Monday
April 27, 2015

Homework Help: Science: Physics

Recent Homework Questions About Physics

physics
You're heading an international effort to save Earth from an asteroid heading toward us at 11km/s . Your team mounts a rocket on the asteroid and fires it for 10 min, after which the asteroid is moving at 21km/s at 32∘ to its original path. In a news conference, what...
Sunday, January 25, 2015 at 6:36pm

physics
A hockey puck moving at 37m/s slams through a wall of snow 31cm thick. It emerges moving at 15m/s . Part A Assuming constant acceleration, find the time the puck spends in the snow. Express your answer to two significant figures and include the appropriate units. Part B ...
Sunday, January 25, 2015 at 6:35pm

physics
A model rocket leaves the ground, heading straight up at 45m/s . Part A What's its maximum altitude? Express your answer to two significant figures and include the appropriate units. Part B Find its velocity at 1 s? Express your answer to two significant figures and ...
Sunday, January 25, 2015 at 6:26pm

physics
You drop a rock into a deep well and 4.1s later hear the splash. How far down is the water? Neglect the travel time of the sound. Express your answer using two significant figures.
Sunday, January 25, 2015 at 6:24pm

physics
A cannon fires a shell straight upward; 2.4 s after it is launched, the shell is moving upward with a speed of 18 m/s. Assuming air resistance is negligible, find the speed (magnitude of velocity) of the shell at launch and 5.4 s after the launch. What is the velocity at ...
Sunday, January 25, 2015 at 5:50pm

physics
The wheels of a certain roller coaster are both above and below the rails as shown in the figure so that the car will not leave the rails. The mass supported by this particular wheel is 117 kg and the radius of this section of track is 44 m. The acceleration of gravity is 9.8 ...
Sunday, January 25, 2015 at 12:56pm

physics
An 94.4 kg astronaut is working on the engines of a spaceship that is drifting through space with a constant velocity. The astronaut turns away to look at Earth and several seconds later is 29.6 m behind the ship, at rest relative to the spaceship. The only way to return to ...
Sunday, January 25, 2015 at 12:01pm

physics
A 24.0 g marble sliding to the right at 60.8 cm/s overtakes and collides elastically with a 12.0 g marble moving in the same direction at 15.2 cm/s. After the collision, the 12.0 g marble moves to the right at 76 cm/s. Find the velocity of the 24.0 g marble after the collision.
Sunday, January 25, 2015 at 11:43am

physics
A 2100 kg car traveling at 12.0 m/s collides with a 2780 kg car that is initially at rest at the stoplight. The cars stick together and move 3.90 m before friction causes them to stop. Determine the coefficient of kinetic friction betwen the cars and the road, assuming that ...
Sunday, January 25, 2015 at 11:38am

Physics
Two forces of 5N and 7N respectively act on an object,When will the resultand of the two vectors be at max?
Sunday, January 25, 2015 at 11:11am

Physics Pendulum
1. Many pendulums used in clocks are made of a thin metal bar with a very thin (in the plane of oscillation) adjustable bob. a) Why the emphasis on a thin bar and bob? b) for what reasons would the bob be moved up or down the bar? 2. A young child sits on a playground swing ...
Sunday, January 25, 2015 at 9:00am

Physics
50 grams of ice cubes at -5oC is added to a 1 litre (1 kg) of water that is initially at 30oC. a) Use the table of values to find the energy needed to melt the ice:(energy to raise the temperature of the ice to 0oC+ change the state of the ice to water) b) Hence find the ...
Sunday, January 25, 2015 at 8:43am

Physics
At what speed must I travel, in kms, if i need to travel 22.6 kms in 18 minutes?
Sunday, January 25, 2015 at 5:42am

physics
two ectors act on the same pont. what should the angle between them be so that a maximum resultant is obtained a. o degree b. 90 degree c. 180 degree d. cannot tell answer : a. 0 degree
Sunday, January 25, 2015 at 3:05am

Maths and Physics
An inverted garbage can of Weight W is suspended in air by water from a geyser. The water shoots up from the ground with a speed u, at a constant rate dm/dt. Find the maximum height at which the garbage can rides.What assumption must be fulfilled for the maximum height to be ...
Sunday, January 25, 2015 at 2:57am

