Saturday

February 6, 2016
**physics**

A spelunker is surveying a cave. She follows a passage 120 m straight west, then 210 m in a direction 45∘ east of south, and then 280 m at 30∘ east of north. After a fourth unmeasured displacement, she finds herself back where she started. A. Use a scale drawing to...
*Saturday, January 9, 2016 by mohamed*

**physics**

a. A stone is dropped at t = 0 s. A second stone, with a mass 2.0 times that of the first, is dropped from the same point at t = 0.25 s. How far from the release point is the center of mass of the two stones at t = 0.52 s? Assume that neither stone has yet reached the ground. ...
*Saturday, January 9, 2016 by shila*

**physics**

a. A power plant burns coal and generates an average of 610.0 Megawatts (MW) of electrical power while discharging 915.00 MW as waste heat. Find the total electrical energy generated by the plant in a 30-day period. b. Coals vary a lot in their energy content. The energy ...
*Saturday, January 9, 2016 by shila*

**Physics**

A ladder ABC of length 20m is leaning against a wall at an angle from the horizontal. There is a roller at the top of the ladder that rests against the vertical wall. The coefficient of friction between the ladder and the horizontal surface at A is 0.5. Determine: (a) the ...
*Saturday, January 9, 2016 by Lisa *

**physics dimension**

write down the dimensions of moment of inertia and surface tension coefficient.
*Saturday, January 9, 2016 by yaro*

**physics dimension**

in a gas equation (p+a/v^2)(v-b)=RT determine the dimension of the constant a and b;R being the gas constant, v is volume,p is pressure and T is temperature
*Saturday, January 9, 2016 by yaro*

**Physics **

A long thin rod lies along the x-axis from the origin to x=L, with L= 0.750 m. The mass per unit length, λ (in kg/m) varies according to the equation λ = λ0 (1+1.410x3). The value of λ0 is 0.600 kg/m and x is in meters. 1) Calculate the total mass of the ...
*Saturday, January 9, 2016 by David*

**physics dimension **

if the gravitational force F is given by F=GM1M2/r^2 derive the dimension of the constant G.
*Saturday, January 9, 2016 by yaro*

**physics**

The sement bag has a mass of 50 kg an the small pulley has a mass of 2kg ,if the cement bag pulled upwards with an acceleration of 2m/s.fin the force pulling the rope
*Saturday, January 9, 2016 by nurjamal*

**physics**

a particl rotating disc of radius 2m has a constant speed 16m/s.what is size of angular velocity of disc?
*Saturday, January 9, 2016 by Anonymous*

**Physics**

A man can swim at a speed of 3km/hr in still water. He wants to cross a 500m wide river flowing at 2km/hr. He keeps himself always at an angle of 120¡ãwith the water flow while swimming. Find (A) The time he takes to cross the river (B) The point on the opposite ...
*Saturday, January 9, 2016 by Apurv*

**Physics with Calculus**

qsub1:-2.8uC qsub2: 6.6uC qsub2 sits 7.9 cm away from qsub2, and in a previous question moved up the y axis 2.7cm. The question that I am having difficulty with has added qsub3 in the middle of of qsub1 and qsub2, changing the magnitude of Fsub2net= 7.954. What is the sign and...
*Saturday, January 9, 2016 by Jessica*

**Physics**

Charges q1 and q2 lie on the x-axis at points x= -a and x= +a respectively a) how must must q1 and q2 be related for the net force +Q placed at x= +a/2 to be zero?
*Saturday, January 9, 2016 by Ibrahim*

**physics dimention**

the force of capillarity in plant is given by F=yrgh/2,where y is the coefficient of surface tension.Is this equation correct or not? justify your answer.
*Friday, January 8, 2016 by yaro*

**physics dimensions**

the displacement of a particles is given by S=A+Bt+Ct^2.deduce the values of the constant A,B,and C appearing in the equation
*Friday, January 8, 2016 by Anonymous*

**Physics**

The rear window in a car is approximately a rectangle, 1.31 m wide and 0.390 m high. The inside rear-view mirror is 0.440 m from the driver's eyes, and 1.42 m from the rear window. What is the minimum height of the rear-view mirror if the driver is to be able to see the ...
*Friday, January 8, 2016 by Alex*

**Physics**

On Planet X, an astronaut has maximum walking speed of 1.9 m/s. The astronaut's legs are each 1.3 m long. What is the constant of acceleration due to gravity on Planet X?
*Friday, January 8, 2016 by Someone*

