Tuesday

May 31, 2016
Number of results: 14,150

**physics**

Assume a canister in a straight tube moves with a constant acceleration of -3 m/s2 and has a velocity of 13.5 m/s at t = 0.00 s. (a) What is its velocity at t = 1.00 s? v = m/s (b) What is its velocity at t = 2.00 s? v = m/s (c) What is its velocity at t = 2.5 s? v = m/s (d) ...
*January 22, 2012 by marybeth*

**Objects IN motion**

Table 2 shows the velocity of an object at different times. Time(s)| Velocity(cm/s east) 0 | 0 5 | 7.8 15 | 24.3 20 | 31.8 35 | 57.3 ___________________________ K they have given me the velocity for 5 s, 15, etc. but I want to know the velocity for the other numbers like 2s ...
*November 30, 2010 by Teya*

**TO BOBPURSLEY**

def of average velocity = t^-1 (x - x0) (average velocity = t^-1(x-x0))t=(avearge velocity)t + x0= x - x0 + x0 = x = (average velocity)t + x0 x = (average velocity)t + x0 def of average velocity were costant acceleration is assumed = 2^-1(v0 + v) plug into x = (average ...
*June 18, 2009 by TO ]BOBPURSLEY*

**Physics**

def of average velocity = t^-1 (x - x0) (average velocity = t^-1(x-x0))t=(avearge velocity)t + x0= x - x0 + x0 = x = (average velocity)t + x0 x = (average velocity)t + x0 def of average velocity were costant acceleration is assumed = 2^-1(v0 + v) plug into x = (average ...
*June 19, 2009 by Physics*

**science**

When is the average velocity of an object equal to the instantaneous velocity? a) always b)never c) only when velocity is constant d)only when velocity is increasing at a constant rate c) would be the answer since you could cross out a). I do know that instantaneous velocity ...
*September 6, 2007 by Tammy*

**Physics**

When is the average velocity of an object equal to the instantaneous velocity? a) always b)never c) only when velocity is constant d)only when velocity is increasing at a constant rate c) would be the answer since you could cross out a). I do know that instantaneous velocity ...
*September 9, 2007 by Tammy*

**physics**

a aircraft is flying to north with velocity of 350 m/s, aside wind of velocity 100m/s is blowing due to west. what is the resultant velocity ? what is the direction of resultant velocity? how far this aircraft travels during 1 hour?
*October 8, 2015 by ne*

**Physics**

The equation describing the velocity of the ice falling from the wing as a function of time is v=45(1-(0.804)^t). Determine algebraically the time required, to the nearest tenth of a second, for the ice to reach a velocity of 98% of its terminal velocity of 45 m/s. (v=velocity...
*June 1, 2009 by Sydney*

**physics**

Which of the following statements is not true? a)the horizontal component of velocity cannot be larger than the total velocity b)the vertical component of velocity cannot be larger than the total velocity c)Neither horizontal nor vertical components of velocity cannot be ...
*October 15, 2007 by Tammy*

**physics**

An electron has a constant acceleration of 2.0 m/s2. At a certain instant its velocity is 10.9 m/s. (a) What was its velocity 2.5 s earlier? m/s (b) What is its velocity 2.5 s later? m/s
*December 6, 2008 by johnny*

**Physical Science**

a car has an acceleration of 4 m/s squared. What will the increase in it's velocity be after 2 seconds? If it started with a velocity of 30 m/s, what is its final velocity?
*February 24, 2011 by Des*

**Math**

Me, again... Please help me. Thank you. Assume a plane is flying directly north at 200 mph, but there is a wind blowing west at 23 mph. Part I: Express both the velocity of the plane and the velocity of the wind as vectors, using proper notation to represent each direction of ...
*January 8, 2014 by Lizzie098*

