Wednesday

December 7, 2016
Number of results: 15,027

**physics**

for a free throw in basketball,find an equation for the final angle to go into the hoop in terms of y and x to the hoop and the initial angle. I can't seem to get an equation with only those variables. I always get stuck with others like time and velocity. how do i do this?

*February 3, 2008 by Mischa*

**Physics**

A man stands on the roof of a 10.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 38.0 above the horizontal. You can ignore air resistance. Calculate the horizontal distance from the base of the building to the point where the rock strikes ...

*February 6, 2008 by Ava*

**science (motion)**

You are walking toward the back of a bus that is moving forward with a constant velocity. Describe your motion relative to the bus and relative to a point on the ground. A car travels at an average speed of 30 m/s for .8 h. Find the total distance traveled in km.

*April 29, 2009 by lol*

**Physics**

In an elastic collision: mass a is 1kg, and is moving at 100ms^1 in the +ve x direction when it hits mass b, 10kgs at rest. Given: mass a moves off at 80 ms^1 in the -ve x direction. What's the final velocity of mass b. Using cons of momentum, i say 2 ms^1 in the +ve x ...

*June 16, 2009 by charlie*

**PHysics**

A ballplayer standing at home plate hits a baseball that is caught by another player at the same height above the ground from which it is hit. The ball is hit with an initial velocity of 20.6 m/s at an angle of 58.9 degrees above the horizontal. How high will the ball rise?

*November 5, 2009 by Anonymous*

**physics**

skydiver not in freefall because wind resistance prevents her from accelerating indefinitely. If skydiver weighs 750N whats the force due to wind resistance after reaches terminal velocity but before her parachute opens traveling at 200 km.hr

*March 7, 2010 by jco*

**college algebra**

When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -5t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the initial velocity (speed) in ft/sec and “k” is the initial height in feet (as if you were on...

*March 29, 2010 by renee*

**math**

When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -16t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the initial velocity (speed) in ft/sec and “k” is the initial height in feet (as if you were ...

*May 5, 2010 by casey*

**math**

When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -16t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the initial velocity (speed) in ft/sec and “k” is the initial height in feet (as if you were ...

*May 5, 2010 by casey*

**Physics**

A football player punts the football so that it will have a hang time of 4.5s and land 46m away. If the ball leaves the player's foot 1.5m above the ground, what must be (a) the magnitude and (b) angle (relative to the horizontal) of the ball's initial velocity?

*June 28, 2010 by Pat*

**physics**

A firetruck is traveling at a velocity of +20 m/s in the x direction. As the truck passes x=63m it shoots a tennis ball backwards with a speed of 20 m/s relative to the truck at an angle of 39° from a height of 1.4 m. Neglect air resistance. At what x value does the tennis ...

*November 20, 2010 by sandhu*

**physics**

A firetruck is traveling at a velocity of +20 m/s in the x direction. As the truck passes x=63m it shoots a tennis ball backwards with a speed of 20 m/s relative to the truck at an angle of 39° from a height of 1.4 m. Neglect air resistance. At what x value does the tennis ...

*November 21, 2010 by sandhu*

**physics**

A firetruck is traveling at a velocity of +20 m/s in the x direction. As the truck passes x=63m it shoots a tennis ball backwards with a speed of 20 m/s relative to the truck at an angle of 39° from a height of 1.4 m. Neglect air resistance. At what x value does the tennis ...

*November 21, 2010 by sandhu*

**Calculus**

a rifle aimed horizontally and 5 feet above level ground fires a bullet with a muzzle velocity of 3000 ft/sec. How far does the bullet travel from the end of the muzzle before it strikes the ground? (Ignore air resistance)

*February 16, 2011 by Jr*

**Calculus**

a rifle aimed horizontally and 5 feet above level ground fires a bullet with a muzzle velocity of 3000 ft/sec. How far does the bullet travel from the end of the muzzle before it strikes the ground? (Ignore air resistance)

*February 16, 2011 by Jr*

**PHYSICS**

An object undergoes simple harmonic motion. During that motion the object needs 1.1 seconds to reach one point of zero velocity from the previous such point. If the distance between those points is 0.3 m, calculate the period.