Physics
In a 100 m linear accelerator, an electron is accelerated to 1.40% of the speed of light in 46.0 m before it coasts for 54.0 m to a target. What's the electron's acceleration during the first 46.0 m? b) How long does the total flight take?
Saturday, January 24, 2015 at 9:35pm

physics
One particle has a mass of 2.86 x 10-3 kg and a charge of +7.32 μC. A second particle has a mass of 6.41 x 10-3 kg and the same charge. The two particles are initially held in place and then released. The particles fly apart, and when the separation between them is 0.127 ...
Saturday, January 24, 2015 at 8:56pm

physics
Tom has a mass of 67.2 kg and Sally has a mass of 58.5 kg. Tom and Sally are standing 23 m apart on a massless dance floor. Sally looks up and she sees Tom. She feels an attraction. If the attraction is gravitation, find its magnitude. Assume both can be replaced by spherical ...
Saturday, January 24, 2015 at 8:41pm

physics
A series of two 2.0 kg blocks are attached together through string B.Two of the blocks weigh each 2.0 kg and are now being use for a new experiment. The blocks are being pulled upwards by another string A with a force of 25 N. What is the acceleration of the blocks?(3.55 m/s^2...
Saturday, January 24, 2015 at 8:33pm

physics
A series of two 2.0 kg blocks are attached together through string B.Two of the blocks weigh each 2.0 kg and are now being use for a new experiment. The blocks are being pulled upwards by another string A with a force of 25 N. What is the acceleration of the blocks?(3.55 m/s^...
Saturday, January 24, 2015 at 7:13pm

Intro. Physics!!!
1------- A -10 uC charge is placed 0.20 m away from an unknown charge. The force between the two charges is found to be attractive and has a value of 9.0 N. What is the magnitude and sign of the other charge? 2-------- A -5 uC charge is a distance of 12 cm from a 7 uC charge. ...
Saturday, January 24, 2015 at 7:00pm

Physics
1) if a positive and negative charge each has a magnitude of 6 uC and are separated by a distance of 10 cm, what is the force between the particles? 2) Given that the repulsive force between two identical positive point charges is 1.0 N when the charges are 0.5 m apart, what ...
Saturday, January 24, 2015 at 6:52pm

College Physics
Two pucks traveling at each other collide and deflect at 30.0° angles from their original velocities. The mass of Puck B is 20% greater than the mass of Puck A. Before colliding, the pucks approach each other with momenta of equal magnitudes and opposite directions. After ...
Saturday, January 24, 2015 at 6:34pm

College Physics
An electron in a television tube travels the 12 cm distance from the grid to the screen at an average speed of 7.00 107m/s. How long does the trip take?
Saturday, January 24, 2015 at 5:52pm

Physics
A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 19.0m/s , and the distance between them is 52.0m . After t1 = 5.00s , the motorcycle starts to accelerate at...
Saturday, January 24, 2015 at 4:33pm

Physics
A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 19.0m/s , and the distance between them is 52.0m . After t1 = 5.00s , the motorcycle starts to accelerate at...
Saturday, January 24, 2015 at 4:33pm

Physics
Three charges, Q1, Q2 and Q3 are located on a straight line. The charge Q3 is located 0.136 m to the right of Q2. The charges Q1 = 1.22 μC and Q2 = -2.46 μC are fixed at their positions, distance 0.301 m apart, and the charge Q3 = 3.03 μC could be moved along ...
Saturday, January 24, 2015 at 4:18pm

physics
Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.82 m. The stones are thrown with the same speed of 8.88 m/s. Find the location (above the base of the ...
Saturday, January 24, 2015 at 3:13pm

physics
an orienteer runs 300m north and then 400m to the southeast (at a 45 degree angle to north). if he runs at a constant speed, how far away is he from the starting position?
Saturday, January 24, 2015 at 3:08pm

Physics
A car slows down from a speed of 24.0m/s to rest in 9.0s, How far did it travel in that time?
Saturday, January 24, 2015 at 1:55pm

