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February 9, 2016

Homework Help: Science: Physics

Recent Homework Questions About Physics

Physics
A car is traveling North. In which direction are the wheels turning. This is under the torque chapter
Saturday, October 24, 2015 by daniel

AP Physics
A ball is kicked 30º above the horizontal with an initial velocity of 20m/s. A fence 2.3 meters high is located 32 meters away. a. How long does it take to reach the fence? b. Does it goes over the fence? Does it hit the ground before? By how much? I believe I have to ...
Saturday, October 24, 2015 by Jessica

physics
Calvin is pulling Hobbes on his sled with a force of 45 N [30o above the ground]. The mass of Hobbes and the sled is 18 kg and the coefficient of friction between the sled and the ground is 0.25. Determine a) the net force in the vertical. in this case is the net force going ...
Saturday, October 24, 2015 by Natasha

physics
projectile l (height) l (canon's velocity>) /--------------------l (distance) I did a mock of the picture provided. Here it is showing a cannon shooting a banana to the monkey on top of a tree. It gives you no numbers. Question: Derive a general equation for the time of...
Saturday, October 24, 2015 by LoveShack

Physics
A puck of mass 0.03 kg slides across rough ice, experiencing a frictional force of 0.2 N. If it was moving at 36 m/s when I hit the ice patch, A) How long did it take to stop? B) What was the length of the ice patch? I know I have initial velocity, mass and final velocity of ...
Saturday, October 24, 2015 by Cali

physics
A body of mass 0.4kg moving with constant speed of 10m/s to north is subjected to a constant force of 8 N directed towards the south for 30s. Take the instant the force is applied to be t=0, the position of the body at that time to be x=0 and t =-5s and t=-25s
Saturday, October 24, 2015 by jeet mali

PHYSICS
An automobile accident causes both the driver and passenger front airbags to deploy. a. If the vehicle travelled at a speed of 88.6 km/h is now at rest, find the change in momentum for both the 68.4 kg adult driver and the 34.2 kg child passenger. b. The adult took 0.564 s and...
Saturday, October 24, 2015 by CHARLES

physics
An astronaut on the Moon throws a stone from the top of a cliff. The stone hits the ground below 21.0 seconds later. The acceleration due to gravity on the moon is 1.6 ms–2. what is the initial vertical velocity?
Saturday, October 24, 2015 by mark

Physics!!!!222
2. A 75.0-kg painter climbs a ladder that is 2.75 m long leaning against a vertical wall. The ladder makes a 30.0° angle with the wall. (a) How much work does is done by gravity on the painter? (b) Does the answer to part (a) depend on whether the painter climbs at ...
Saturday, October 24, 2015 by Anonymous

Physics!!!!
3. You push your physics book 1.50 m along a horizontal table- top with a horizontal push of 2.40 N while the opposing force of friction is 0.600 N. How much work does each of the following forces do on the book: (a) your 2.40-N push, (b) the friction force, (c) the normal ...
Saturday, October 24, 2015 by Anonymous

Physics
2. A 75.0-kg painter climbs a ladder that is 2.75 m long leaning against a vertical wall. The ladder makes a 30.0° angle with the wall. (a) How much work does is done by gravity on the painter? (b) Does the answer to part (a) depend on whether the painter climbs at ...
Saturday, October 24, 2015 by Anonymous

Physics
1. A student librarian picks up a 2.2 kg book from the floor to a height of 1.0 m. He carries the book 5.3 m to the shelves and places the book on a shelf that is 0.65 m above the floor. How much work does he do on the book?
Saturday, October 24, 2015 by Anonymous

Physics
what is the total displacement of a runner which finish the 1-km race in just 10 seconds
Saturday, October 24, 2015 by Lester

physics
You have two cylindrical solenoids, one inside the other, with the two cylinders concentric. The outer solenoid has length ℓouter = 400 mm, radius R outer = 50 mm, and N outer = 2000 windings. The inner solenoid has length ℓinner = 40 mm, radius R inner = 20 mm, ...
Saturday, October 24, 2015 by alexw

physics
1. Calvin is pulling Hobbes on his sled with a force of 45 N [30o above the ground]. The mass of Hobbes and the sled is 18 kg and the coefficient of friction between the sled and the ground is 0.25. Determine a) the net force in the vertical. in this case is the net force ...
Friday, October 23, 2015 by Natasha