**Physics**

1. What is the speed of a 70kg rock after it has fallen freely for 1000m? 2. How far would a 1kg ball have to fall freely to reach a speed of 100km/h?
*Friday, January 8, 2016 by deidra*

**Physics**

You throw a small rock straight up from the edge of a highway bridge that crosses a river. The rock passes you on its way down, 7.00 s after it was thrown. What is the speed of the rock just before it reaches the water 29.0 m below the point where the rock left your hand? ...
*Friday, January 8, 2016 by Mohamed*

** Physics**

Consider charges placed along an x-axis. If a charge of +17 nC is placed at x = 0.00 m and a charge of +32 nC is placed at x = 1.00 m, where would a third charge of -14.0 nC be in electrostatic equilibrium? Give the x-coordinate for your answer in meters and with three ...
*Friday, January 8, 2016 by Marisa*

**Physics**

A 0.527 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger, and comes to rest some distance above the plunger. The plastic tube has an inner radius of 6.22 mm, and is frictionless. Neither the plunger nor...
*Friday, January 8, 2016 by gilo*

**physics**

(1a). The gravitational field strength g on the earth’s surface is 9.8N/kg. explain what this means.(b) Using the law of gravity, show that gr2= k. Where g=gravitational field strength at a distance r from the center of the earth (r>Re), where Re is the radius of the ...
*Friday, January 8, 2016 by Anonymous*

**physics**

(1a). The gravitational field strength g on the earth’s surface is 9.8N/kg. explain what this means.(b) Using the law of gravity, show that gr2= k. Where g=gravitational field strength at a distance r from the center of the earth (r>Re), where Re is the radius of the ...
*Friday, January 8, 2016 by collins*

**physics**

(2). Determine the velocity which a body released at a distance r from the center of the earth when it strikes the earth surface.
*Friday, January 8, 2016 by collins*

**Physics**

What is the heat required in kilocalories to convert 2 kg of ice at 0°C completely into steam at 100°C? -80 Calories -1440 Calories -4186 Calories -540 Calories Thanks!
*Friday, January 8, 2016 by Ellie*

**Physics **

at the moment when a shot putter releases a 4kg shot the shot is 1.25 m above the ground and travelling at 7 m/s. it reaches a maxium height of 3.7 m above the ground and then falls to the ground. air resistance is negligible and the shot goes straight up and then comes back ...
*Friday, January 8, 2016 by Emily*

**physics**

calculate the mass of an object attached at the end of the rope 7.5m long suspended from a fixed support and made to swing.suppose the speed of the object at its lowest point of the swing is 3m/s and the tension in the rope at the lowest point is 495N
*Friday, January 8, 2016 by luflynn*

**Physics**

A .25 kg soccer ball is rolling at 6 m/s toward a player. The player kicks the ball back in the opposite direction and gives it a speed of 14 m/s. The interaction only lasted .02 seconds. Calculate the average force during the interaction. Calculate the magnitude of the ...
*Friday, January 8, 2016 by Tsun*

**physics**

a rope is tied to a bucket of water, and the bucket is swung in a vertical circle of radius 1.2m. what must be the minimum speed of the bucket at the highest point of the circle if the water is to stay in the bucket throughtout the motion?
*Friday, January 8, 2016 by milo*

**College Physics**

Consider charges placed along an x-axis. If a charge of +17 nC is placed at x = 0.00 m and a charge of +32 nC is placed at x = 1.00 m, where would a third charge of -14.0 nC be in electrostatic equilibrium? Give the x-coordinate for your answer in meters and with three ...
*Thursday, January 7, 2016 by Marisa*

**Physics 11**

A skydiver [m=95kg] jumps out of an airplane and opens her parachute 45 seconds later. After another 15 seconds, the skydiver begins to descend gently at a constant speed of 7.8m/s. Draw a freebody diagram of the skydiver just after she's jumped out the airplane AND 1 ...
*Thursday, January 7, 2016 by Rachel *

**emmanuel**

in a class of 60 student,26 offer mathmatic and 28 offer physics if 8 student do not offer any of the two subject (1)how many student offer both subject. (2)how many student offer mathematic only. (3)how many student offer physics only. (4)how many student offer only one ...
*Thursday, January 7, 2016 by toluwase*

**Physics**

A 31.9 N object is in free fall. What is the magnitude of the net force which acts on the object? Answer in units of N.
*Thursday, January 7, 2016 by Leah*