Physics
Any help direction is appreciated. Inez is putting up decorations for her sister's quinceanera (fifteenth birthday party). She ties three light silk ribbons together to the top of a gateway and hangs from each ribbon a rubber balloon. To include the effects of the ...
Saturday, January 24, 2015 at 1:40pm

physics
After coming down a steep hill at a constant speed of 49 m/s, a car travels along the circumference of a vertical circle of radius 329 m until it begins to climb another hill. What is the magnitude of the resultant force on the 170 kg driver of the car at the lowest point on ...
Saturday, January 24, 2015 at 1:20pm

physics
A ball of mass 21.7 g is attached to a cord of length 0.61 m and rotates in a vertical circle. What is the minimum speed the ball must have at the top of the circle so the cord does not become slack? The acceleration of gravity is 9.8 m/s . Answer in units of m/s
Saturday, January 24, 2015 at 1:03pm

Physics
Two students on roller skates stand face-toface, then push each other away. One student has a mass of 96 kg and the second student 56 kg. Find the ratio of the magnitude of the first student’s velocity to the magnitude of the second student’s velocity.
Saturday, January 24, 2015 at 7:46am

Physics
car leaves skid mark 72m in length with a deceleration speed of 7.20m/s^2. what was the initial speed prior to braking?
Saturday, January 24, 2015 at 12:55am

physics
A boy on a 1.9 kg skateboard initially at rest tosses a(n) 8.0 kg jug of water in the forward direction. If the jug has a speed of 2.7 m/s relative to the ground and the boy and skateboard move in the opposite direction at 0.65 m/s, find the boy’s mass. Answer in units of kg
Friday, January 23, 2015 at 9:25pm

physics
A(n) 0.364 kg soccer ball approaches a player horizontally with a speed of 19.7 m/s. The player illegally strikes the ball with her hand and causes it to move in the opposite direction with a speed of 22.4 m/s. What is the magnitude of the impulse delivered to the ball by the ...
Friday, January 23, 2015 at 9:24pm

physics
A physical pendulum is constructed of a 48 cm long piece of wooden dowel with a mass of 550 grams and a radius of 0.7 cm. Attached at one end of the pipe is a hoop with a radius of 6 cm and a mass of 1.2 kg as shown. The pendulum is released from the 12:00 position and allowed...
Friday, January 23, 2015 at 8:35pm

Physics
A)A very narrow beam of white light is incident at 42.20° onto the top surface of a rectangular block of flint glass 12.6 cm thick. The indices of refraction of the glass for red and violet light are 1.647 and 1.672, respectively. Calculate the dispersion angle (i.e., the ...
Friday, January 23, 2015 at 8:33pm

physics
A hockey puck slides with an initial speed of 40.7 m/s on a large frozen lake. If the coefficient of kinetic friction between the puck and the ice is 0.038, what is the speed of the puck after 11.9 s?
Friday, January 23, 2015 at 6:35pm

Physics
A car leaves skid marks 72m in length. The deceleration is 7.2m/s^2. What is the speed of the car before braking?
Friday, January 23, 2015 at 5:42pm

Physics
In the Daytona 500 auto race, a Ford Thunderbird and a Mercedes Benz are moving side by side down a straight-away at 67.5 m/s. The driver of the Thunderbird realizes he must make a pit stop, and he smoothly slows to a stop over a distance of 250 m. He spends 5.00 s in the pit ...
Friday, January 23, 2015 at 5:17pm

physics
A 1100·kg elevator is attached to a cable whose tension is 10900·N. What is the magnitude of the elevator's acceleration?
Friday, January 23, 2015 at 2:01pm

integrated physics and chemistry
The velocity of a car traveling north decreases from 20 m/s to 12 m/s in 32 seconds. What is the acceleration of the car? I answered it as 0.25 m/s^2 North. Is this correct?
Friday, January 23, 2015 at 1:51pm

physics
An unknown substance with a mass of 300 g absorbs 1000 j of heat while undergoing a temperature increase of 15 degrees c. What is the specific heat of the unknown substance ?
Friday, January 23, 2015 at 1:09pm