*April 7, 2011 by Unknown*

**trig**

An aifplane is flying on a compass heading (bearing) of 170* at 460 mph. A wind is blowing with the bearing 200* at 80mph. a) Find the component form of the velocity of the airplane. b) Find the actual ground speed and direction of the airplane.

*May 25, 2011 by ale*

**physics**

an 80 kg boy holding on to a helium balloon jumps off of a 20m tall building and floats to the ground. If the boant force of the balloon is 750 N upward, what is the boy's acceleration and final velocity just before he touches the ground?

*October 4, 2011 by zahid*

**Physics**

Cheryl runs a race on a 400.0 m circular track. She starts running east of the starting line and then circles the track and falls, stopping 1.00 m west of the starting line. Her time is 80.0 s. What was her average velocity? I believe that it would be -1.25 x 10^-2 m/s, is ...

*October 12, 2011 by Mishaka*

**physics**

a cannon fire a bullet into a castle. leave the gun with velocity of 110 with an angle of 20. the bullet reaches highest point at P when it is 1 m above the castle. What is the height of the top of the castle? and waht is the horizontal distamce between the accnon and the castle

*February 5, 2012 by Elise*

**physics**

The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.41 rad/s2. It accelerates for 25.5 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 65.5 s after it begins rotating.

*February 10, 2012 by qwertzuiop*

**physics**

A man stands on the roof of a 10.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 34.0 above the horizontal. You can ignore air resistance. Calculate the horizontal distance from the base of the building to the point where the rock strikes ...

*February 21, 2012 by Rei*

**physics**

A man stands on the roof of a 10.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 34.0 above the horizontal. You can ignore air resistance. Calculate the horizontal distance from the base of the building to the point where the rock strikes ...

*February 21, 2012 by Rei*

**Physics (Mechanics)**

An electron of mass 9.1E-31 kg is released from rest at a distance of 7.1 E-10 m from a fixed electron. The force on the movable electron is given by the function F = 2.3E-28/r^2, where r is the distance between the electrons. Find the maximum velocity (in meters/second) of ...

*April 12, 2012 by andrew*

**Physics**

A baseball teams ace pitcher throws fast balls at a velocity of 160kmh, the balls are released at a height of 1.6m from the ground, given that the distance between pitcher and plate is 18.4m how far has the ball dropped when it passes over the plate?

*July 29, 2012 by Alex*

**physics**

Consider the following set of equations, where s, s0 and r have units of length, t has units of time, v has units of velocity, g and a have units of acceleration. Take k to be dimensionless.Identify if these are dimensionally correct or incorrect. 1)v^2= 2as + kav 2)s = s0 + ...

*September 2, 2012 by selena*

**Physics**

The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.39 rad/s^2. It accelerates for 30.3 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 69.1 s after it begins rotating.

*September 30, 2012 by Arthur*

**Physics**

Consider a plane with a velocity relative to the air of 198 m/s in a westerly direction. If the wind has a speed relative to the ground of 56 m/s (in an easterly direction), how long does it take for the plane to travel from one city to another that is due west of the first by...

*October 19, 2012 by Lily*

**Physics **

A baseball player uses a pitching machine to help him improve his batting average. He places the 43.4 kg machine on a frozen pond. The machine ﬁres a 0.0546 kg baseball horizontally at a speed of 44.8 m/s. What is the magnitude of the recoil velocity of the machine? ...

*December 2, 2012 by Emily*

**Physics**

Two particles of masses 6kg and 3kg are attached to the two ends of an inextensible string passing over a pulley.the string is kept taut and the masses are released.. Calculate the common velocity of the particle and the distancetravelled after 5s

*February 8, 2013 by Shazra*

**Algebra II**

A rock is thrown upward with a velocity of 28 meters per second from the top of a 36 meter high cliff, and it misses the cliff on the way back down. When will the rock be 9 meters from the water below. Round to two decimal places.

*February 24, 2013 by Jeannie*

**Algebra II**

A rock is thrown upward with a velocity of 28 meters per second from the top of a 36 meter high cliff, and it misses the cliff on the way back down. When will the rock be 9 meters from the water below. Round to two decimal places.

