average velocity in the y direction vy between t=0.200s and t=0.300s?
*October 17, 2012 by ramona*

**Physics **

Your velocity changes from 50 m/s to the left to 10 m/a to the right in 15s, what is your average acceleration?
*September 22, 2013 by Katlin *

**Please help :(!!**

Your velocity changes from 50 m/s to the left to 10 m/a to the right in 15s, what is your average acceleration?
*September 22, 2013 by Ash*

**phisecs**

A car travels in a stright line at 43 km/h for 1 h and at 65 km/h for 5 h. Find the average velocity in km/h?
*February 19, 2014 by neon *

**Physics (Kinematics Check)**

What is the average velocity of a dropped brick that falls 4.0 m? vi = 4.0 m/s vf = 0 m/s a = 9.81 m/s^2 t = vf-vi / a t = -4/9.81 t = 0.41 s v = d/t v = 4.0/0.41 v = 9.81 m/s^2 <----------
*July 8, 2015 by Lucina*

**Physics**

What would be the average velocity of an object falling 1.25m from the rest?
*January 25, 2016 by JuliePham*

**physic**

a car travels east at 89 km/h for 1 hour.it then travels 26 east of north at 141 km/h for another 1 hour. a)what is the average speed for the trip? b)what is the average velocity for the trip?
*September 8, 2014 by siti*

**Physics**

An athlete springs a circular 400.0 m track in 50.0 s. Asume he runs a constant speed. a. What is his speed over the entire course? b. What is the magnitude of his instantaneous velocity at any point along the circuit? c. If he starts facing west and runs counterclockwise, ...
*September 17, 2012 by Alex*

**Calculus**

Find the average value of sqrt(cosx)on the interval [-1,1]
*October 21, 2007 by Anonymous*

**calculus**

Find the average value of the function on the given interval f(x) = 2x^3(1+x^2)^4, [0,2]
*January 31, 2009 by bob*

**Calculus**

Find the average value of the function on the given interval: f(x) = e^x/5, [0,5]
*September 3, 2009 by Stacy*

**Calculus**

Prove that the average of LRAM and RRAM is equal to TAM.
*January 24, 2010 by Daniel*

**pre-calculus**

Which of these has the greatest average rate of change between 2 and 3 : f(x)=x ;g(x)=X^2 ;h(x)=x^3?
*January 5, 2011 by Jenny*

**calculus**

What is the average rate of change of y=4x^3 over the interval P(1, 4) and Q(5, 500)?
*January 26, 2011 by evan*

**calculus**

determine the average value of f(x) over the interval from x=a to x=b, where f(x)=100e^-.5x; a=0, b=4
*December 15, 2012 by chola*

**Fundamental Theorm of Calculus**

Find the average value of f(x)=3x^2-2 x on the interval [3,6]
*November 20, 2013 by LIz*

**Fundamental Theorm of Calculus**

Find the average value of f(x)=7x^{-2} on the interval [1,5]
*November 20, 2013 by Chrissy*

**Calculus**

The motion of a spring that is subject to dampening (such as a car's shock absorber)is often modeled by the product of an exponential function and a sine or cosine function. Suppose the equation of motion for a point on such a spring is s(t)=3∗e^(−2t)sin(3ðt) where...
*June 18, 2013 by Robin*

**Integral calculus**

A particle is put inside an accelerator at time t=0. After t sec, its velocity is 10^5t^2 m/s. How far does the particle move during the first 10**-2 sec? distance= int velocity dt = INT 1E5 t^2 dt limits 0 to 1E-2 sec
*April 13, 2007 by Febby*

**CALCULUS**

if a ball is thrown vertically upward with a velocity of 80m/s then its height after t seconds is s=80t-16t^2 a) what is the maximum height reached by the ball? b)what is the velocity of the ball when it is 96 ft above the ground on its way up? on its way down?
*October 28, 2007 by matttt*

**calculus**

a revolving light is located at 5 km from a straight shoreline with a constant angular velocity. what velocity does the light revolve if the light moves along the shoreline at the rate of 15km/min when the beam of light makes a angle of 60 with the shoreline?
*September 3, 2014 by dinesh*

**physics**

. A race car moves such that its position fits the relationship x = (5.0 m/s)t + (0.75 m/s3)t3 where x is measured in meters and in t in seconds. (a) Plot a graph of the car’s position versus time. (b) Determine the instantaneous velocity of the car at t= 4.0 s, using time ...
*September 24, 2012 by shiranee*

**physics**

need help with this physics questions a jogger runs with a velocity of 6km/h 25 degrees north west for 35 minutes and then changes direction , jogging for 20 minutes at 4.5km/h 65 degrees east of north. using a vector diagram determine the joggers total displacement and his ...
*March 1, 2010 by jake*