**Physics**

Then air exerts a forward force of 8 N on the propeller of a 0.25 kg model airplane. If the plane accelerates forward at 1.8 m/s^2, what is the magnitude of the resistive force exerted by the air on the airplane? Answer in units of N.
*Thursday, January 7, 2016 by Katie*

**Physics**

A 16 kg canoe moving to the left at 12m/s collides with a 4 kg raft moving to the right at 6m/s. After the collision, the raft moves to the left at 22.7m/s. What is the velocity of the canoe after the collision? You can ignore any external forces from the water
*Thursday, January 7, 2016 by Victor Olidipo*

**Physics **

A 45 kg student runs down the sidewalk at a speed of 4.20m/s and jumps onto the stationary skateboard. The student and skateboard then move down the sidewalk at 3.95 m/s. What type of collision is this? What is the mass of the skateboard?
*Thursday, January 7, 2016 by Victor Olidipo*

**Physics**

A 15000 kg railroad car moving 7m/s to the North collides with and sticks to another railroad car of the same mass that is moving the same direction at 1.5 m/s. What type of collision is this? What is the velocity of the joined cars after the collision?
*Thursday, January 7, 2016 by Victor Olidipo*

**Physics**

A 4.0 kg bowling ball rolling at a velocity of 11m/s down the bowling lane makes a head on collision with a 2.5 kg bowling pin initially at rest. After the collision, the pink has a velocity of 13.54m/s down the bowling lane. What is the final velocity of the bowling ball? ...
*Thursday, January 7, 2016 by Victor Olidipo*

**Physics**

A 5.2 kg bucket of water is raised from a well by a rope. The acceleration of gravity is 9.81 m/s^2.If the upward acceleration of the bucket is 4.0 m/s^2, find the force exerted by the rope on the bucket of water. Answer in units of N.
*Thursday, January 7, 2016 by Kenneth*

**Physics**

A firefighter of mass 39 kg slides down a vertical pole with an acceleration of 3 m/s^2. The acceleration of gravity is 10 m/s^2. What is the friction force that acts on him? Answer in units of N.
*Thursday, January 7, 2016 by Kitty*

**Physics **

A boy swings a yo-yo around his head with a force of 50N what is the gravitational force of the yo-yos mass and distance is doubled
*Thursday, January 7, 2016 by Dani*

**Physics-Conservation of Momentum**

3. A train loaded with steel, moving at 90km/h, collides head on with a stationary train of mass 6000kg. if the trains couple after collision and move forward with a velocity of 80km/h, find the mass of the train loaded with steel. My work so far: PTO=PTF mivi+m2v2=mvf mi (25m...
*Thursday, January 7, 2016 by Danielle*

**Physics**

An electric heating coil is immersed in a beaker of water and turned on. A current of 3.50 A floured through the coil. After the water starts to boil, it is found that 60.0 g of water vaporizes in 4.00 minutes. What is the resistance of the coil? (Iv = 540 cal/g)
*Thursday, January 7, 2016 by Anonymous*

**Physics**

An electric heating coil is immersed in a beaker of water and turned on. A current of 3.50 A floured through the coil. After the water starts to boil, it is found that 60.0 g of water vaporizes in 4.00 minutes. What is the resistance of the coil? (Iv = 540 cal/g)
*Thursday, January 7, 2016 by Anonymous*

**Physics**

An athlete whirls a 6.6 kg hammer tied to the end of a 1.2 m chain in a simple horizontal circle where you should ignore any vertical deviations. The hammer moves at the rate of 1.02 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included ...
*Thursday, January 7, 2016 by Abby*

**Physics**

A man on a motorcycle plans to make a jump as shown in the figure. If he leaves the ramp with a speed of 29.5 m/s and has a speed of 28.0 m/s at the top of his trajectory, determine his maximum height (h) above the end of the ramp. Ignore friction and air resistance.
*Thursday, January 7, 2016 by Jesse*

**physics**

Two chunks of ice are sliding on a frictionless frozen pond. Chunk A, with mass mA=5.0kg, moves with initial velocity vA1=2.0m/s parallel to the x-axis. It collides with chunk B, which has a mass mB=3.0kg and is initially at rest. After the collision, the velocity of chunk A ...
*Thursday, January 7, 2016 by ash*

**AP Physics**

A centrifuge rotor rotating at 12000 rpm is shut off and is eventually brought to rest by a frictional torque of 1.50 m·N. If the mass of the rotor is 4.80 kg and it can be approximated as a solid cylinder of radius 0.0710 m, through how many revolutions will the rotor ...
*Wednesday, January 6, 2016 by -*

