Wednesday
May 6, 2015

Homework Help: Science: Physics

Recent Homework Questions About Physics

physics
A lead ball of mass 60kg hangs from a string. A piece of putty mass of 15kg hits the ball with velocity of 12m/s. If the putty sticks to the ball, what will be their velocity immediately after the impact?
Wednesday, January 21, 2015 at 2:37am

physics
5. An object is dropped. If one could neglect air resistance a. what would its velocity (magnitude and direction) be after 1 s? b. what would its displacement (magnitude and direction) be after 1 s?
Wednesday, January 21, 2015 at 12:30am

physics
You set your stationary bike on a high 80 N friction like resistive force and cycle for 30 min at speed of 8 m/s. Your body is 10% efficient at converting chemical energy in your body into mechanical work. What is your internal chemical energy change? How long must you bike to...
Tuesday, January 20, 2015 at 11:28pm

Physics
mrubber stopper = 0.07Kg mmetal washers = 0.196Kg radius = 1.0m total time = 12 seconds # of revolutions = 10 revolutions With this data, calculate the centripetal Force (Fc) (to 2 decimals) of the rubber stopper in its "orbit".
Tuesday, January 20, 2015 at 11:08pm

Physics
mass rubber stopper = 0.07Kg mass metal washers = 0.196Kg radius= 1.0m total time = 12 seconds # of revolutions = 10 revolutions With this data, calculate the Period (T) of the rubber stopper in its "orbit".
Tuesday, January 20, 2015 at 11:07pm

Physics
A 500 kg car experiences a frictional force of 3080 N while turning, if the car is traveling around a turn of radius 17 m what is the velocity of the car?
Tuesday, January 20, 2015 at 11:02pm

physics
The curves on a race track are banked to make it easier for cars to go around the curves at high speed. Draw a free-body diagram of a car on a banked curve. From the motion diagram, find the direction of the acceleration. The acceleration is directed toward the center of the ...
Tuesday, January 20, 2015 at 10:49pm

Physics
how much work is needed to stop a 20kg bullet moving with a speed of 150m/s?
Tuesday, January 20, 2015 at 10:45pm

Physics
A motorcycle has a mass of 250kg. It goes around a 13.7 m radius turn at 96.5 km/hr. What is the centripetal force? a. 2.95x10^3 N b. 4.31x10^4N c. 1.31x10^4 N d. 719N
Tuesday, January 20, 2015 at 10:41pm

physics
A fire engine must lift 30 kg of water a vertical distance of 20 m each second. What is the amount of power needed for the water pump for this fire hose? P=W/t=Fd/t=mgd/t (30)(9.8)(20)/1= 5880 W is that right?
Tuesday, January 20, 2015 at 10:32pm

Physics
A child swings from a rope of length L. If she starts her swing with the rope horizontal what is her acceleration at the bottom of the swing? a. 2gL^2 b. g/2 c. g d. 2g/l e. 2g
Tuesday, January 20, 2015 at 10:09pm

Physics
Abby is swinging a ball on a string in a circle with a constant tension. Which of the following quantities is constant? a. acceleration b. speed c. none of the others d. velocity e. force
Tuesday, January 20, 2015 at 10:04pm

Physics
A point on a wheel rotating at 5revs/s is located 0.20m away from the axis. What is the centripetal acceleration? a. 198m/s^2 b. .05m/s^2 c. 48m/s^2 d. 1.35m/s^2
Tuesday, January 20, 2015 at 10:04pm

physics
In a physics lab, students are asked to predict how the acceleration of the block sliding up a ramp compares to the acceleration down the ramp compares to the acceleration down the ramp. The block slides up a somewhat rough surface inclined at an angle of theta above the ...
Tuesday, January 20, 2015 at 8:28pm