Physics
A railroad freight car with a mass of 50,000 kg is rolling along a level track at 0.30 m/s. A rope trails behind it. If the maximum force you could apply to stop the cart is 250 N, what is the shortest amount of time (measured in seconds) it would take for you to bring it to ...
Friday, October 23, 2015 by Alice

Physics
A spring that has a spring constant of 150 N/m is oriented vertically with one end on the ground. (a) What distance does the spring compress when a 4-kg object is placed on its upper end? in m. (b) By how much does the potential energy of the spring increase during the ...
Friday, October 23, 2015 by Alyssa

Please Help with Physics ASAP!!
Okay, so I totally don't understand what to do with these three. Could you please show how to solve? I don't need to see the solution, just what steps I need to take for each (every smallest detail please). 1. A box weighing 150 N is at rest on a horizontal floor. The ...
Friday, October 23, 2015 by Anonymous

Physics
A ball is thrown vertically and reaches a height of 25m. What was it's initial velocity?
Friday, October 23, 2015 by Haley

Physics
A ball is released and allowed to fall freely. How far will it have fallen in 2 seconds?
Friday, October 23, 2015 by Haley

Physics
A ball is thrown vertically into the air with a velocity of 10ms to the negative 1 power. What will its displacement be after 1.5 seconds?
Friday, October 23, 2015 by Haley

Physical Science-Physics
You need to pick up a book off the floor and place it on a table top that is 0.78 m above ground. You expend 1.56 J of energy to lift the book. The book has an acceleration of 1.54 m/s squared. What is the book's mass?
Friday, October 23, 2015 by Gracie

College Physics
A student throws a 140 g snowball at 7.5 m/s at the side of the schoolhouse, where it hits and sticks. What is the magnitude of the average force on the wall if the duration of the collision is 0.19 s ?
Friday, October 23, 2015 by Anonymous

Physics
How much work is done by a 45-N force acting 35 degrees above the horizontal in pulling a block 9 m across a horizontal surface?
Friday, October 23, 2015 by Abbie

Physics
Find the work necessary to run a football (1 lb) from the 2-m mark to the 52-m mark.
Friday, October 23, 2015 by Mirania

physics -plz help
1) A car is moving at 100 km/hr. Its mass is 950 kg. Find its KE. 2) What force is needed to accelerate a 1300-kg car from rest to 20 m/s in 80 m? 3) A 1200-kg car going 30 m/s skids to rest. The friction force is 6000 N. How far does it skid?
Friday, October 23, 2015 by Salmon24

Physics
I need help with these two. 1. A horizontal force pulls a 20-kg box across the floor with constant speed. μs is 0.60, how much work does F do in moving the cart 3.0 m? 2. A 400 lb load of bricks is to be lifted to the top of a scaffold 30 feet high. How much work to lift ...
Friday, October 23, 2015 by Yurii

physics
The chimney of a stationary toy train consists of a vertical spring gun that shoots steel balls a meter or so straight into the air – so straight that the ball always falls back into the chimney. If the train is moving, under which condition will the ball fall back into ...
Friday, October 23, 2015 by Annonymous

physics
A 38 kg penguin is sliding across a patch of ice, starting at 13 m/s. If the coefficient of friction is .12, how far will the penguin slide before incomes to a halt.
Friday, October 23, 2015 by marie

physics
The chimney of a stationary toy train consists of a vertical spring gun that shoots steel balls a meter or so straight into the air – so straight that the ball always falls back into the chimney. If the train is moving, under which condition will the ball fall back into ...
Friday, October 23, 2015 by Annonymous

physics
a train is moving at 30m/s when the brakes are applied the retardation is 2m/s (square). find the velocity after 10sec and the time taken for the tree to come to rest
Friday, October 23, 2015 by abiee

physics
a train is moving at 30m/s when the brakes are applied the retardation is 2m/s (square). Find the velocity after 10sec and the time taken for train to come to rest
Friday, October 23, 2015 by abiee

physics
There is a car turning on an unbanked road. The mass of the car is 2000kg moving at constant speed 36mph. The radius of the unbanked curve is 100m. the driver sees an obstacle at 20m ahead along the curve. he presses the brakes and expects to have a constant deceleration along...
Friday, October 23, 2015 by daniel