**Physics**

An oil spill on the ocean is sometimes modeled as having a velocity that has two components: a wind induced velocity that is 3% of the true wind velocity and an independent tidal velocity Vtidal. The tidal velocity is 3.0 km/hr due north and V wind = 40 km/hr 20 degrees north ...
*January 17, 2015 by zaya*

**Physics**

Pluto’s minimum orbital velocity is 3.7 km/s. What are the values for vP (perihelion velocity) and vA (aphelion velocity)?
*November 30, 2010 by Lola*

**physics**

distinguish between Root mean square velocity, Most probable velocity, and Average velocity of gas molecules.
*April 16, 2012 by frank fred*

**Physical Science**

What is the acceleration of an airplane with an initial velocity of 150 m/s and a final velocity of 175 m/s and the velocity change was made in 5 seconds? .
*January 2, 2013 by Mariah *

**Please help with Calculus problem??**

A particle moves with a fixed acceleration 3 m/s^2. If its initial velocity is s(0)=0: a) Find its velocity function. b) How long does it take for the particle to reach the velocity 14 m/s^2? c) Find the distance the particle traveled when its velocity reaches 14 m/s^2.
*July 10, 2013 by Robin*

**Science**

A car runs at a constant velocity of 15m/s for 300sec and then accelerates uniformly to a velocity of 25m/s over a period of 20s. This velocity is mantained for 300s before the car is brought to rest with uniform deceleratiom in 30s. Draw a velocity time graph to represent the...
*March 30, 2016 by Anonymous*

**physics**

A train passes a control tower with a velocity u and has a constant acceleration.At 800m beyond the tower,the velocity is 48km/h;and at 1.6km beyond the tower,the velocity is 64km/h,what is the velocity u ?
*June 19, 2011 by chrystabelle*

**Physics**

A ball is thrown as a projectile with a horizontal velocity of 30 m/s and a vertical velocity of 30 m/s. At the highest point which of the following is true? A) The velocity is zero B) The acceleration is 0 C) The acceleration is 9.8 m/s2 D) The acceleration is -9.8 m/s2 E) ...
*July 8, 2014 by Anonymous*

**Physics - Kinematics**

Need some help with my homework! Question 7 a) Acceleration is the rate of change of velocity Use your definition in (a) to show that v = u + at, where v is the final velocity, u is the initial velocity and a and t are the acceleration and the time interval respectively. State...
*April 17, 2012 by Iman*

**physics emegency!**

A 16 kg object with a velocity 7.5 m/s explodes into two equal fragments. One flies off with a velocity 2.5i -2.5j m/s. What is the velocity of the other fragment in vector notation?
*November 14, 2011 by joe*

**Science**

Maddy hits a golf ball up into the air with an initial velocity of (20m/s, 49m/s). Record the horizontal velocity, & vertical velocity at each second for 10 seconds.
*November 15, 2012 by Anonymous*

**Physics!! help pleasee**

A 10 kg object with a velocity 7.5i m/s explodes into two equal fragments. One flies off with a velocity 2.5i -2.5j m/s. What is the velocity of the other fragment in vector notation?
*November 20, 2013 by Shek*

**physics**

A cherry bomb explodes into three pieces of equal mass. One piece has an initial velocity of 12m/sx^. Another piece has an initial velocity of 7.0m/sx^−5.0m/sy^. Part A What is the velocity of the third piece? Enter the x and y components of the velocity separated by a ...
*March 3, 2014 by bety*

**physics**

A football is thrown horizontally with an initial velocity of (16.5 m/s). Ignoring air resistance, the average acceleration of the football over any period of time is (-9.81 m/s2). (a) Find the velocity vector of the ball 1.62 s after it is thrown. (b) Find the magnitude and ...
*May 14, 2007 by micole*

**Calculus**

A particle moves with a fixed acceleration of 3 m/s^2. If its initial velocity is v(0)= 2 m/s, and its initial displacement is s(0)= 0 A)Find its velocity function v(t) B)How long does it take for the particle to reach the velocity 14 m/s? C)Find the distance traveled when its...
*July 6, 2014 by Bob*