physics
An object has the following equation of motion (equation describing its position as a function of time). x(t) = x0 where x0 = −2.3 m. What is the object’s position at time t = 23 s? What is its velocity?
Friday, January 23, 2015 at 12:43pm

physics
Two girls pull a 15 kg sled, each with her own rope. They pull horizontally at an angle of 30 degrees from each other with identical forces of 25 N each. The coefficient of friction between the snow and the sled is 0.1. The acceleration of gravity is 9.8 m/s2 . What is the ...
Friday, January 23, 2015 at 11:29am

physics
5m ladder leans against frictionless wall. point of contact is 4m above the ground. ladder has uniform mass of 15kg. determine forces by ground and the wall on the ladder
Friday, January 23, 2015 at 7:01am

physics
a stone propelled from a catapult with a speed of 50mls,attains a height of 100m. Calculate the angle of projection and range.
Friday, January 23, 2015 at 12:37am

PHYSICS
A 1250 KG wrecking ball is lifted to a height of 12.7 m above its resting point . When the wrecking ball is released, its swings toward an abandoned building and makes an indentation of 43.7 cm in the wall. A) What is the potential energy of the wrecking ball at a height of 12...
Thursday, January 22, 2015 at 11:11pm

Physics
A(n) 57.3 kg astronaut becomes separated from the shuttle, while on a space walk. She finds herself 54.3 m away from the shuttle and moving with zero speed relative to the shuttle. She has a(n) 0.697 kg camera in her hand and decides to get back to the shuttle by throwing the ...
Thursday, January 22, 2015 at 11:09pm

physics
The speed of a bullet as it travels down the barrel of a rifle toward the opening is given by v = (-4.25 107) t 2 + (3.45 105) t, where v is in meters per second and t is in seconds. The acceleration of the bullet just as it leaves the barrel is zero. (a) Determine the ...
Thursday, January 22, 2015 at 10:40pm

Physics
A dog running in an open field has components of velocity vx = 3.0m/s and vy = -1.1m/s at time t1 = 11.7s . For the time interval from t1 = 11.7s to t2 = 22.2s , the average acceleration of the dog has magnitude 0.55m/s2 and direction 34.5∘ measured from the +x−...
Thursday, January 22, 2015 at 10:34pm

physics
An athlete leaves one end of a pool of length L at t = 0 and arrives at the other end at time t1. She swims back and arrives at the starting position at time t2. If she is swimming initially in the positive x direction, determine her average velocities symbolically in the ...
Thursday, January 22, 2015 at 10:09pm

physics
a force of 1600N is used to push a crate of brick at a rate of 40m/s squard. If the crate weights 150kg, how much do the bricks weight?
Thursday, January 22, 2015 at 9:47pm

physics
a 1kg object moving east with a velocity of 10 m/s collides with a .50kg object that is at rest. neglecting friction, what is the momentum of the system? please show work
Thursday, January 22, 2015 at 8:57pm

physics
a 1kg object moving east with a velocity of 10 m/s collides with a .50kg object that is at rest.neglecting friction, what is the momentum of the system
Thursday, January 22, 2015 at 8:54pm

Physics
The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration -5.40 m/s2 for 4.40 s, making straight skid marks 63.1 m long ending at the tree. With what speed does the car then strike the tree?
Thursday, January 22, 2015 at 7:27pm

Physics
A rabbit runs in a straight line with a velocity of +1.3 m/s for a period of time, rests for 11 s, and then runs again along the same line at +0.65 m/s for an unknown amount of time. The rabbit travels a total distance of 1080 m, and its average speed is 0.79 m/s.What is the ...
Thursday, January 22, 2015 at 6:51pm

Physics
You raise a bucket of water from the bottom of a well that is 12 m deep. The mass of the bucket and the water is 5.00 kg, and it takes 15 s to raise the bucket to the top of the well. How much power is required? Pe= 60.00 Work= Force*direction
Thursday, January 22, 2015 at 6:20pm