Calrary science secondly school taraku
Physics.p: a stone whirled at the end of a rope 30cm long makes 10 complete in 2seconds find the angular velocity the lnear speed the distance covered in 5seconds
Friday, October 23, 2015 by Tsavgbir moses

Physics
A person is trying to judge whether a picture (mass = 2.37 kg) is properly positioned by temporarily pressing it against a wall. The pressing force is perpendicular to the wall. The coefficient of static friction between the picture and the wall is 0.760. What is the minimum ...
Thursday, October 22, 2015 by Hannah

Physics
A wet bar of soap slides down a ramp 9.4 m long inclined at 8.0∘ . How long does it take to reach the bottom? Assume μk = 0.064.
Thursday, October 22, 2015 by catherine

Physics
A rocket blasts off from rest and attains a speed of 53.8 m/s in 17.4 s. An astronaut has a mass of 67.2 kg. What is the astronaut's apparent weight during takeoff?
Thursday, October 22, 2015 by Hannah

PHYSICS
How much heat energy is required to change 40g of ice at -10K to water at 70K? [Specific heat of ice=2100J/KgK Specific heat of water 4200J/KgK]
Thursday, October 22, 2015 by HEJUMACLA

Physics
A child in a boat throws a 5.90-kg package out horizontally with a speed of 10.0 m/s. The mass of the child is 26.6 kg and the mass of the boat is 38.2 kg . Calculate the velocity of the boat immediately after, assuming it was initially at rest.
Thursday, October 22, 2015 by Anon

Physics
A 4.36 kg block free to move on a horizontal, frictionless surface is attached to one end of a light horizontal spring. The other end of the spring is fixed. The spring is compressed 0.144 m from equilibrium and is then released. The speed of the block is 1.18 m/s when it ...
Thursday, October 22, 2015 by Alex

Physics
A car is travelling at 2 0m/s when it pulls out to pass a truck that is travelling at only 18 m/s the car accelerates at 2 m/s square for 4 sec and then maintains this new velocity. if the car was originally 8 mtrs behind the truck when it pulled out to pass , how far in front...
Thursday, October 22, 2015 by Neeraj

physics
A circular wire is connected to a galvanometer. A solenoid is placed inside the circular wire. The solenoid has 520 turns per meter, a cross-sectional area of 0.007 m^2 and a current charge from 0A to 0.7A in 1.25 ms. The circular wire has a n are of 0.01m^2 and a resistance ...
Thursday, October 22, 2015 by carolyn

physics
A person walks 28.8 degrees north of east for 2.06 km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk? Answer in units of km work: 2.06sin28.8??? Don't know where to go
Thursday, October 22, 2015 by Anonymous

Physics
what quantities are needed to describe motion -is it to know how position changes with time what are 2 pictorial methods to describe motions??
Thursday, October 22, 2015 by anonymous

physics eq check
just wanted to know if this is a correct substitution, we are given kinetic energy, and want the debroglie wavelength, that eq is lamba = h / p. = h/ mv Momentum in terms of KE: 1/2 m (p/m)^2 1/2 m p^2/m^2 KE = p^2/2m so... mv can be substituted as squareroot (2*m*KE) in the h...
Thursday, October 22, 2015 by paul

Physics
The mass of a beetle is 0.000004kg. If a beetle's center of mass rises 0.75 mm while it is pushing against the floor and then continues to travel up to a height of 250 mm above the floor, what is the magnitude of the force exerted by the floor on the beetle?
Thursday, October 22, 2015 by Tyler

Physics
what quantities are needed to describe motion -to know how position changes with time
Thursday, October 22, 2015 by anonymous

Science/physics
Two vectors A and B have magnitude A = 3.00 and B = 3.00. Their vector product is A x B= -5.00k + 2.00i. What is the angle between A and B? According to the answer, the angle is 37 degrees. I see where this comes from. However, we know that sin(36,75)=sin(143,25) So the ...
Thursday, October 22, 2015 by Tarrok

Intellectual Academy
Pls show me the steps how to work this physics question:A pulley system of 4 pulleys is used to raise a loan of mass 50kg vertically,if its effeciency is 80%,determine the minimum effort required to raise the load(g=10ms-2)?
Thursday, October 22, 2015 by Joy