**physics **

What is the velocity of a projectile with initial velocity 2m/s at an angle of 30degree to horizontal at the time 0.2s,0.5s,0.8s.Find the maximum height attained by projectile,total horinzontal distance travelled,seconds the projectile remains in air?what is the velocity of ...
*May 5, 2016 by murtem*

**physics**

A cyclist is cycling at a uniform velocity of 8m/s for 8 seconds. He then stops paddling and the cycle comes to rest in next ten seconds. Draw the velocity-time graph and calculate: (i) the average retardation.(ii) the distance covered with uniform velocity.(iii) the distance ...
*August 7, 2011 by aisha*

**maths/ physics**

An aircraft P flying at a constant height has a velocity of (300+j400)km/h. Another aircraft Q at the same height has a velocity of (200+j500) km/h. Determine a)the velocity of P in relation to Q. b) the velocity of Q in relation to P
*January 2, 2011 by Ian Hart*

**physics**

A football is thrown horizontally with an initial velocity of (16.5 m/s). Ignoring air resistance, the average acceleration of the football over any period of time is (-9.81 m/s2). Find the magnitude and direction of the velocity at this time and direction (as an angle) below ...
*May 15, 2007 by micole*

**science**

An aircraft travels through the air with a velocity of 200m/s due east. It is found to be travelling over the ground with a velocity of 220m/s in a direction of 20(degree) south of east.The difference between the two is due to thw wind velocity. What is the wind velocity?
*October 10, 2012 by liam*

**Math 104**

A belt connects two pulleys with radii 2 in and 4 in.. The velocity of point A on the belt is 25 ft/sec. What is the linear velocity and angular velocity for point B? What is the linear velocity and angular velocity for point C?
*September 15, 2015 by Rebecca*

**physics**

Which bear has the greater average velocity over the entire period? Which bear has the greater velocity at t = 8.0 min? Is the velocity of bear A always positive? Is the velocity of bear B ever negative?
*February 10, 2010 by christian*

**math**

5.Escape velocity is the speed necessary to escape the gravitational pull of a plant. The escape velocity of Earth is 11.3 kilometers per second, while the escape velocity of Saturn is 310% of that. What is the escape velocity of Saturn?
*July 8, 2014 by Johnny *

**Physics (checking my thinking)**

2 spheres, of unequal masses, hang on strings and are touching. Sphere a is pulled back to the left, string taught, and released, hitting sphere B at a known velocity. Sphere B's post impact velocity is known, and to the right. i have to find A's post collision velocity. ...
*December 14, 2008 by charlie*

**Physics**

A ball travels at 59.78 m/s for a distance of 16.45768956 meters, then decelerates at -89.67 m/s2 until is reaches a velocity of -89.67 m/s, then accelerates at 59.78 m/s2 until it reaches a velocity of 16.45758956 m/s, as shown in the graph to the right. What's the average ...
*September 21, 2009 by Jamie*

**physics**

Figure 8 shows position-time graphs of the straight-line movement of two brown bears in a wildlife preserve. Which bear has the greater average velocity over the entire period? Which bear has the greater velocity at t = 8.0 min? Is the velocity of bear A always positive? Is ...
*October 6, 2009 by Mureia*

**physics**

a particle covers 1/2 distance between A and B with a velocity V0. during 1/2 of the time required to cover the remaining distance the particle moves with a velocity V1 and rest moves with a velocity V2. find the average velocity of the particle
*April 14, 2015 by anubhab*

**Physics**

What is the velocity of the simple harmonic motion problem? Position of the graph is y= .4*cos(2pi*1/3*x)+1.2 I need to find the velocity as well as the acceleration. I have worked through it and keep getting that the velocity is 0. I don't believe that is correct.
*March 1, 2016 by Dib*