*February 25, 2013 by Jeannie*

**Physics**

A hockey puck is sliding on frictionless ice. It slams against the wall and bounces back toward the player with the same speed that it had before hitting the wall. Does the velocity of the hockey puck change in this process? Explain.

*April 10, 2013 by Crystal*

**physics**

A 1400 kg car traveling at 15.5 m/s to the south collides with a 4100 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?

*April 19, 2013 by Anonymous*

**physics**

An Australian emu is running due north in a straight line at a speed of 13.0 m/s and slows down to a speed of 9.80 m/s in 3.10 s. (a) What is the magnitude and direction of the bird’s acceleration? (b) Assuming that the acceleration remains the same, what is the bird’s ...

*June 16, 2013 by louis aaaaa*

**Physics**

An Australian emu is running due north in a straight line at a speed of 13.0 m/s and slows down to a speed of 10.9 m/s in 3.70 s. (a) What is the magnitude and direction of the bird’s acceleration? (b) Assuming that the acceleration remains the same, what is the bird’s ...

*September 2, 2013 by Brianna*

**Physics**

This question has to do with kinematics graphing. I CAN NOT REPRODUCE THE GRAPH BUT hope that some help can be given to me with this question. The position versus time for a certain object moving along the x-axis. The object's initial position is -2 m. Find the instantaneous ...

*September 4, 2013 by Deawn*

**physics**

The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.45 rad/s2. It accelerates for 29.5 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 63.7 s after it begins rotating.

*September 22, 2013 by Sue*

**physics**

a man stands on the roof of a 15.0m tall building and throws a rock with a velocity of magnitude 30.0m/s at an angle of 33 degrees above the horizontal. ignoring resistance calculate the horizontal distance from the base of the building to the point where the rock strikes the ...

*June 27, 2014 by kristen*

**physics**

A ball is tossed with enough speed straight up so that it is in the air several seconds. Assume upward direction is positive and downward is negative.What is the acceleration of the ball during any of these time intervals? What is the acceleration of the ball at the moment the...

*September 8, 2014 by Mia*

**Physics (projectile motion)**

Projectile fired in earths gravitational field at a height of of 0.90m above ground level, with a horizontal velocity of 9m/s. How far will the ball fly before hitting the ground? How long will the ball stay in the air?

*November 2, 2014 by Darrien*

**physics**

a man having a mass of 60 kg exerts a horizontal force of 200 newton in pushing a 90 kg object a distance of 60 meters along horizontal floor. he does this at constant velocity in 3 seconds.the weight of this man is[in newton,taking g =10m/s square]

*December 28, 2014 by komal yaseen*

**physics(waves)**

A wave has a speed of 340m/s and a period of 0.28ms. what's the wavelength? so I worked this and I got 95.2m but the answer to d question says 0.095m. period(T) = 1/F (since F = 1/T) therefore, F = 1/0.28 = 3.5714 wavelength = velocity/frequency w = 340/3.5714 = 95.2m (Isn't ...

*February 23, 2015 by Francis *

**please assist me with science**

1.a car moves at a constant velocity up an inclined plane angle of 28 degrees with the horizontal.The coefficient of friction is 0.387. The force exerted by the engine on the car is 588N... A.Calculate the of the car? B. Frictional force acting on the car

*March 2, 2015 by Johanna*

**queen's science Academy**

A stone is dropped from the top of a tall building and at the same time another stone is thrown vertically upward from the ground level with a velocity of 20m/s the stones meet exectity 2s after their release how tall is the building

*June 14, 2015 by Aisha naabba*

**Physics**

A 2.0 kg block of iron slides along a floor, decreasing its speed from 4.0 m/s to 1.0 m/s. a) How much work does the frictional resistance of the floor do on the block? b) If the reduction in velocity occurred over a distance of 10 m, what was the force of friction acting on ...

*June 24, 2015 by idnchfywek*

**Physical**

At t = 0 s time a stone is thrown from the top of a cliff above a lake. Another stone is thrown down from the same point , 1.6 s later , with a initial velocity of 32.0 m / s. The two stones hit the water in one instant. Determine the cliff height.

*November 25, 2015 by Michel*

**Physics**

Consider a plane with a velocity relative to the air of 195 m/s in a westerly direction. If the wind has a speed relative to the ground of 53 m/s (in an easterly direction), how long does it take for the plane to travel from one city to another that is due west of the first by...