Physics
The position of a point A is specified as A (5.7).the y-coordinate is ?
Tuesday, January 20, 2015 at 7:59pm

physics
Light is incident from air onto a flat transparent slab of material, at an angle of 62.2° with the normal. The reflected ray and the refracted ray are perpendicular to each other. What is the index of refraction of the transparent substance?
Tuesday, January 20, 2015 at 7:35pm

physics
The standard piece of apparatus used to measure distance in the laboratory is what?
Tuesday, January 20, 2015 at 7:25pm

physics
The S.I. Unit of displacement is what?
Tuesday, January 20, 2015 at 7:14pm

physics
When a ball is thrown upward, it experiences a downward accelera- tion of magnitude 9.8 m/s 2 , neglecting air resistance. With what velocity must a ball leave a thrower’s hand in order to climb for 2.2 s before stopping?
Tuesday, January 20, 2015 at 6:28pm

physics
If a car crashes into a wall, the wall puts force on the car. The car puts an equal force on the wall. What does each force do?
Tuesday, January 20, 2015 at 5:22pm

Physics 152
I was able to come up with the answers through trial and error, and the answer for the charge +q makes sense, but I don't understand why the answer for the -q is correct. Please help. A positive point charge +q1, a second point charge q2 that may be positive or negative, ...
Tuesday, January 20, 2015 at 3:09pm

physics
Two small beads having positive charges q1 = 34.0 nC and q2 = 55.0 nC are fixed so that the centers of the two beads are separated by a distance d = 0.450 m as shown in the figure. At what position x relative to q1 could you place a third small bead of unknown charge q in ...
Tuesday, January 20, 2015 at 12:32pm

physics
a student is helping her teacher move a 9.5 kg box of books what net sideways force must she exert on the box the slide it across so that it accelerates at 1.0 m/s2
Tuesday, January 20, 2015 at 10:54am

Physics
Calculate the magnitude of the linear momen- tum for each of the following cases a) a proton with mass 1.67 × 10−27 kg mov- ing with a velocity of 6 × 106 m/s. Answer in units of kg · m/s.
Monday, January 19, 2015 at 11:50pm

Physics
Calculate the magnitude of the linear momen- tum for each of the following casesEarth (m = 5.98 × 1024 kg) moving with an orbital speed equal to 26200 m/s. Answer in units of kg · m/s.
Monday, January 19, 2015 at 11:47pm

Physics
A railroad car with a mass of 2.33 × 104 kg moving at 3.71 m/s collides and joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.44 m/s.What is the final speed of the three joined ...
Monday, January 19, 2015 at 11:30pm

physics please help
the potential difference across a load is 9V. explain what this means in more fundamental terms.
Monday, January 19, 2015 at 10:26pm

physics
Shawn and his bike have a total mass of 57.1 kg. Shawn rides his bike 1.3 km in 14 min at a constant velocity. The acceleration of gravity is 9.8 m/s 2 . What is Shawn’s kinetic energy?
Monday, January 19, 2015 at 8:35pm

physics
A particle of charge +18.1C and mass 7.06 × 10-5 kg is released from rest in a region where there is a constant electric field of +414 N/C. What is the displacement of the particle after a time of 3.06 × 10-2 s? Please explain the steps, thank you.
Monday, January 19, 2015 at 6:18pm

Physics
A particle moves along the x axis. Its position is given by the equation x = 2.00 + 3.20t - 3.85 t2 with x in meters and t in seconds. Determine its position at the instant it changes direction. (in m)
Monday, January 19, 2015 at 6:00pm

Physics
A speedboat moving at 29 m/s approaches a no-wake buoy marker 98.3 m ahead. The pilot slows the boat with a constant acceleration of -3.61 m/s2 by reducing the throttle. How long does it take the boat to reach the buoy? (in s)
Monday, January 19, 2015 at 5:56pm

physics
The 80kg student balances a 1300kg elephant on a hydraulic lift. (U-Tube) What is the diameter of the piston the student is standing on? When a second student joins the first, the height difference between the liquid levels in the right and left pistons is 40cm . What is the ...
Monday, January 19, 2015 at 5:06pm

Physics
Negating air resistance, a block weighing 1.0 kg will fall _________ a 3.0 kg block Answer: The same rate as
Monday, January 19, 2015 at 4:48pm

physics
A car (mass = 750 kg) is initially moving with velocity 30 m/s. The driver slowly presses on the brakes and bring the car to a stop, traveling 50 m in the process. Calculate the force of friction between the car and the ground that brings it to a stop. Draw a free-body diagram...
Monday, January 19, 2015 at 4:00pm

Physics
A driver in a car traveling at a speed of 56.1 mi/h sees a deer 103 m away on the road. Calculate the minimum constant acceleration that is necessary for the car to stop without hitting the deer (assuming that the deer does not move in the meantime). (in m/s^2)
Monday, January 19, 2015 at 3:53pm