**physics!!! Damon?**

The graph at the right is a positive vs. Time graph for the motion of an object moving along a horizontal (x) axis For each of the 8 1-second time intervals, describe the displacement, instantaneous velocity (+/- and whether the velocity is increasing or decreasing) and the ...
*Wednesday, January 6, 2016 by Lina *

**physics! description explanations **

The graph at the right is a positive vs. Time graph for the motion of an object moving along a horizontal (x) axis For each of the 8 1-second time intervals, describe the displacement, instantaneous velocity (+/- and whether the velocity is increasing or decreasing) and the ...
*Wednesday, January 6, 2016 by Lina *

**Physics **

Using the following equations as a guide (some may be used, some may not-choose wisely) y1 OR x1= initial position x2 or Y2 =final position V1 or Vi= Initial velocity V2 or Vf- Final velocity a= Acceleration T- time Equation 1.) x2=x1 +vt Equation 2.) v2= v1+at Equation 3.) ...
*Wednesday, January 6, 2016 by Lindsey*

**Physics **

Essay Question: discuss whether or not it is possible for an object to be increasing in speed as its acceleration is decreasing. For either position you take, use examples as part of your explanation. CAN SOMEONE HELP SUGGEST AN EXAMPLE THAT WOULD HELP CONFIRM MY ANSWER. I'...
*Wednesday, January 6, 2016 by Colleen*

**Subject-verb agreement**

which of the following sentences demonstrates proper subject-verb agreement? A. News travel fast. B. Measles usually spread through respiratory fluids. C. Physics is a difficult subject to learn. D. They study of various sciences are compelling. A and D are not correct. C is ...
*Wednesday, January 6, 2016 by John*

**Physics**

Compute the k.e in joule of a 500g riffle bullet traveling at 300m/s
*Wednesday, January 6, 2016 by Mikailu*

**Physics**

1) Design a gear system using 12, 34 and 36 teeth gears that achieve a gear ratio of 13.5:1 and has the top and bottom gear spinning in opposite directions. 2) For a pulley system with 8 supporting strands, how far would you have to pull the rope to lift a 125 kg object 1.0 ...
*Tuesday, January 5, 2016 by Lea*

**physics**

It has been suggested that rotating cylinders about 12.5 mi long and 4.88 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth? Answer...
*Tuesday, January 5, 2016 by king*

**PHYSICS` HELP!! Please**

Really lost on how to explain these whether true or false!! HELP! Much appreciated Write True or False. If False, Explain why! 1. In a position vs. Time graph, a line whose slope is negative represents an object that is slowing down. Answer: I circled True but it's not. ...
*Tuesday, January 5, 2016 by Deanna*

**Physics**

A 2.6 kg rock is initially at rest at the top of a cliff. Assuming the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water, how high is the cliff if the temperature of 0.98 kg of water is raised 0.10°C? (Neglect...
*Tuesday, January 5, 2016 by brianna*

**physics**

Four charges are placed at the four corners of a square of side 15 cm. The charges on the upper left and right corners are +3 μC and -6 μC respectively. The charges on the lower left and right corners are -2.4 μC and -9 μC respectively. The net electric ...
*Tuesday, January 5, 2016 by abdul*

**Physics**

For a pulley system with 8 supporting strands, how far would you have to pull the rope to lift a 125 kg object 1.0 meters off the ground? What if the pulley system were only 80% efficient?
*Tuesday, January 5, 2016 by Lea*

**Physics **

Write True or False. If False, Explain why! 1. In a position vs. Time graph, a line whose slope is negative represents an object that is slowing down. Answer: I circled True but it's not. Can you explain why my answer is wrong. 2. An object can have a non-zero velocity ...
*Tuesday, January 5, 2016 by Deanna*

**physics**

A 3.5 kg rock is initially at rest at the top of a cliff. Assuming the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water, how high is the cliff if the temperature of 0.88 kg of water is raised 0.10°C? (Neglect...
*Tuesday, January 5, 2016 by please help*

**physics**

When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1250 kg automobile traveling at 37.2 m/s comes to a halt after its brakes are applied, how much can the ...
*Tuesday, January 5, 2016 by please help*

**physics**

When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1250 kg automobile traveling at 37.2 m/s comes to a halt after its brakes are applied, how much can the ...
*Tuesday, January 5, 2016 by Jackson*