*February 3, 2016 by Heather *

**Physics**

1, A Body Of Mass 6kg Was Acted Upon By A Constant Force Of 18N. Calc Its Velocity In 5sec. 2. A Car Moving At 108km/hr Was Gradually Brought To Rest By Constant Force Of 2500N After 8sec. Calc The Decelleratio

*July 12, 2016 by Jane*

**Physics**

A bird watcher meanders through the woods, walking 1.13 km due east, 1.01 km due south, and 3.95 km in a direction 49.8 ° north of west. The time required for this trip is 1.965 h. Determine the magnitudes of the bird watcher's (a) displacement and (b) average velocity.

*September 12, 2016 by Shelby *

**school**

An Australian emu is running due north in a straight line at a speed of 13.0 m/s and slows down to a speed of 11.0 m/s in 2.40 s. (a) What is the magnitude and direction of the bird’s acceleration? (b) Assuming that the acceleration remains the same, what is the bird’s ...

*October 1, 2016 by Anonymous*

**Physics**

a softball batter hits a fly ball that is caught 3.8 seconds later, 88m from home plate. The ball is caught at the same height from which it was thrown. What was its initial velocity? What is the maximum height above its launch point that it reached?

*November 8, 2016 by Bill*

**Physics**

A uniform electric field of magnitude 395 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 3.40 cm. What is the work done by the field on the electron? What is the change in potential energy associated with the ...

*September 22, 2010 by chuck*

**Physics**

A block of mass M=6 kg and initial velocity v=0.8m/s slides on a frictionless horizontal surface and collides with a relaxed spring of unknown spring constant. The other end of the spring is attached to a wall. If the maximum compression of the spring is 0.2 m, what is the ...

*July 21, 2013 by Helena Beau*

**math**

A particle moves along straight line such that its displacement S meters from a given point is S = t^3 – 5t^2 + 4 whee t is time in seconds. Find (a) The displacement of particle at t = 5 (b) The velocity of the particle when t = 5 (c) The values of t when the particle is ...

*February 17, 2015 by kudu*

**Physics**

You are driving off of a horizontal cliff, and your car has a horizontal velocity of 29.33 m/s at the instant you leave the cliff. The cliff is an unknown height above a rocky ravine, but you land 146.8 m away from the sheer cliff face. How tall is the cliff?

*September 23, 2015 by Ashley*

**Physics - KE/rotation**

In Figure 11-32 (which shows a ball at the top of an incline, at the bottom of the incline a loop begins with radius R and Q a point on the loop lined up with the center of the loop), a solid brass ball of mass m and radius r will roll without slipping along the loop-the-loop ...

*March 25, 2007 by COFFEE*

**physics**

A ferris wheel bucket travels around at 3.40 m/s. The radius of the ferris wheel is 39.8 m. What is the ferris wheel's angular velocity?

*September 27, 2016 by jasmine*

**Physics**

A thin rod of length L and mass M rotates about a vertical axis through its center with angular velocity w. The rod makes an angle B with the rotation axis. Determine the angular momentum of the rod.

*April 18, 2008 by Nik*

**college physics**

three carts of masses 4.0kg, 10kg, and 3.0kg move on a frictionless horizontal track with speeds of 5.0m/s, 3.0m/s, and 4.0m/s. The carts stick together after colliding. find the velocity of the three carts.

*June 1, 2008 by sarah*

**physics**

A plane can fly at Mach 1.47, which means the speed of the plane is 1.47 times the speed of sound in air. What is the angle between the direction of propagation of the shock wave and the direction of the plane's velocity? How is the answer 47.1 degrees

*October 26, 2010 by flame*

**Physics 2(Plz Help! :) :) ;))**

A bullet leaving a rifle at an angle of 45 degrees travels a distance of 10 Km determine: A). The muzzle velocity B). What angle would you have to shoot the same bullet to go HALF the distance? Lower angle

*February 24, 2011 by Jessica*

**PHYSICS**

A ball is thrown upward. It leaves the hand with a velocity of 13.8 m/s, having been accelerated through a distance of 0.495 m. Compute the ball's upward acceleration, assuming it to be constant. Whats the upward acceleration?