**Business Calculus**

A company has operating costs of $2000 per thousand items produced. Its revenue function can be modeled by the equation: R(x)=30x/(x+2)² , where x is measured in thousands of items produced, and C and R are measured in thousands of dollars (so C(x)=2). 1. Determine the price-...
*March 25, 2011 by Adriana*

**Math**

The location of an object on the x-axis at time t seconds is given by x(t)= a + mt, where a, m are constants. (a) Where is the object located at time t=1? x(1)= a+m(1) = a+m (b) What is the average velocity of the object between 1 and 2 seconds? x(2)-x(1)/(2-1) a+2m-(a+m)=m (c...
*January 18, 2010 by SC*

**physics**

Motion in a Circle A particle P travels with constant speed in a circle of radius 5.6 m and completes one revolution in 36.0 s. The particle passes through O at t = 0 s. What is the magnitude of the average velocity during the interval from t = 3.6 s and t = 12.5 s. What is ...
*September 18, 2009 by AK*

**physics**

A 1.5-kg playground ball is moving with a velocity of 3.0 m/s directed 30 ° below thehorizontal just before it strikes a horizontal surface. The ball leaves this surface 0.50 slater with a velocity of 2.0 m/s directed 60 ° above the horizontal. What is themagnitude of the ...
*August 12, 2012 by Ben*

**calculus**

A person is jumping straight up and down on a trampoline. The height of the center of mass of the person is measured every tenth of a second. It takes just over one second to complete one full bounce. (If you want to see the data, look at the video above.) t (seconds) 2.90 3....
*August 12, 2015 by JuanPro*

**english**

1. He is of average height. 2. He is around average height. 3. He is a little below average height. 4. He is over average height. 5. He is of much more average height. 6. he is a little average in height. 7. He is more average in height. (Are they all grammatical?)
*November 14, 2012 by rfvv*

**Physics Help!!!!**

A runner in a relay race runs 20m north, turns around and runs south for 30 m, then turns north again and runs 40m. the entire run took 30 seconds. what was the average speed of the runner? what was the average velocity of the runner?
*August 30, 2014 by Kim*

**ENG102**

Question 1. A car moves 26 km due east then 14 km due north. It then turns along a path running north-east with 15 km, then 17 km due west. If the time for the entire journey is 2 hrs, Find; (a) the car’s average speed in m/s (b) the car’s average velocity in km/h
*May 1, 2012 by DESMOND*

**University of Ghana**

• A car moves 26 km due east then 14 km due north. It then turns along a path running north-west with 15 km, then 17 km due west. If the time for the entire journey is 2 hrs. • Find; • (a) the car’s average speed in m/s • (b) the car’s average velocity in km/h
*March 23, 2013 by Daniel*

**physics**

need help with doing this combining vector question A jogger runs with a velocity of 6km/h 25 degrees north west for 35 minutes and then changes direction , jogging for 20 minutes at 4.5km/h 65 degrees east of north. using a vector diagram determine the joggers total ...
*March 2, 2010 by jake*

**Calculus**

How to integrate with position, velocity and accelleration
*May 10, 2009 by Caitlin*

**calculus**

2 given s(t)=3t +5t+3, find the instantaneous velocity when t i= 5.
*October 18, 2014 by Duane*

**Physics**

A 0.4 kg ball strikes a smooth level floor with a velocity of 5.0 m/s, 60 degrees below the horizontal.Â It rebounds off the floor with an unknown velocity and reaches a maximum rebound height of 0.60 m. If the duration of the collision with the floor is 50 milliseconds, then...
*October 25, 2012 by AH*

**Science**

how do you calculate the average velocity of a quarter dropped from a tower after 10 seconds?
*October 5, 2008 by Layla*

**Physics**

how to find the average velocity and speed for an entire postion time graph
*February 21, 2010 by jake*

**physics**

when a car goes around an 8-km track in 20-minutes. what is the average speed and velocity.
*April 1, 2012 by jim*

**physics**

a horse walks 56 meters in 75 second. what is his average velocity?show the work
*May 3, 2012 by lisa*

**physics**

a truck travels at 90km/hr W for 10 min. then at 110 km/ hr for 38 km what was the trucks average velocity
*January 17, 2013 by Anonymous*

**physics**

on a trip a car covers 42.3 miles in 40.0 minutes. find the average velocity in m/s and km/hr
*June 13, 2014 by roger*

**Physics 11U**

can a initial velocity from the average acceleration formula (Aav=Vf-Vf/t) be negative?
*September 14, 2014 by hi! help me.*