**physics**

A 3.5 kg rock is initially at rest at the top of a cliff. Assuming the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water, how high is the cliff if the temperature of 0.88 kg of water is raised 0.10°C? (Neglect...
*Tuesday, January 5, 2016 by Jackson*

**Physics**

The force on a .4 kg cannon ball in the barrel when fired at t=0 seconds is given by F= 1000- 5 * 10^4t. The acceleration of the ball is 0 as it leaves the barrel The total impulse in Newton seconds on the ball during the .02 seconds it's in the barrel would be
*Tuesday, January 5, 2016 by Joe*

**PHYSICS**

WHAT IS THE VELOCITY OF A CAR THAT TRAVELS AROUND A TRACK THAT HAS A RADIUS OF 15M IN 2 MINUTES
*Tuesday, January 5, 2016 by Anonymous*

**Physics**

A liftascends with constant acceleration a, then with constant velocity and finally stops under a constant retardation a. If the total distance ascended is s, and the total time occupied is t,show that the time during which the lift is ascending is given by {t^2 -(4s/a)}
*Tuesday, January 5, 2016 by Amah*

**physics**

A car of mass 1.2tonnes is travelling up a slope of 1 in 150 at a constant speed of 10m/s. if the frictional and air resistances are 100 newton , calculate the power exerted by the engine. the car descends the same slope working at a rate of 2kw what will be its acceleration ...
*Tuesday, January 5, 2016 by asad*

**physics**

You are on a hike in the mountains. You have 3.03 km left to go before your next campsite. The sun will set in 5.2 h. What average speed must you walk to get to camp at sunset? Answer in units of km/h.
*Monday, January 4, 2016 by zach*

**Physics**

A 25.2 kg block of wood is pulled across a floor at a constant 9.74 m/s with a constant 62.7 N force. The bottom of the box has a surface area of 65.1 cm2. If the block was put on its side (which has twice the surface area of the bottom) and pulled with the same force at the ...
*Monday, January 4, 2016 by Ron*

**physics **

As shown in the diagram, a bullet of mass 7.0 g strikes a block of wood of mass 2.1 kg. The block of wood is suspended by a string of length 2.0 m, forming a pendulum. The bullet lodges in the wood, and together they swing upward a distance of 0.40 m from the original position...
*Monday, January 4, 2016 by jose*

**physics**

a 4200 kg helicopter accelerate upward 3m/s^2. lift force is exerted by the air on the propellers?(g=10m/s^2)
*Monday, January 4, 2016 by biruk*

**Physics**

suppose that an astronaut throws a rock into outer space at a location far from significant influences of gravity and air resistance. One would expect the rock would A. eventually stop because all objects "lose steam" B. eventually stops as its inertia becomes used ...
*Monday, January 4, 2016 by Blair*

**physics**

Two balls have the same mass. One ball moving along the positive x-axis and the other ball moving along the positive y-axis undergo perfectly inelastic collision. What can you say about the motion of the balls after the collision? a) the balls stick and move together b) the ...
*Monday, January 4, 2016 by shusha*

**physics**

a stone propelled from a catapult with a speed of 50ms-1 attains a height of 100m. Calculate the time of flight and the angle of projection
*Monday, January 4, 2016 by chisom*

**Physics**

Show that the function y(x,t) = X^2+V^2t^2 is a solution of the general wave equation.
*Monday, January 4, 2016 by Godwin*

**physics**

A 1500 kg car traveling West at 90.0 km/h collides with a 1400 kg truck traveling North at 72.0 km/h.The two vehicles entangle after the collision and head off as one. What is the velocity of the wreckage immediately after the collision?
*Monday, January 4, 2016 by Mia*

**physics **

When a 80kg block of mass is pushed by 400 Newton at an angle of 37 degrees above the horizontal to accelerate from 20 m/s what will be the final velocity after 6 second
*Sunday, January 3, 2016 by Anonymous*

**Physics**

What is the resistivity of a cylinderical material wire whose 1.0m lenght has a resistance of 2.0 ohm? The radius of the wire is 1.0mm
*Sunday, January 3, 2016 by Mercy*

**physics**

find the acceleration of a bicycle slowing fron 3m/s to a stop in 5 seconds?
*Saturday, January 2, 2016 by aira*

**Physics of ice skating**

hello! so I know when learning to skate, you should position your skate at a 45 degree angle, but i'm not sure why. is it because if you just position them straight,the low friction of the ice won't allow you to move/ push forward? plus does the 45 angle allow you to ...
*Saturday, January 2, 2016 by Nora*