*September 15, 2011 by austin*

**physics**

A train travels 50 km and stops to pick up freight. It then travels another 150 km before dropping off the freight. Its total travel time is 11 hours. What is the average velocity of the train if it travels a straight track?

*September 20, 2011 by shili*

**math**

The horizontal range, R, in feet that a baseball travels is modeled by this equation. The initial velocity, v, is 90 feet a second. The ball is pitched at an angle of è degrees with the horizontal. At what angles will the ball travel 200 feet?

*October 21, 2011 by Sarah*

**Physics**

A ball is attached to a paddle by a rubber band. The ball is initially moving away from the paddle with a speed of 4.0 m/s. After 0.2 seconds it is moving towards the paddle with a velocity of 3.5 m/s. What is the average acceleration in m/s2 during this time?

*September 30, 2012 by Mel*

**physics**

What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

*October 29, 2012 by Tom*

**physics**

What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

*October 29, 2012 by Tom*

**physics**

What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

*October 29, 2012 by Tom*

**physics**

What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

*October 30, 2012 by Tom*

**PHYSICS**

A person on an apartment balcony holds a ball over the balcony and throws it directly upwards with an initial velocity of 30 m/s [up]. The ball was thrown from 15 m above the ground. How long will it take for the ball to hit the ground?

*February 19, 2013 by Tasha*

**physics**

a golfer hits a golf ball which is 30m high infront of a 20m high tree. the ball just passes over the top of the tree. what was the vertical component of the initial velocity of the ball?

*April 10, 2013 by amy*

**Physics**

A ceiling fan starting from rest reaches an angular velocity of 30 rev/sec in 5 sec. What is the angular displacement of the fan during these 5 sec? Can you show me the steps need to figure this question out? Thanks!

*April 24, 2013 by Mike*

**Physics**

A student throws a set of keys vertically upward to her sorority sister, who is in a window 3.80 m above. The keys are caught 1.80 s later by the sister's outstretched hand. (b) What was the velocity of the keys just before they were caught?

*September 11, 2013 by Kelsey*

**Science**

The slevator starts at 1st floor and accelerated 1m/s^2 for 6 seconds and continues at a constant velocity for 12 seconds more and is then stopped in 4 seconds with constant deceleration. If the floors are 3 meters apart at what floor does the elevator stops?

*March 2, 2014 by Thor*

**physics**

A child drops a ball from a height of 10 m. Assume its acceleration increases uniformly at the rate of 10m/s2. find the velocity with which the ball strikes the ground. Find the time taken to the ball reach the ground.

*June 9, 2014 by Anonymous*

**physics**

A child drops a ball from a height of 10 m. Assume its acceleration increases uniformly at the rate of 10m/s2. find the velocity with which the ball strikes the ground. Find the time taken to the ball reach the ground.

*June 9, 2014 by Anonymous*

**Physics**

A particle is moving along a straight line and its position is given by the relation x=( t3-6t2-15t+40)mm. Find:- (a). The time at which velocity is zero. (b). Position & displacement of the particle at that point. (c). Acceleration for the particle at that line.

*June 24, 2014 by Ram kumar*

**physic**

a stone A is dropped from the top of tower and B is thrown downward from same point 2 seconds later with initial velocity of 30 ms , if the same stone A and B reach the ground at same time, find height of the tower

*July 25, 2014 by Apoorva*

**physics**

A ball is attached to a paddle by a rubber band. The ball is initially moving away from the paddle with a speed of 4.4 m/s. After 0.33 seconds it is moving towards the paddle with a velocity of 2.8 m/s. What is the average acceleration in m/s2 during this time?

*October 3, 2014 by Anonymous*

**Physics**

A cannon is fired from the ground at an angle of 30 degrees. It is being shot an an initial velocity of 200m/s. What is the maximum height of the cannon ball? How fat will the cannon ball travel before it hits the ground

*November 7, 2014 by James*

**physics**

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 tolu*

**Physics**

a missile is launched off a jet fighter travelling 300 meters per second. it accelerated with a constant acceleration of 100 meters per second. when it has traveled 5000 meters what will its velocity be?