**Calc**

The wind chill is the temperature, in degrees Fahrenheit, a human feels based on the air temperature, in degrees Fahrenheit, and the wind velocity (v), in miles per hour (mph). If the air temperature is 32degrees Fahrenheit, then the wind chill is given by W(v)=55.6-22.1v^.16 ...
*January 23, 2011 by Leannna*

**calculus**

Find the average value of the function f(x)=8x^2-5x+6 , on the interval [3,5]. Find the value of x-coordinate at which the function assumes it's average value. what is the average value = to ? what is the x coordinate = to ? Thanks
*December 3, 2011 by li*

**Calculus**

Find the average value of function f(t)= 4sec(t)tan(t), interval [0,pi/4]
*September 14, 2011 by Zel*

**Math/Calculus**

Find the average rate of change on the interval [-6,3] of the function h(x)=x^2-4x+7. A. -7 B. 7 C. 1 D. 13 E. -5
*September 19, 2011 by Roger*

**Calculus**

What is the average rate of change I would like to know how does the formula f(2.1)-f(2)= 12.3 how did they get that answers
*September 22, 2011 by Shameaka*

**Calculus**

Find the average value of the function on the given interval. f(x)=6x lnx; [1,e^2]
*November 26, 2011 by Jane*

**College Calculus**

Calculate the average over the given interval. f(x)=sin(pi/x)/x^2, [1,2]
*February 9, 2012 by Anonymous*

**Physics**

What is the maximum speed at which a car could be moving and not hit a barrier 35.0 m ahead if the average acceleration during braking is -10.0 m/s2 and it takes the driver 0.90 s before he applies the brakes? subtract from the 35 m the distance during reactiontime (v*.9) so ...
*September 4, 2007 by Sarah*

**physics**

A rocket carrying a satellite is accelerating straight up from the earth's surface. At 1.25 s after liftoff, the rocket clears the top of its launch platform, 69 m above the ground. After an additional 4.80 s , it is 1.00 km above the ground. Calculate the magnitude of the ...
*March 5, 2012 by aisha*

**math-average**

What is SUM AVERAGE? The professor mentioned that the exam average was 58 [out of 100] and sum average was 144
*March 6, 2008 by see*

**physics**

part 1 Simpson drives his car with an average veloc- ity of 47.5 km/h to the east. How long will it take him to drive 137 km on a straight highway? Answer in units of h part 2 How much time would Simpson save by in- creasing his average velocity to 105 km/h to the east? Answer...
*September 6, 2011 by ashley*

**Physics**

1. A stationary curling stone is struck in a glancing collision by a second curling stone of equal mass. If the first stone moves away at a velocity of 0.92 m/s [N71oW] and the second stone moves away at a velocity of 1.25 m/s [N44oE], what was the initial velocity of the ...
*January 18, 2016 by Ryback*

**Calculus**

f(t)= -2te^-t^2, [0,5] Find average value. Attempt: I know that the average value is the integration of f(t) from a to b divided by b-a. I used u substitution to get u= -t^2 and du= -2xdx. I changed the limits of integration to [0,25] and I got integral of e^u du. I am not ...
*October 29, 2009 by Alex*

**physics**

A 0.150 kg particle moves along an x axis according to x(t) = -13.00 + 2.00t + 3.50t2 - 2.50t3, with x in meters and t in seconds. In unit-vector notation, what is the net force acting on the particle at t = 3.45 s? I tried solving using s=Vit + (.5)at^2 but I can't find the ...
*September 22, 2009 by jeff*

**Physics**

A 0.150 kg particle moves along an x axis according to x(t) = -13.00 + 2.00t + 3.50t2 - 2.50t3, with x in meters and t in seconds. In unit-vector notation, what is the net force acting on the particle at t = 3.45 s? I tried solving using s=Vit + (.5)at^2 but I can't find the ...
*September 22, 2009 by richard*

**Physics**

A train accelerates from the rest at the station A at a rate of 0.8 m/s2 for 25 s, the travels at constant velocity for 77.5 s before it comes to rest at the station B after period of retardation lasting 20 s. What is the distance between stations A and B, and the average ...
*April 14, 2015 by Albert*

**Physics**

For no apparent reason, a poodle is running counter-clockwise at a constant speed of 3.00 m/s in a circle with radius 2.9. Let v_1 be the velocity vector at time t_1, and let v_2 be the velocity vector at time t_2. Consider \Delta v = v_2-v_1 and \Delta t = t_2 - t_1. Recall ...
*March 16, 2012 by Krista*

**Calculus study**

A baseball team plays in a stadium that holds 52000 spectators. With the ticket price at $9 the average attendance has been 21000. When the price dropped to $6, the average attendance rose to 26000. a) Find the demand function p(x), where x is the number of the spectators. (...
*March 30, 2015 by Juan *