Physics
A stone is dropped from the top of a cliff. It hits the ground below after 3.12 s. How high is the cliff? (in m)
Monday, January 19, 2015 at 3:35pm

Physics
In coming to a stop, a car leaves skid marks 97.0 m long on the highway. Assuming a deceleration of 6.60 m/s2, estimate the speed of the car just before braking. (in m/s)
Monday, January 19, 2015 at 3:31pm

Physics
At highway speeds, a particular automobile is capable of an acceleration of about 1.52 m/s2. At this rate, how long does it take to accelerate from 74.0 km/h to 104.0 km/h? (in s)
Monday, January 19, 2015 at 3:25pm

Physics
A 100N force acting on a lever 2m from the fulcrum balances an object 0.5m from the fulcrum on the other arm. What is the weight of the object(in newtons)?What is it's mass (in kg)?
Monday, January 19, 2015 at 1:21pm

physics
A 30.0 kg block falls from a height of 30,4 m. assuming a closed system its speed just before hitting the ground is about?
Monday, January 19, 2015 at 12:22pm

physics
A truck travels 1710 m uphill along a road that makes a constant angle of 5 . 08 ◦ with the horizontal. Find the magnitude of the truck’s horizontal component of displacement. Answer in units of m.
Monday, January 19, 2015 at 12:18pm

physics
A submarine dives 196.0 m at an angle of 18.0 ◦ below the horizontal. What is the horizontal component of the submarine’s displacement? Use the coordi- nate system where positive x is to the right and positive y is up. Answer in units of m.
Monday, January 19, 2015 at 12:10pm

physics
A 18 kg block is dragged over a rough, hor- izontal surface by a constant force of 131 N acting at an angle of 27 ◦ above the horizon- tal. The block is displaced 15 . 7 m, and the coefficient of kinetic friction is 0 . 125. The acceleration of gravity is 9 . 8 m / s 2 ....
Monday, January 19, 2015 at 11:55am

Physics/Math
Determine the missing value. a) Output value/Efficiency: 100 J Efficiency: 100% Input E = ??? b) Input: 100 J Efficiency: 30% Output E = ?? Output= 30 J c) Output E: 120 000 J Efficiency: 2% Input E= ?? How would I solve for the put value? Thank you!
Monday, January 19, 2015 at 11:09am

physics
Consider two vectors ~ A and ~ B and their re- sultant ~ A + ~ B . The magnitudes of the vectors ~ A and ~ B are, respectively, 13 . 2 and 6 . 1 and they act at 110 ◦ to each other.Find the magnitude of the resultant vector ~ A + ~ B .
Monday, January 19, 2015 at 10:59am

physics
if resultant of two forces when they act at an angle of 30 deg is 50N and when they act at 60 deg the resultant is 70N find magnitude of two forces
Monday, January 19, 2015 at 9:02am

Physics
A 50 g lunch pail is lifted up 500 m. If the work required to do this was 1450 J, what's the acceleration? W= mad 1450 = (0.05 kg)(a)(500m) 1450 = 250a 5.8 m/s^2 = a If a 750 g mass is accelerated at a rate of 11.0 m/s^2 for a distance of 3.0 m, how much work was done? W...
Sunday, January 18, 2015 at 10:24pm

physics
You're sailboarding at 6.1m/s when a wind gust hits, lasting 6.8s accelerating your board at 0.49m/s2 at a 35∘ to your original direction. 1. Find the magnitude of your displacement during the gust. Express your answer using two significant figures. 2. Find direction...
Sunday, January 18, 2015 at 9:49pm