*October 5, 2015 by Rachael*

**math**

a diver jumps from a platform at time t=0 seconds. the distance of the diver above water level at time t is given by s(t)=-4.9t^2 +4.9t+10, where s is in meters c.) find when velocity equal zero. find the maximum height of the diver thank you

*October 11, 2015 by jelloh*

**Physics**

A(n) 12600 lb railroad car traveling at 7.4 ft/s couples with a stationary car of 6490 lb. The acceleration of gravity is 32 ft/s2. What is their velocity after the collision?Answer in units of ft/s. What impulse did the first car receive?Answer in units of lb s.

*April 7, 2016 by Anonymous*

**Pysics**

A(n) 12600 lb railroad car traveling at 7.4 ft/s couples with a stationary car of 6490 lb. The acceleration of gravity is 32 ft/s2. What is their velocity after the collision?Answer in units of ft/s. What impulse did the first car receive?Answer in units of lb s.

*April 9, 2016 by PLS HELP!!*

**physics**

A particle is moving along a straight line and its position is given by the relation x=( t3-6t2-15t+40)mm. Find:- (a). The time at which velocity is zero. (b). Position & displacement of the particle at that point. (c). Acceleration for the particle at that line.

*June 19, 2016 by umesh*

**physics**

A particle is moving along a straight line and its position is given by the relation x=(t3- 6t2- 15t+40) m FIND a) The time at which velocity is Zero, b) Position and displacement of the particle at that point. c) Acceleration for the particle at that line.

*June 19, 2016 by umesh*

**Physics**

If a ball is launched straight upwards from the ground with an initial velocity of 20.0 m/s, how long does the ball take to reach a height of 15.0 m on the way up? For the same situation, at what time does the ball reach 15.0 m on the way back down?

*September 18, 2016 by Chad*

**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).

*September 22, 2016 by sally*

**physics**

A missile launched at a velocity of 30.0 m/s at an angle of 30.0 to the normal. What is the maximum height the missile attains? sin 60 = 0.866025404 0.866025404 x 30 = 25.98076211 25.98076211 x 25.98076211 / 2 / 9.8 = 34.4 m

*April 2, 2008 by Jon*

**physics**

A box of mass 18.8 kg is pulled to the right with a horizontal force of 9 N. If the box moves to the right with a constant velocity of 1.06 m/s, what is the frictional force acting on the box?

*November 16, 2009 by Jimmy*

**physics**

A ball rolls off a shelf with a horizontal velocity of v. At what horizontal distance from the shelf does the ball land if the height of the shelf is h above the floor?

*May 24, 2010 by Anonymous*

**physics**

in a reference frame s, the volume of a cube is 1000cc.find the volume of the cube in a reference s'.which is moving paralell to the edge of the cube with a velocity 80%of that of light

*November 26, 2011 by biniya*

**Physics **

How high does the 35g ball go if the ball leaves the spring at the point shown in image? K=953 N/m and Xa=0 and Xb=0.120m (b)? What is the velocity of the ball when it leaves the spring?

*March 26, 2012 by bobby*

**Chemistry**

Kinetic energy = 1/2 mv^2 where m is the mass of the particle and v is the velocity of the particle. A joule is the SI unit for energy and is kg.m^2/s^2. Find the energy in joules of a 56.7 g mass moving at the speed of 70. km. hr.

*November 5, 2012 by Lina*

**math**

A satellite's escape velocity is 6.mi./sec, the radius of the earth is 3960 mi, and the earth's gravitational constant (g) is 32.2 ft./sec^2. How far is the satellite from the surface of the earth?

*December 8, 2013 by Ernie*

**Physics**

An object with a mass of 5 kg moves at a constant velocity when it is pulled by a horizontal force of 5 N on a level surface. What is the acceleration of the object if the object is pulled with a force of 25 N?

*March 25, 2014 by Dienta*

**physics**

a bus travels from one point to another wuth a speed of 40km/h and returns with a speed of 60km/h.what is e average speed and average velocity of the bus?

*August 7, 2014 by Anonymous*

**Physics**

a bus travels from one point to another wuth a speed of 40km/h and returns with a speed of 60km/h.what is e average speed and average velocity of the bus?

*August 7, 2014 by Zubi*