Physics
Two blocks with masses m1 = 24.3 kg and m2 = 66.9 kg, shown in the figure, are free to move. The coefficient of static friction between the blocks is 0.34 but the surface beneath m2 is frictionless. What is the minimum force F required to hold m1 against m2
Thursday, October 22, 2015 by Phil

physics
A car of mass 1000 kg is on an icy driveway inclined at an angle of 33◦. The acceleration of gravity is 9.8 m/s^2 θ If the incline is frictionless, what is the acceleration of the car?
Thursday, October 22, 2015 by Annonymous

physics
a stone tied to a strong is made to revolve in a horizontal circle of radius 4 m with an angular speed of 2 radian per second. with what tangential velocity will the stone move off the circle if the string cuts?
Thursday, October 22, 2015 by Moses

Physics
victoria falls is about 108 m high, and sometimes as much as 550,000,000 m3 of water rushes over the edge each minute. what is the waterfalls total power? use a density of water of 1000 kg/m3.
Thursday, October 22, 2015 by Hillary

physics
prove 1/2kt=3/2 iw^2 or 1/2kt=3/2 (rotational k.e)
Thursday, October 22, 2015 by abdulmueed

Physics URGENT
Object 1 (mass=6.4 kg) traveling in the +x direction at a speed of 14.01m/s undergoes an inelastic collision with Object 2 (mass=5.10kg) which is at rest. Object two flies off at a speed of 11.94m/s and an angle θ2=49.8 °. The diagram below is just a sketch and is not...
Thursday, October 22, 2015 by Nick URGENT

physics
Two students are on a balcony that is 15 m above the ground. One student throws a ball vertically downward with an initial velocity of 12 m/s. Another student throws a ball upward at the same time with exactly the same speed. Both Balls eventually hit the ground below the ...
Thursday, October 22, 2015 by Kiki

physics
Some nucleus of 74X189 (atomic mass = 188.96191 u) undergoes - decay to become 75X189 (atomic mass = 188.95922 u). What is the energy (in MeV) released in this process?
Thursday, October 22, 2015 by james

physics
The number of radioactive nuclei present at the start of an experiment is 3.27 x 1015. The number present twenty days later is 7.66 x 1014. What is the half-life (in days) of the nuclei?
Thursday, October 22, 2015 by james

physics is this correct
What is the radius of a real or imaginary nucleus of 46X100 do I use the formula R = R_o * A^(1/3) and therefore (1.3*10^-15)* 100^(1/3) =6.0340655e-15?
Thursday, October 22, 2015 by james

physics
The refractive indices of materials A and B have a ratio of nA/nB = 1.68. The speed of light in material A is 1.26 x 108 m/s. What is the speed of light in material B
Thursday, October 22, 2015 by james

physics
An object is located 27.6 cm to the left of a converging lens whose focal length is 46.5 cm. (a) Determine the image distance and (b) the magnification.
Thursday, October 22, 2015 by james

PHYSICS NEED HELP
A bicyclist can coast down a 5° hill at a constant 6.0 km/h. Assume the force of friction (air resistance) is proportional to the speed v so that Ffr = cv. (a) Calculate the value of the constant c. (b) What is the average force that must be applied in order to descend the...
Thursday, October 22, 2015 by Manny

Physics
Carlos is in an roof of a building of 20 meters tall, he throws a tennis ball vertically upwards at 15 m/s velocity after it reaches its highest height, the ball goes down until it reaches the ground (see the figure). Based on this information, answer the following. a) Time ...
Thursday, October 22, 2015 by Anonymous

Physics
Mary throws a ball from her balcony downwards as it is shown in the figure. How long does it take to reach the ground? What is the balcony height?
Thursday, October 22, 2015 by Anonymous

physics
A tennis player standing 13.9 m from the net hits the ball at 3.40° above the horizontal. To clear the net, the ball must rise at least 0.449 m. If the ball just clears the net at the apex of its trajectory, how fast was the ball moving when it left the racquet?
Wednesday, October 21, 2015 by Anonymous

Physics
Carlos is in an roof of a building of 20 meters tall, he throws a tennis ball vertically upwards at 15 m/s velocity after it reaches its highest height, the ball goes down until it reaches the ground (see the figure). Based on this information, answer the following. a) Time ...
Wednesday, October 21, 2015 by Flores

physics
Juan was on vacation in Italy, and one of this adventures, he went up the Pisa tower. He wants to know the tower height using Physics, so he drops a small stone that he has in his pocket and takes the time it lasts to reach the ground. What is the Pisa tower height according ...
Wednesday, October 21, 2015 by Flores