Physics
A old Chevy accelerates at a rate of 3.8 m/s^2. How much time would it take to reach the speed limit of 100 km if the car was travelling at the speed of 70.0 km? a) 2.9 s b) 3.7 s <---- c) 5.4 s d) 30.0 s 2. Find the acceleration of a skier sliding down a mountain at a rate...
Sunday, January 18, 2015 at 9:29pm

physics
A car, initially going eastward, rounds a 90 ∘ curve and ends up heading southward. If the speedometer reading remains constant, what is the direction of the car's average acceleration vector? Express your answer using three significant figures.
Sunday, January 18, 2015 at 8:11pm

physics
Write an expression for a unit vector at 45∘ clockwise from the x-axis. Express your answer in terms of the unit vectors i^ and j^.
Sunday, January 18, 2015 at 8:11pm

physics
You're sailboarding at 6.1m/s when a wind gust hits, lasting 6.8s accelerating your board at 0.49m/s2 at a 35∘ to your original direction. 1. Find the magnitude of your displacement during the gust. Express your answer using two significant figures. 2. Find direction...
Sunday, January 18, 2015 at 8:10pm

physics
An object is moving in the x-direction at 1.1m/s when it undergoes an acceleration a⃗ =0.56j^m/s2. Find its velocity vector after 4.8s . Express your answer as a comma-separated pair of components. Express your answer using two significant figures
Sunday, January 18, 2015 at 8:09pm

Physics
A cannon is fired at 30 degrees above the horizontal with a velocity of 200 m/s from the edge of a 125 m high cliff. Calculate where the cannonball lands on the level plain below.
Sunday, January 18, 2015 at 6:15pm

Physics
The earth has about 80 times the mass of the earth’s moon. The gravitational force exerted on the moon by the earth has what relation to the gravitational force exerted on the earth by the moon? 1. the same as 2. zero; the earth exerts a force on the moon,but the moon is ...
Sunday, January 18, 2015 at 4:27pm

physics
A block of mass 10kg is pulled horizontally by a force of 75N that makes an angle of 37° to the horizontal whose coefficient of friction is 0.4 . what is the acceleration of the block
Sunday, January 18, 2015 at 2:19pm

physics
A car, initially going eastward, rounds a 90 ∘ curve and ends up heading southward. If the speedometer reading remains constant, what is the direction of the car's average acceleration vector? Express your answer using three significant figures.
Sunday, January 18, 2015 at 12:03pm

physics
Write an expression for a unit vector at 45∘ clockwise from the x-axis. Express your answer in terms of the unit vectors i^ and j^.
Sunday, January 18, 2015 at 12:02pm

physics
A model rocket is launched straight upward. Its altitude y as a function of time is given by y=bt−ct2, where b = 80m/s , c = 4.9m/s2 , t is the time in seconds, and y is in meters. 1. Use differentiation to find a general expression for the rocket's velocity as a ...
Sunday, January 18, 2015 at 11:57am

Physics II
A large cylindrical water tank 11.5 m in diameter and 13.5 m tall is supported 8.75 m above the ground by a stand. The water level in the tank is 10.6 m deep. The density of the water in the tank is 1.00 g/cm3. A very small hole is formed at the base of the vertical wall of ...
Sunday, January 18, 2015 at 9:05am

Physics
An automobile travels a distance of 12 km in 4 minutes. It then moves the next 12 km in 2 minutes. Please help me to calculate its acceleration which is constant throughout the motion. Thanks in advance ))))
Sunday, January 18, 2015 at 8:55am

Physics
the coefficient of friction between block A and the horizontal surface is 0.43. What must be the weight of teh hanging block B if this block is to descend at constant speed once it has been set into motion? Mass of block A is 5.0 kg
Sunday, January 18, 2015 at 8:48am

physics
As a warm-up for their juggling act, two clowns are tossing balls straight up in the air and catching them. While following the balls with his eyes, Joey says, ”Isn’t it strange how they just stand still in the air for a moment before they fall back down?” ”...
Sunday, January 18, 2015 at 2:02am

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 ...
Saturday, January 17, 2015 at 9:53pm

physics
Mass M is initially sliding down the inclined plane with a velocity of V = 4 cm/sec as shown. The coefficient of kinetic friction is μK = 0.2. Angle of 70 degrees. Assuming the mass does not reach the base of the incline before one second has passed, answer the following...
Saturday, January 17, 2015 at 9:53pm

Science
guys, please give me any ideas for a investigatory project in physics ???
Saturday, January 17, 2015 at 9:14pm

Chemistry
Can someone please tell me what to expect from Beginner High School chemistry? Is it mostly applying mathematics like physics? Or basically memorizing like biology? Thank you!
Saturday, January 17, 2015 at 9:12pm