**Physics**

What is the velocity of the simple harmonic motion problem? Position of the graph is y= .4*cos(2pi*1/3*x)+1.2 I need to find the velocity as well as the acceleration. I have worked through it and keep getting that the velocity is 0. I don't believe that is correct.
*March 2, 2016 by Dib*

**physics**

a ball A collides elastically with another ball B initially at rest. A is moving with a velocity of 10m/s at an angle 60' from the line joining the center. select the correct alternative: a)velocity of ball A after collision is 5 m/s b)velocity of ball B after collision is 5&#...
*August 23, 2014 by priyanka*

**physics**

a body moves with a uniform velocity of 2m/sec for 5 sec then velocity was uniformly accelerated and a velocity of 10m/sec was achieved in next 5 sec.then brakes were applied uniformly and body comes to rest in next 10 sec.calculate a)acceleration and retardation produced b)...
*May 28, 2012 by parul*

**Physics( Explain and choose right answer) **

A 3 kg cat sitting on a 1.5 kg piece of cardboard on a frozen lake wants to jump to shore without touching the ice. If there is no friction between the cardboard and the ice, when the cat jumps. the cardboard will move in the opposite direction with a velocity: A. half as ...
*March 24, 2014 by Dan*

**Physics**

A horizontal pipe narrows from a diameter of 10 to 5 cm. For an incompressible fluid flowing from the larger diameter to the smaller: Question 5 options: 1.the velocity and pressure both increase. 2.the velocity increases and the pressure decreases. 3.the velocity decreases ...
*August 10, 2011 by Sonya*

**science**

a boat is traveling with a velocity of 5 km/hr upstream. The river is flowing at a velocity of 2km/hr downstream. What is the velocity of the boat compared to the riverbank? ►
*January 28, 2011 by john*

**mechanics**

a particle is moving with a velocity of 6m/s when subjected to an accelaration of -3m/s for 4 seconds.it then moves with a constant velocity for 2 seconds.draw a velocity-time graph.
*April 18, 2011 by ehm-zee*

**Physics**

Two objects A and B are involved in a totally elastic collision The mass of A is 8.8 kg and the mass of B is 0.5 kg. The velocity of A is 4.5 m/s and the velocity of B is 0 m/s. If they collide elastically, what will be the final velocity of A in m/s?
*July 9, 2012 by M*

**Physics**

A canoeist is trying to paddle upstream in a river that has a velocity of 6.1 m/s. a) If he can paddle his canoe at a velocity of 6.2 m/s will he make any headway? b)What will be his velocity relative to the shore?
*September 18, 2012 by Chidera*

**physics **

Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s.
*June 2, 2011 by erica*

**physics **

Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s.
*June 2, 2011 by jim*

**Honors Physics**

A canoeist is trying to paddle upstream in a river that has a velocity of 6.1 m/s. If he can paddle his canoe at a velocity of 6.2 m/s, will he make any headway? What will his velocity relative to the shore be?
*December 18, 2014 by Caroline*

**physics**

an ice skater starts out traveling with a velocity of (-3,-7) m/s. he performs a 3 second maneuver and ends with a velocity of (0, 5) m/s. (a) what is his average acceleration over this period? (b) a different ice skater starts with the same initial velocity, accelerates at (1...
*June 24, 2011 by aimee*

**Physics**

Two objects are moving in the xy-plane. No external forces are acting on the objects. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. Some time later, object A is...
*November 9, 2014 by Carl*

**Physics**

Two objects are moving in the xy-plane. No external forces are acting on the objects. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. Some time later, object A is...
*November 12, 2014 by Max*

**calculus **

velocity of a ball- if a ball is thrown into the air with a velocity of 40 ft/s, its height (in feet) after t seconds is given by y=40t-16t^2. find the velocity when t=2
*May 16, 2015 by Anonymous*