Physics
The following conversion equivalents are given 1m=100th 1in=2,5th 1ft=12th A bin has a volume of 1.5 to the 3rd power. The volume of the bin, in ft to the 3rd power, is closet to
Wednesday, October 21, 2015 by Neaka

PHYSICS
A salesperson leaves the office and drives 26 km north along a straight highway. A turn is made onto a highway that leads in a direction of 60 degrees. The driver continues on the highway for a distance of 62 km and then stops. What is the total displacement of the salesperson...
Wednesday, October 21, 2015 by Madison

physics
During lab students are asked to set up the Atwood's device shown in the diagram below. Mass 1 = 4.50 kg and mass 2 = 2.10 kg. If the distance to the floor, S = 1.20 meters, how much time is needed for mass 1 to reach the floor? please explain how to do this; i dont know how
Wednesday, October 21, 2015 by anon

physics
In the Atwood machine shown in Figure 5.14a, m1 = 2.00 kg and m2 = 8.00 kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is released with a sharp push that sets it into ...
Wednesday, October 21, 2015 by Janice

Physics- PLEASE HELP!!
Add together these vectors: V1= 60 Newtons at 45 degrees N of W; V2= 5Newtons at 30 degrees S of E Is it 62.25N@40.50 S of E??
Wednesday, October 21, 2015 by Hannah

physics
A salesperson leaves the office and drives 26 km north along a straight highway. A turn is made onto a highway that leads in a direction of 60 degrees. The driver continues on the highway for a distance of 62 km and then stops. What is the total displacement of the salesperson...
Wednesday, October 21, 2015 by Sooners41

Quick physics check
Add together these vectors: V1= 60 Newtons at 45 degrees N of W; V2= 5Newtons at 30 degrees S of E Is it 62.25N@40.50 S of E??
Wednesday, October 21, 2015 by Hannah

Physics
If a ball has a weight of 6.8N what is the centripetal force of the string
Wednesday, October 21, 2015 by Student

Physics
A bullet of mass 15 g is fired with an initial speed of 287 m/s into a wooden block that is initially at rest. The bullet becomes lodged in the block, and the bullet and block then slide together on the floor for a distance of 1.4 m before coming to rest .If the coefficient of...
Wednesday, October 21, 2015 by Wrenn

Physics
A 100 grams of bullet is fired from a 10 kg with a speed of 1000 m/s. What is the speed of the recoil of the gun?
Wednesday, October 21, 2015 by Anonymous

Physics
You know you should not have bought the "MRI in a Box" kit from the Home Shopping Channel. Its main solenoid is supposed to have a radius of r=0.28 m, a length of L=0.1 m, and 12000 windings. The wire they give you has a resistance of 13 mΩ per meter. With only...
Wednesday, October 21, 2015 by Anonymous

Physics
From what height would a car weighing 9990 N have to fall to gain the kinetic energy equivalent to what it would have when traveling 64.87 mi/hr?
Wednesday, October 21, 2015 by Julia

Physics
A car is stationary at a stop sign when it is hit directly from behind by a truck of mass 3000kg which was travelling at a speed of 9 m/s immediately before the collision. The two vehicles lock together and move forward with an initial speed of 6 m/s. a) what is the mass of ...
Wednesday, October 21, 2015 by Dani

Physics
A car is stationary at a stop sign when it is hit directly from behind by a truck of mass 3000kg which was travelling at a speed of 9 m/s immediately before the collision. The two vehicles lock together and move forward with an initial speed of 6 m/s. a) what is the mass of ...
Wednesday, October 21, 2015 by Dani

Physics
How much energy is released when 250 kg of anthracite coal burns
Wednesday, October 21, 2015 by Alikhan

Physics
a body of mass m hung in a particular spring execute shm if period 1seconds What period would be obtained? a,using a body of mass 4m?
Wednesday, October 21, 2015 by Eryk

physics formula check please
A mirror produces an image that is located 28.0 cm behind the mirror, when the object is located 9.90 cm in front of the mirror. (a) What is the focal length of the mirror? (b) Is the mirror 1 - concave or 2 - convex? (Give the number of the correct answer.) The refractive ...
Wednesday, October 21, 2015 by james