**Physics**

It has two flags, each exactly 25.4 mm long, with the midpoints of the flags separated by 162 mm. The first flag interrupts the photogate timer for a time 50 ms, and the second flag interrupts the photogate timer for a time 45 ms. 1) What was the average velocity of the glider...
*January 27, 2016 by Anonymous*

**physics**

A tennis ball with a velocity of +9.6 m/s to the right is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a velocity of -5.8 m/s (to the left). If the ball is in contact with the wall for 0.013 s, what is the average ...
*October 6, 2012 by Mackenzie *

**Physics**

A player strikes a hockey puck giving it a velocity of 47.673 m/s. The puck slides across the ice for 0.175 s after which time its velocity is 46.473 m/s. The acceleration of gravity is 9.8 m/s2 . The mass of the puck is 185 g. If the puck strikes the goalie’s pads and stops ...
*January 9, 2011 by Mike*

**physics**

An electron passes location h0.02m, 0.04m,−0.06mi, and 4 μs later is de- tected at location h0.02 m, 1.84 m,−0.86 mi. Find the average velocity of the elecron: ¯v = <vx, vy, vz> If the electron continues to travel at this av- erage velocity, find where ...
*January 19, 2014 by NADIA*

**Physics**

A dog running in an open field has components of velocity vx = 3.0m/s and vy = -1.1m/s at time t1 = 11.7s . For the time interval from t1 = 11.7s to t2 = 22.2s , the average acceleration of the dog has magnitude 0.55m/s2 and direction 34.5∘ measured from the +x−...
*January 22, 2015 by Kelly*

**Physics**

An archer puts a 0.28 kg arrow to the bow string. An average force of 200 N is exerted to draw the sting back 1.1 m. a) Assuming no frictional loss, what speed does the arrow leave the bow? b) If the arrow is shot straight up, how high does it rise? My thoughts: KE = 1/2mv^2. ...
*November 16, 2007 by Einstein*

**Physics (acceleration)**

1. Jasmine rode a horse down a path headed north. she started from rest and then accelerated at 0.5 m/s2 for 12 seconds and then travelled at a constant speed for 28 seconds. a.) what was her velocity after 12 seconds? b.) what was jasmines displacement after 10 seconds? c.) ...
*May 14, 2014 by Samaira*

**Physics**

During a lawnmower race, a rider starts from rest and accelerates at 1 m/s/s for 10 seconds. The rider then maintains a constant velocity for the remainder of the race, which takes an additional 20 seconds. A) How far was the race? B) What was the lawnmower's average velocity ...
*September 25, 2011 by Karla*

**AP Calculus**

A particle is moving around the unit circle (the circle of radius 1 centered at the origin). At the point (.6, .8) the particle has horizontal velocity dx/dt=3. what is its vertical velocity dy/dt at that point? a)-3.875 b0-3.75 c)-2.25 d03.75 e)3.875
*December 15, 2010 by Jeff*

**Physics**

A runner completes an 850m race with two laps of the 425m track in the x-y plane centered at the origin in 1 mins, 50.6s . A runner rounds the track counterclockwise starting at the point (67.6 , 0). Find the runner's average velocity for the race. Find the runner's average ...
*February 8, 2012 by Tig*

**PHYSICS**

A race car's velocity increases from 3.6 m/s to 32.4 m/s over a 5-s time interval. What is its average acceleration?
*March 2, 2010 by Amanda *

**Science**

How can you tell the similarity between displacement and average velocity? I really do not know. Please help, and I will appreciate it. :)
*February 27, 2014 by Brady*

**Physics**

A person is travelling 6 km (E) then 4 km (N) and finally 2 km (W). Calculate the average speed And velocity. Show your work
*March 4, 2014 by Mika *

**physics**

A car traveled 1000 kilometers from krui to Jakarta in 15 hours. What was its average velocity?
*December 25, 2015 by daim*

**math**

an airplane travels 750 miles in 1 hour and 45 minutes. what is the average velocity of the plane?
*April 13, 2016 by ricky*

**math**

A bicycle trip starts at 2:00 p.m. and ends at 5:45 p.m. If the cyclist travelled 86.3 miles, what was his/her average velocity?
*April 28, 2016 by qwenie*

**Physics**

1)A car is moving with uniform accelaration. It moves along two point A and B and enters with velocity 50 m/s and 80 m/s respectively . Find the velocity when the car is moving in b/w the point A and B. Let t be the time measured from when the velocity is 50 m/s V = 50 + a t ...
*August 24, 2011 by Prathiksha *