Physics
You raise a bucket of water from the bottom of a well that is 12 m deep. The mass of the bucket and the water is 5.00 kg, and it takes 15 s to raise the bucket to the top of the well. How much power is required?
Thursday, January 22, 2015 at 6:18pm

physics
A projectile of mass 0.528 kg is shot from a cannon, at height 6.7 m, as shown in the figure, with an initial velocity vi having a horizontal component of 7 m/s. The projectile rises to a maximum height of 3.8 m above the end of the cannon’s barrel and strikes the ground ...
Thursday, January 22, 2015 at 5:39pm

physics
A copper telephone wire has essentially no sag between poles 30 m apart on a winter day when the temperature is −16◦C. How much longer is the wire on a summer day when the temperature is 26 ◦C? Assume that the thermal coefficient of copper is constant ...
Thursday, January 22, 2015 at 5:39pm

physics
A tennis ball has a mass of 58 g and a diameter of 8 cm. Find the moment of inertia about its diameter. Assume that the ball is a thin spherical shell.
Thursday, January 22, 2015 at 3:09pm

physics
The system shown in the figure below consists of a mass M = 3.5-kg block resting on a frictionless horizontal ledge. This block is attached to a string that passes over a pulley, and the other end of the string is attached to a hanging m = 2.2-kg block. The pulley is a uniform...
Thursday, January 22, 2015 at 3:08pm

physics
A 2.1-kg 12-cm-radius cylinder, initially at rest, is free to rotate about the axis of the cylinder. A rope of negligible mass is wrapped around it and pulled with a force of 18 N. (a) Find the magnitude of the torque exerted by the rope. N · m (b) Find the angular ...
Thursday, January 22, 2015 at 3:08pm

Physics
A plane has a max speed of 200 km/h. What is the maximum speed it can travel due west if there's a northwest wind at 50 km/h?
Thursday, January 22, 2015 at 2:13pm

Physics
A fully equipped astronaut has a mass of 170 kg. If the astronaut has a weight of 675 N standing on the surface of a planet, what is the acceleration due to gravity on this planet?
Thursday, January 22, 2015 at 11:12am

physics
The driver of a car traveling at 60 ft/sec suddenly applies the brakes. The position of the car is s(t) = 50t - 2t2, t seconds after the driver applies the brakes. How many seconds after the driver applies the brakes does the car come to a stop?
Thursday, January 22, 2015 at 2:15am

physics
A canoe has a velocity of 0.31m/s southeast relative to the earth. The canoe is on a river that is flowing
Thursday, January 22, 2015 at 1:02am

Physics
In the deep ocean, a water wave with wavelength 95 m travels at 12 m/s. Suppose a small boat is at the crest of this wave, 1.8m above the equilibrium position.What will be the vertical position of the boat 3.0s later?
Thursday, January 22, 2015 at 12:53am

physics 11
A 1000 kg car travelling at 25m/s south collides head-on with a 2250 kg car travelling at 10m/s in the opposite direction. They stick together after collision. Which way does the wreckage move? What is their final velocity?
Thursday, January 22, 2015 at 12:08am

Physics
What is the y-component of a vector in the x-y plane whose magnitude is 87.8 and whose x-component is 64.9?
Wednesday, January 21, 2015 at 10:05pm

Physics
I have a test tomorrow and I don't really understand this question, I was hoping somebody could help explain it? If 2.75x10¹⁹ electrons pass a point in a circuit in 30s, what is the current?
Wednesday, January 21, 2015 at 10:05pm

physics
A football is kicked at ground level with a speed of 15.4 m/s at an angle of 34.7° to the horizontal. How much later does it hit the ground? (in s)
Wednesday, January 21, 2015 at 10:03pm

Physics
Romeo is chucking pebbles gently up to Juliet's window and he wants the pebbles to hit the window with only a horizontal component of velocity (the least possible speed). He is standing at the edge of a rose garden at H = 4.62 m below her window and at D = 5.21 m from the ...
Wednesday, January 21, 2015 at 10:02pm