**Physics**

Given a velocity of 4m/s[E] and a second velocity of magnitude 6m/s (this is all that is given) Find the maximum and minimum values for the final velocity.
*July 11, 2010 by Natalie*

**Math - check answer**

Given s = 4t + 11t3, find the velocity when t = 1 s. velocity in m/s = My Answer: S'=4+33t^2 =4+33 =4+33 =37 velocity in m/s = 37 Can you please confirm this is correct. Thank you
*January 29, 2013 by Brownie*

**physics**

A ball is thrown from the ground level with a x-velocity of 25m/s and a y-velocity of 45m/s. What is the ball velocity at the maximum height of trajectory?
*August 17, 2015 by jay*

**physics**

A river is flowing along the east direction with a velocity of 10km/hr. A person heads towards north with a velocity of 2km/hr. what is the velocity of the person with respect to ground?
*November 30, 2014 by shreya*

**shahabdulatif science**

the velocity of the body moving in a straight line with a constant acceleration, is 10 m/s at a certain instant 't' . after 5 second the velocity become 20 m/s, the velocity 3 second before 't' was?
*October 23, 2015 by Umair *

**Physic assignment**

A 1.5okg ball whose velocity is 8mls southward collides with a 2kg ball traveling along the same path with a velocity of 3mls southward.if the velocity of the 2kg ball is 7.29mls southward after impact.what is the velocity of the 1.50kgball?
*March 5, 2014 by Anonymous*

**physics**

A body goes from P to Q with a velocity of 10 m/s and comes back from Q to P with a velocity of 20 m/s. What is the average velocity of the body during the entire trip?
*October 17, 2010 by HASANNY *

**physics**

A 2 kg particle has a velocity of (2i-3j) m/s and a 3kg particle has a velocity of (1i+6j)m/s.Find (a) the velocity of the center of mass(b) the total momentum of the system
*June 26, 2011 by TIshatilova*

**Math**

The velocity of an object is given by the formula v=25t-80, where the time is expressed in seconds and the velocity is expressed in feet per second. Find the times when the magnitude of the velocity is equal to 60 ft/s
*January 6, 2015 by Alex*

**Physics**

i have a graph that shows the motion of a cyclist. as the velocity(m/s) goes up:1, 2, 3... the elapsed time(s) also increases, 2, 4, 6... when the velocity is on 2 the time is on 2, when the velocity is on 3 the time is on 4... the line that is drawn points upward my question ...
*January 30, 2009 by y912f*

**physics**

On a very muddy football field, a 110 linebacker tackles an 75 halfback. Immediately before the collision, the linebacker is slipping with a velocity of 8.8 north and the halfback is sliding with a velocity of 7.2 east. a) What is the magnitude of the velocity at which the two...
*February 6, 2011 by anonymous*

**Calc I**

A particle moves at varying velocity along a line and s= f(t) represents the particle's distance from a point as a function of time, t. sketch a graph for f if the average velocity of the particle between t=2 and t=6 is the same as the instantaneous velocity at t=5. I know ...
*September 11, 2008 by Eva*

**physcis**

During a ski race, Kate uniformly accelerated at 3.15m/s^2 for 100meters. She then maintained this velocity for another 100m. she then uniformly decelerated at 6m/s^2 for 2 seconds. she accelerates back to her maximum velocity over the next 200meters in 16 seconds. she then ...
*March 4, 2010 by jake*

**physics**

During a ski race, Kate uniformly accelerated at 3.15m/s^2 for 100meters. She then maintained this velocity for another 100m. she then uniformly decelerated at 6m/s^2 for 2 seconds. she accelerates back to her maximum velocity over the next 200meters in 16 seconds. she then ...
*March 4, 2010 by jake*

**Physics**

An object is observed for a 5 second interval. During this time, the objects velocity increases from 2 m/s to a final velocity and the object travels 75 m. The acceleration of the object is constant. Given this information, which of the following statements is not correct? a)...
*October 7, 2012 by Lewis*