Physics
A car accelerates at a rate of 5m/s2 for a period of 4.2 seconds and then moves at a constant speed for 8 seconds more. How far did it travel?
Saturday, January 17, 2015 at 8:21pm

Calc Physics
The velocity as a function of time for an asteroid in the asteroid belt is given by v(t)= vo e^(-t/to)i + (vo t/ 2 to) j with vo and to constants. Use ti = 0 as the initial time, and tf = 472 s as the final time. The values for the constants that you will use are: vo = 9 m/s ...
Saturday, January 17, 2015 at 6:52pm

physics
Wayne exerts a force of 70.9 N to pull a 409 N sled along a snowy path using a rope that makes a 48◦ angle with the ground. The sled moves 19.9 m in 4.3 s. What is Wayne’s power? Answer in units of W. PLEASE HELP!
Saturday, January 17, 2015 at 6:49pm

physics
Wayne exerts a force of 70 . 9 N to pull a 409 N sled along a snowy path using a rope that makes a 48 ◦ angle with the ground. The sled moves 19 . 9 m in 4 . 3 s. What is Wayne’s power? Answer in units of W.
Saturday, January 17, 2015 at 6:18pm

physics
Samantha is 1.21 m tall on her eleventh birthday and 1.32 m tall on her twelfth birthday. By what factor has her height increased?
Saturday, January 17, 2015 at 5:00pm

Physics
Two point charges q1 and q2 are held 4.00cm apart. An electron released at a point that is equidistant from both charges undergoes an initial acceleration of 9.00×10^18m/s^2 directly upward in the figure, parallel to the line connecting q1 and q2. See the figure: session...
Saturday, January 17, 2015 at 3:54pm

physics
Please someone should help me with this. An elastic material has a length of 36cm when a load of 40N is hung on it and a length of 45cm when a load of 60N is hung on it. The original length of the string is ?
Friday, January 16, 2015 at 5:50pm

Physics Class
A 0.140-kg baseball is pitched horizontally at 36.7 m/s. When a player hits the ball, it moves at the same speed, but in the opposite direction. If the bat and the ball are in contact for 0.450 ms, calculate the average force the bat exerts on the ball. Work Shown: F/\t0.450ms...
Friday, January 16, 2015 at 3:37pm

Physics
A boat crosses a river of width 115 m in which the current has a uniform speed of 1.84 m/s. The pilot maintains a bearing (i.e., the direction in which the boat points) perpendicular to the river and a throttle setting to give a constant speed of 1.1 m/s relative to the water...
Friday, January 16, 2015 at 12:23pm

Math/physics
This is my last problem. Please help! A motorcycle rider starts out on top of a ramp 10 m high and then rides down and jumps the motorcycle when he comes to the end of the ramp (like evil knivel). The rider is at the peak of his jump at 5 m. How fast is the motorcycle going ...
Friday, January 16, 2015 at 9:16am

physics
Please how do i solve this? A body of mass 36kg falls through a viscous liquid which offers a drag of 260N on the body. The upthrust on the body at terminal velocity is?
Friday, January 16, 2015 at 5:45am

physics
the brakes of a car provide an acceleration of -5.0 m/s^2 . how long will it take for a car traveling at 20.0 m/s to stop ?
Friday, January 16, 2015 at 1:29am

physics
A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 89.0 kg, the mass of the skateboard is 4.10 kg, and the mass of the brick is 2.50 kg. If the person throws the brick forward (in the direction ...
Thursday, January 15, 2015 at 11:17pm

Physics
A boy is trapped in a large area of very soft mud. A man rescues the boy by crawling across a long, light board rather than by walking into the mud. What effect, if any does the board have on the force and the pressure on the mud, compared with walking? A. force and pressure ...
Thursday, January 15, 2015 at 10:46pm

Physics
A 500 kg car experiences a frictional force of 3208 N while turning, if the car is traveling around a turn of radius 16 m what is the velocity of the car?
Thursday, January 15, 2015 at 8:44pm