Physics
He is standing at the edge of a rose garden at H = 4.62 m below her window and at D = 5.21 m from the base of the wall. How fast are the pebbles going when they hit her window?
Wednesday, January 21, 2015 at 10:00pm

physics
A diver running 1.89 m/s dives out horizontally from the edge of a vertical cliff and 2.88 s later reaches the water below. How high was the cliff. (in m)
Wednesday, January 21, 2015 at 9:50pm

physics
A string that passes over a pulley has a 0.375 kg mass attached to one end and a 0.630 kg mass attached to the other end. The pulley, which is a disk of radius 9.50 cm, has friction in its axle. What is the magnitude of the frictional torque that must be exerted by the axle if...
Wednesday, January 21, 2015 at 9:44pm

physics
A cat walks along a uniform plank that is 4.00 m long and has a mass of 7.00 kg. The plank is supported by two sawhorses, one 0.44 m from the left end of the board and the other 1.60 m from its right end. When the cat nears the right end, the plank just begins to tip. If the ...
Wednesday, January 21, 2015 at 9:43pm

physics
The components of a vector V are often written (Vx, Vy, Vz). What is the x component of a vector which is the sum of the two vectors, V1 and V2, whose components are (3.27, 1.86, 0.00) and (3.85, -3.53, -1.43)?
Wednesday, January 21, 2015 at 9:42pm

physics
A 10.7 kg bowling ball moves in a straight line at 4.26 m/s. How fast must a 2.55 g Ping-Pong ball move in a straight line so that the two balls have the same momentum?
Wednesday, January 21, 2015 at 8:39pm

physics
A person walks first at a constant speed of 5.10 m/s along a straight line from point circled A to point circled B and then back along the line from circled B to circled A at a constant speed of 3.15 m/s.(a) What is her average speed over the entire trip? How can I find the ...
Wednesday, January 21, 2015 at 7:53pm

Physics
Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 5 m/s2 for 4.2 seconds. It then continues at a constant speed for 11.1 seconds, before applying the brakes such that the car...
Wednesday, January 21, 2015 at 5:15pm

physics
Consider a thin spherical shell of radius 20.2cm with a total charge of 3.3μC distributed uniformly on its surface. a) Find the electric field, in N/C, at a radius of 15.6cm from the center of the charge distribution. b) Find the electric field, in N/C, at a radius of 27....
Wednesday, January 21, 2015 at 3:35pm

physics
A train whistle is heard at 280Hz as the train approaches town. The train cuts its speed in half as it nears the station, and the sound of the whistle is then 270 Hz. What is the speed of the train before slowing down? What is the speed of the train after slowing down?
Wednesday, January 21, 2015 at 3:34pm

Physics
Chinook salmon are able to move through water especially fast by jumping out of the water periodically. This behavior is called porpoising. Suppose a salmon swimming in still water jumps out of the water with velocity 6.41 m/s at 44.1° above the horizontal, sails through ...
Wednesday, January 21, 2015 at 2:57pm

physics
The following charges are located inside a metallic container on unknown shape: 5.00 μC, -4.60 μC, 67.0 μC, and -50.0 μC. Calculate the net electric flux, in Nm2/C, through the container
Wednesday, January 21, 2015 at 12:29pm

physics
A proton is placed at rest in an electric field of 515 N/C. Calculate the speed of the proton 36.0 ns after being released
Wednesday, January 21, 2015 at 11:41am

physics
An object having a net charge of 18.2 μC is placed in a uniform electric field of 790 N/C directed vertically upward, i.e. in the direction opposite gravity. What is the mass, in grams, of this object if it "floats" in the field? (Assume g = 9.80 m/s2.)
Wednesday, January 21, 2015 at 11:30am

Physics
When will the resultant of the 5N and 7N be at a maximum?
Wednesday, January 21, 2015 at 9:20am

physics
Suppose that you balance a 5 kg ball on the tip of your finger that has an area of 1 cm2. What is the pressure on your finger?
Wednesday, January 21, 2015 at 3:29am

physics
A rectangular barge floats in freshwater. When a 400 kg block is loaded on the 5 m long by 2 m wide barge, the barge sinks a few centimeters deeper. How much deeper does the barge lower?
Wednesday, January 21, 2015 at 3:11am

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

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