**6th grade**

Assume that the average speed of a moving object at 1 m was initial velocity and average spped of your cvart 5 m was its final velocity. calculate the change in velocity of your cart from 1 m to 5m. Show your work
*March 26, 2010 by Brittany*

**Physics**

Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s. PLEASE HELP IVE TRIED EVERYTHING!!!
*June 3, 2011 by Kristen*

**Math**

For a track and field athlete who can jump vertically, his distance above the ground is given by the formula s = 3.3t - 4.9t2. What is his initial velocity? velocity in m/s = My Answer S'= 3.3-9.8t S'(0) = 3.3 velocity in m/s = 3.3 Can you please confirm this answer Thanks
*January 29, 2013 by Brownie*

**Math**

The velocity of an object is given by the formula v=25t-80, where the time is expressed in seconds and the velocity is expressed in feet per second. Find the times when the magnitude of the velocity is equal to 60 ft/s. (3 marks)
*January 12, 2015 by Alex*

**physics**

Does a free falling object have a velocity of zero? If it does then is it zero for the initial velocity or the final velocity?
*April 18, 2010 by bob*

**Physics**

If a velocity that is 1 cm long represents a velocity of 12 km/h, what velocity does a vector 3 cm long drawn to the same scale represent? km/h
*December 21, 2011 by Riley*

**Sam E**

Let v(t)=t^2−3t be the velocity, in feet per second, of an object at time t , in seconds. (c) What is the meaning of the quantity v(4)? Select all that apply if more than one statement is correct. A. In how many seconds will the object have moved 4 ft. B. The object's ...
*January 28, 2016 by Math*

**Math Help**

Let v(t)=t^2−3t be the velocity, in feet per second, of an object at time t , in seconds. (c) What is the meaning of the quantity v(4)? Select all that apply if more than one statement is correct. A. In how many seconds will the object have moved 4 ft. B. The object's ...
*January 28, 2016 by Sam E*

**Science ( physics )**

A balloon is rising with a velocity of 4.9 m/sec releases an object from height of 96 m. a) How long after its release will the object reach the ground? b) what is the velocity of the object as it hits the ground? The object has in intial vertical velocity, at an initial ...
*August 1, 2006 by Margie*

**Physics**

An object moves in a circular path with constant speed. Is the object's velocity constant? Is its acceleration constant? Please explain. From what I've learned in my 8th grade science class, when velocity changes is when the direction or speed changes. So if it is moving in a ...
*January 10, 2007 by anonymous*

**physics**

a body travelling along a straight line travels one half of the total distance with the velocity V0.The remaining part of the distance was covered with the velocity of V1 for half of the time and with velocity V2 for other half of time. Find average velocity of the body.
*May 22, 2015 by samarth*

**biomechanics **

a sailboarder is zipping northeast across the river wit ha velocity of 10 m/s relative to the water the river current is moving the water north at a velocity of 3 m/s downstream. if the angle between the relative velocity of the sailboard and the river current is 30 degrees, ...
*February 21, 2013 by Anonymous*

**physics**

A car is moving with constant velocity. Which of the following is true? a) the car travels the same distance in each second b) car's velocity increases by the same amount in each second c)car's velocity decreases by the same amount in each second d)car's velocity changes by ...
*October 15, 2007 by Tammy*

**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 ...
*September 18, 2015 by BARNABAS*

**physics**

Object A, which has mass m and a velocity Voi,collides with the Object B,which has mass 2m and a velocity 1/2Voj.Following the collision ,object B has a velocity of 1/4Voi.(a) Determine the velocity of object A after the collision.(b) Is the collision elastic? If not, express ...
*October 29, 2009 by Randy*

**AP Physics**

I'm trying to derive the formula v^2 = v0^2 + 2a(x-x0) were zeros are subscripts my book tells me to derive it this way use the definition of average velocity to derive a formula for x use the formula for average velocity when constant acceleration is assumed to derive a ...
*June 18, 2009 by AP Physics*