**Physics**

During volcanic eruptions, chunks of solid rock can be blasted out of the volcano; these projectiles are called volcanic bombs. The Figure shows a cross section of Mt. Fuji, in Japan. (a) At what initial speed would a bomb have to be ejected, at angle q0 = 35° to the ...
*Saturday, January 2, 2016 by Sam*

**Physics-science**

A block of wood has a mass of 3.6kg and specific gravity of 0.6. It is to be loaded with lead of density of 11300 kg per cubic metre so that it floats in water with 0.90 of its volume immersed. What mass of lead is needed? (a) if the lead is on top of the wood? (b) if the lead...
*Saturday, January 2, 2016 by KAZIN BONNY*

**Physics**

Imagine a landing craft approaching the surface of the moon of a distant planet. If the engine provides an upward force (thrust) of 2890 N, the craft descends at constant speed; if the engine provides only 2200 N, the craft accelerates downward at 0.36 m/s2.
*Saturday, January 2, 2016 by Hannah*

**Physics**

A soccer ball is kicked with 26.5n and accelerates at 6.5 m/s 2 to the right. What is the mass of the ball?
*Friday, January 1, 2016 by Tori*

**physics**

Which of the following is correct for the reflected ray if a light ray strikes a plane mirror at an angle of 50° from the normal?
*Friday, January 1, 2016 by Tam*

**physics**

A metal sphere has a charge of -6 µC. How many excess electrons are there on the sphere?
*Friday, January 1, 2016 by Tam*

**physics**

What is the frequency of a pendulum that completes 40 cycles in 8 minutes?
*Friday, January 1, 2016 by Tam*

**Physics**

You are on the roof of the physics building, 46 m above the ground. Your physics professor, who is 1.80 m tall, is walking alongside the building at a constant speed of 1.20 m/s. If you wish to drop an egg on your professor’s head, where should the professor be when you ...
*Friday, January 1, 2016 by Edge*

**Physics**

is electric field intensity the same as potential difference?
*Friday, January 1, 2016 by Anonymous*

**Maths/physics need help agn**

A hand bag containing some loads weighing 162n is carried by two student, each holding the handle of the bag next to him..if each handle is pulled 60degree to the vertical find the force of each student? Help plz
*Friday, January 1, 2016 by Collins*

**Maths/physics**

A catapult used to hold a stone of mass 500g is extended by 20cm with applied force .f if the stone leaves with a velocity of 40m/s,what is the value of f? Help plz
*Friday, January 1, 2016 by Collins*

**physics**

A disk with a rotational inertia of 1.4 kg×m2 and a radius of 0.8 m rotates on a frictionless fixed axis perpendicular to the disk faces and through its center. A force of 5.2 N is applied tangentially to the rim. The angular acceleration of the disk is:
*Thursday, December 31, 2015 by Ahmad*

**physics**

Three resistors having the same resistance value are wired in parallel. How does the equivalent resistance compare to the resistance value of a single resistor?
*Thursday, December 31, 2015 by Tam*

**physics**

a racing car accelerates from rest to 30m/s in 6.0s what is her average acceleration? the answer in the book is 0.5m/s^2
*Thursday, December 31, 2015 by girl*

**physics**

At a distance of 2.0 m. from a +8.0 x 10^-6 C charge, the magnitude and direction of the electric field will be?
*Thursday, December 31, 2015 by Joyce*

**physics**

Calculate the work required to be done to stop a car of 250 kg moving at a speed of 18km/hr? answer is right or not please check Mass =250 kg Velocity = 18kg = 18 x 1000/60 x 60 = 5 m/s KE = ½ mv x v = ½ x 250 x 5 = 125 x 5 = 625 J Therefore the counter back this...
*Thursday, December 31, 2015 by Evangelin Lenin*

**physics kinematics**

A river flows at 2m/s the velocity of a ferry relative to the shore is 4m/s at right angles to the current what is the velocity of the ferry relative to the current?
*Thursday, December 31, 2015 by Na*

**Physics**

A 100 kg. man decides to go bungee jumping off a bridge. The bungee cord has a relaxed length of 10.0 m, and acts as a perfect spring with a stiffness constant of 80 N/m. What is the maximum distance below the bridge that he will reach? (he will fall 10.0 m. before the bungee ...
*Wednesday, December 30, 2015 by Joyce*