Physics
A car driving at 99m/s can stop in 83 m. What is the smallest radius the car can safely travel at the original velocity?
Thursday, January 15, 2015 at 8:44pm

physics
A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 87.0 kg, the mass of the skateboard is 4.10 kg, and the mass of the brick is 2.50 kg. If the person throws the brick forward (in the direction ...
Thursday, January 15, 2015 at 8:41pm

physics
Thermal energy is caused by motion of? 1. mixing water molecules contained in a beaker 2. molecules in soild liquid and gas phases 3. mixing molecules together 4. molecules that have reached equilibrium the density of an object with the volume of 60.0 mL and a mass f 400.0 g ...
Thursday, January 15, 2015 at 6:59pm

physics
A ball is thrown straight up and reaches a maximum height of 6.57 m . What was its initial speed? The accelera- tion of gravity is 9.8 m/s2 . Answer in units of m/s
Thursday, January 15, 2015 at 6:07pm

physics
A 25.7 kg mass attached to a spring scale rests on a smooth, horizontal surface. The spring scale, attached to the front end of a boxcar, reads T = 47.6 N when the car is in motion. If the spring scale reads zero when the car is at rest, determine the acceleration of the car, ...
Thursday, January 15, 2015 at 6:02pm

Physics
A bicycle and rider travel along a road. Which of the following statements is true? Neither the bicycle nor the rider undergoes a translation. Only the bicycle undergoes a translation. The bicycle wheels rotate and translate the entire bike and the rider. Only the bicycle ...
Thursday, January 15, 2015 at 3:14pm

Physics
A car driving at 93m/s can stop in 75 m. What is the smallest radius the car can safely travel at the original velocity?
Thursday, January 15, 2015 at 1:51pm

Physics
A penny is placed on a disk that is rotating at 2 revolutions per second. The coefficient of friction between the penny and the disk is 0.4. What is the maximum radius at which the penny will stay on the disk? a. 2.5cm b. 100cm c. 1cm d. 10cm e. 25cm
Thursday, January 15, 2015 at 1:48pm

Physics
A 200kg car is traveling at 50m/s on a level, circular track with radius 100m. What is the traction force required to keep the car on the track? a. 25000N b. 50,000N c. 10000N d. 2500N e. 5000N
Thursday, January 15, 2015 at 1:46pm

Physics (is my work correct????)
A tension force of 2.50 N acts horizontally on a 2.00 kg block. The block accelerates at 0.750 m/s2. What is the force of kinetic friction? 2 x .75, = 1.5N (2.5 - 1.5) = 1N?????
Thursday, January 15, 2015 at 12:51pm

Physics- Can you check my answer PLEASSE
The velocity of an object increases from 5.0 m/s to 15 m/s in 2.0 s. What is the average acceleration of the object? 15m/s - 5m/s = 10m/s 10m/s / 2.0s = 5 m/s <----
Thursday, January 15, 2015 at 12:37pm

mathematics,science,physics,agriculture and geograph.
which work i surpose to do?caus geograph confuse me!
Thursday, January 15, 2015 at 10:05am

PHYSICS
The driver of a car traveling at 25.0 m/s applies the brakes and undergoes a constant negative acceleration of magnitude 2.50 m/s2. How many revolutions does each tire make before the car comes to a stop, assuming that the car does not skid and that the tires have radii of 0....
Thursday, January 15, 2015 at 9:43am

physics
a rotating disc of mass 'm', radius 'r', thickness 'D' can rotate in vacuum with constant angular velocity 'w' . now the disc is placed in water of density 'p', find the time in which its angular velocity becomes half.
Thursday, January 15, 2015 at 6:35am

Physics
Chisel is a pivot point between the wire and a 2 cm distance between the pins and the hand is 10 cm F 50 Newton force How much is the mechanical advantage? How much is the forces acting on the wire?
Thursday, January 15, 2015 at 6:07am

Physics
An outfielder throws a baseball to home plate with a velocity of +15 m/s and an angle of 30°. When will the ball reach its highest altitude? (Points : 3) 1.2 s 1.5 s 0.77 s 0.50 s
Thursday, January 15, 2015 at 3:51am

physics
Two geological field teams are working in a remote area. A global positioning system (GPS) tracker at their base camp shows the location of the first team as 43 km away, 23° north of west, and the second team as 29 km away, 33° east of north. When the first team uses ...
Thursday, January 15, 2015 at 3:27am

physics
A box of mass 10 kg is pushed across the floor with a force of 25 N. A 2 N frictional force opposes the motion. What is the acceleration of the box?
Thursday, January 15, 2015 at 1:07am

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