**Physics**

A baseball player hits a pop fly that goes directly up in the air with an initial velocity of 45 m/s. What is the maximum height the base ball reaches? Work: initial velocity = 45 m/s, gravity= -9.8 m/s, final velocity = 0 m/s
*November 24, 2015 by Natascha *

**Physics help **

A car with a mass of 1800 kg is initially travelling with a velocity of 22 m/s [N] when it collides with a truck with a mass of 3200 kg traveling with a velocity of 14 m/s [E]. If the two vehicles become attached during the collision, determine their final velocity.
*January 28, 2016 by JACKIE CHAN*

**physics**

Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s. PLEASE HELP!! i have tried so many different ways and can't seem to get the answer
*June 2, 2011 by erica*

**physics**

an object accelerates uniformly along a straight line from a velocity of 10ms-1 until 25ms-1 in 5s. a)the velocity of the object during the first 10s of motion b)the time taken to reach a final velocity 50ms-1
*March 23, 2012 by shiva*

**Physics**

Plot a velocity time graph of a motorcycle that accelerates from rest for 10 secs upto a velocity of 20 m/s . It maintains this velocity for a further 20 secs and then retards so that it stops in 20 secs
*January 16, 2016 by Usakahyel*

**Science Plz help**

1. Acceleration involves a change in ____. speed velocity displacement direction 2. Which of the following statements about acceleration is true? Like velocity, acceleration has a direction. Your acceleration is positive when you speed up. Your acceleration is negative when ...
*March 29, 2013 by Jman*

**Acceleration physics**

1. A sprinter finishes the race with a velocity of 8.9 m/s. the sprinter accelerated to a stop at a rate of -2.7 m/s2. how long did it take the sprinter to come to a stop? 2. A cycllist starts from rest & reaches a velocity of 18 m/s southwest in 3.8 seconds. what was the ...
*May 12, 2014 by Durga*

**Physics **

A particle of mass =6.50 kg moves with a velocity v1=x1i+y1j+z1k. A second particle of mass =3.50 kg moves with a velocity v2=x2i+y2j+z2k. And a third particle of mass =6.30 kg moves with a velocity v3=x3i+y3j+z3k. Here, (x1,y1,z1)=(-2.5,5.4,1.2), (x2,y2,z2)=(-2.3,0.1,-2.5) ...
*October 13, 2014 by zhang135*

**physics**

a point moving on a straight line traversed half the distance with a velocity v0. the remaining part of the distance was covered with velocity v1 for half the time, and with velocity v2 for the other half of the time. find the mean velocity of the point averaged over the whole...
*July 3, 2011 by pavatharani*

**Science**

1.A model train traveling at a constant speed around a circular trak has a constant velocity. True False**** 2.Which of the following would be affected if a soaring eagle changes direction but remained at a constant speed? A. Acceleration only B. Velocity only**** C. ...
*January 14, 2015 by Callie*

**Physics**

Sketch the velocity vs. time graph for an object that: • from 0 to 2 seconds has moved with constant velocity of 3 m/s • from 2 to 5 seconds was at rest • from 5 to 10 seconds increased its velocity, reaching 5 m/s at t =10 s. Could you please help in describing what each line...
*February 10, 2011 by Kayla*

**H. Physics 11th grade**

while flying over the grand canyon, the pilot slows the plane down to one-half the velocity in item 3. If the wind's velocity is still 75 km/h toward the southeast, what will the plane's new resultant velocity be?
*September 29, 2010 by Abby*

**(MCV4U) Vectors **

The air velocity of helicopter Hal is 200km/h due west. Hal's ground velocity is 180km/h in the direction N80*W. Determine the wind velocity. Please help! I know i should be drawing a diagram but I am very confused with how to do this question! Thank you!
*October 3, 2014 by Laura*