Physics please help
An object that is 31 cm in front of a convex mirror has an image located 16 cm behind the mirror. How far behind the mirror is the image located when the object is 24 cm in front of the mirror? do I use the formula 1/f = 1/di + 1/do?? please help
Wednesday, October 21, 2015 by james

Physics
What is electric potential
Wednesday, October 21, 2015 by Eryk

Physics
"Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fires the unit, and accelerates straight upward. At a height of 16 m, his speed is 5.0 m/s. His mass, including the propulsion unit, has the approximately constant value of ...
Wednesday, October 21, 2015 by Kristen

physics
A 66 kg man's arm, including the hand, can be modeled as a 78-cm-long uniform cylinder with a mass of 3.6 kg . In raising both his arms, from hanging down to straight up, by how much does he raise his center of gravity?
Tuesday, October 20, 2015 by Anonymous

physics
what is the molar specific pressure at constant volume
Tuesday, October 20, 2015 by akin

physics 11
A swimmer swims perpendicular to the bank of a 20.0 m wide river at a velocity of 1.3 m/s. Suppose the river has a current of 2.7 m/s [W]. (a) How long does it take the swimmer to reach the other shore? (b) How far downstream does the swimmer land from his intended location?
Tuesday, October 20, 2015 by eric

Physics help
A plane flies 230 mph at 60 degrees north of west for 2.5 hours. Answer the following questions. A. How far did it travel total? B. How far west did it go? C. How far north did it go? D. How fast did it go west? I don't know how to do this problem :(
Tuesday, October 20, 2015 by Hannah

Physics
Two particles are fixed to an x axis: particle 1 of charge q1 = 1.73 ¡Ñ 10-8 C at x = 30.0 cm and particle 2 of charge q2 = -4.41q1 at x = 78.0 cm. At what coordinate on the x axis is the electric field produced by the particles equal to zero?
Tuesday, October 20, 2015 by Anonymous

physics
A truck loaded with sand accelerates along a highway. The driving force on the truck remains constant. What happens to the acceleration of the truck as its trailer leaks sand at a constant rate through a hole in its bottom?
Tuesday, October 20, 2015 by mo

Physics (A-level)
A ball was projected horizontally at a speed of 0.52 m s–1 across the top of an inclined board of width 600 mm and length 1200 mm. It reached the bottom of the board 0.9 s later (Figure 4). Calculate: a the distance travelled by the ball across the board, b its ...
Tuesday, October 20, 2015 by Jeffrey Jones

physics
If the rope pulling on the leg exerts a 120-N force on it, how massive should be the block hanging from the rope that passes over the pulley?
Tuesday, October 20, 2015 by thissa

Physics
Help!?!?! A pontoon boat starts from rest and accelerates at a constant rate of 0.25m/s^2 over a displacement of 290 meters. 1. Find the magnitude of the boats final velocity? 2. Find the time it takes the boat to travel this displacement.
Tuesday, October 20, 2015 by Mike

PHYsics URGENT
a 7.0 kg object weighs 55 N when submerged and weighed in water. A) what is the value of the buoyant force of the water on the object b) what weight of water is displaced by this object? c) water weighs 0.0098 N per cubic centimeter. What volume of water (in cubic centimeters...
Tuesday, October 20, 2015 by sammie

College Physics
A 1670 kg car rolling on a horizontal surface has a speed of 80 km/hr when it strikes a horizontal coiled spring and is brought to rest in a distance of 6.5 m. What is the spring constant (in N/m) of the spring? (Ignore nonconservative forces such as friction.) Now I've ...
Tuesday, October 20, 2015 by Keya

Physics
A 400.0 KG mass experiences a horizontal push force of +720N And friction force of 320N A) assuming the mass is initially moving at 5.0 m/s far will it travel in 6.0 s? B) how much work does the 720.0 newton force do over the distance determine in part a? C) calculate the ...
Tuesday, October 20, 2015 by Anonymous

Physics
A 400.0 KG mass experiences a horizontal push force of +720N And friction force of 320N A) assuming the mass is initially moving at 5.0 m/s far will it travel in 6.0 s? B) how much work does the 720.0 newton force do over the distance determine in part a? C) calculate the ...
Tuesday, October 20, 2015 by Anonymous

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