Friday

October 9, 2015
**physics**

An extreme skier slides down an incline that forms an angle 24 degrees above the horizontal. The skier starts from rest and accelerates firmly at 4.00m/s^2 for a distance of 50.0m to the edge of a cliff. The cliff is 30.0m above the powdery snow below. Find how far from the ...
*Wednesday, September 30, 2015 by jason*

**Physics**

How long does it take an automobile traveling 72.5 km/h to become even with a car that is traveling in another lane at 55.5 km/h if the cars’ front bumpers are initially 146 m apart?
*Wednesday, September 30, 2015 by cortney*

**Physics**

A red colored ball tossed upward reaches a maximum height of 3.0m. show that the initial speed is 7.7m/s^2.
*Tuesday, September 29, 2015 by Erin*

**Physics**

A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound of the ball hitting the pins 2.44 s after the ball is released from his hands. What is the speed of the ball? The speed of sound is 340 m/s.
*Tuesday, September 29, 2015 by Courtney*

**Physics**

I have a question about a vector addition problem using the polygon method. Vector 1 has a magnitude of .1 and theta of 30 degrees. Vector 2 has a magnitude of .2 and a theta of 90 degrees. Vector 3 has a magnitude of .3 and a theta of 225 degrees. I'm confused because if ...
*Tuesday, September 29, 2015 by Claire*

**physics**

An object is thrown vertically up and attains an upward velocity of 10 m/s when it reaches one fourth of its maximum height above its launch point. What was the initial speed of the object? The acceleration of gravity is 9.8 m/s2. Answer in units of m/s
*Tuesday, September 29, 2015 by Curt*

**Physics**

Vector A and vector B both lie in the same xy plane . Is it possible for them to have same magnitude but different components and same components but different magnitude ?
*Tuesday, September 29, 2015 by Tapendra*

**Physics**

A parachutist bails out of airplane and suddenly parachute did not open but after falling 80 m he opens his parachute due to which retardation of 4m/s . He reaches on the ground with velocity 4m/s . What was the height of airplane at the time of bail and total time taken by ...
*Tuesday, September 29, 2015 by Tapendra*

**Physics**

Two soccer players start from rest, 30 m apart. They run directly toward each other, both players accelerating. The first player’s acceleration has a magnitude of 0.49 m/s2. The second player’s acceleration has a magnitude of 0.43 m/s2. (a) How much time passes ...
*Tuesday, September 29, 2015 by Natasha*

**Physics**

In getting ready to slam-dunk the ball, a basketball player starts from rest and sprints to a speed of 6.20 m/s in 3.56 s. Assuming that the player accelerates uniformly, determine the distance he runs.
*Tuesday, September 29, 2015 by Natasha*

**Physics**

What effect does the normal force have on the coefficients of friction?
*Tuesday, September 29, 2015 by Frank*

**Physics**

A car travels due east with a speed of 40.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 54.0° with the vertical. Find the velocity of the rain with respect to ...
*Tuesday, September 29, 2015 by Aly*

**physics**

obtain the resultant and direction of each pair of the forces 1.20N on top of a triangle and, 15N3 under the triangle and 45 as the degree of the triangle. 2.20N on top of right angle triangle and 15N under the right angle triangle.
*Tuesday, September 29, 2015 by godsgift*

**Physics**

Select the motion diagram that corresponds to each of the four situations. E.g., if diag. A corresponds to the first situation, diag. C to the second, and none of the diagrams to situations 3 and 4, enter ACNN. Note that the velocity and acceleration vectors are shown; both ...
*Tuesday, September 29, 2015 by Mike*

**Physics**

Select the motion diagram that corresponds to each of the four situations. E.g., if diag. A corresponds to the first situation, diag. C to the second, and none of the diagrams to situations 3 and 4, enter ACNN. Note that the velocity and acceleration vectors are shown; both ...
*Tuesday, September 29, 2015 by Michael *

**physics**

water flows in river 0.5km wide with speed 6km/hr. A boat can travel with speed 10km/hr in still water. In what direction should boat sail to reach opposite bank?
*Tuesday, September 29, 2015 by mcqueen*

**Physics Projectile Motion**

A projectile is launched at ground level with an initial speed of 51.5 m/s at an angle of 35.0° above the horizontal. It strikes a target above the ground 2.50 seconds later. What are the x and y distances from where the projectile was launched to where it lands?
*Tuesday, September 29, 2015 by Marcus*

**Physics Projectile Motion**

An archer shoots an arrow at a 72.0 m distant target, the bull's-eye of which is at same height as the release height of the arrow. (a) At what angle must the arrow be released to hit the bull's-eye if its initial speed is 36.0 m/s? (Although neglected here, the ...
*Tuesday, September 29, 2015 by Abby*

**Physics Projectile Motion**

A ball is kicked with an initial velocity of 21 m/s in the horizontal direction and 16 m/s in the vertical direction. (Assume the ball is kicked from the ground.) (a) At what speed does the ball hit the ground? (b) For how long does the ball remain in the air? (c) What maximum...
*Tuesday, September 29, 2015 by Abby*

**physics **

A rectangular coil of dimensions 20cm by 15cm lies with its plane parallel to a magnetic field of 0.5W/m^2. The coil, carrying a current of 10A experiences a torque of 4.5Nm in the field. How many loops has the coil?
*Tuesday, September 29, 2015 by CALLISTUS *

**Physics**

A car travels 3.0km due south and then 4.0km due west.what is it displacement from the starting point. R^2=A^2 B^2 am not sure if dat is the formula please help me
*Tuesday, September 29, 2015 by Kazekage carter kumo*

**Physics**

A shell is fired from the ground with an initial speed of 1.62 ✕ 103 m/s at an initial angle of 58° to the horizontal. (a) Neglecting air resistance, find the shell's horizontal range.
*Monday, September 28, 2015 by Caleb*

**Physics kinematics **

An archer shoots an arrow at a 72.0 m distant target, the bull's-eye of which is at same height as the release height of the arrow. (a) At what angle must the arrow be released to hit the bull's-eye if its initial speed is 36.0 m/s? (Although neglected here, the ...
*Monday, September 28, 2015 by Elijah*

**Physics **

Suppose a soccer player kicks the ball from a distance 31 m toward the goal. Find the initial speed of the ball if it just passes over the goal, 2.4 m above the ground, given the initial direction to be 44° above the horizontal. Help please !
*Monday, September 28, 2015 by Anton*

**Physics**

A stone is dropped from the roof of a building: 2.5s after, a second stone is thrown straight down with an initial speed of 24m/sec, and the two stones lands at the same time. (A) how long did it take the first stone to reach the ground
*Monday, September 28, 2015 by Sasa*

**Physics **

A projectile is launched at ground level with an initial speed of 51.5 m/s at an angle of 35.0° above the horizontal. It strikes a target above the ground 2.50 seconds later. What are the x and y distances from where the projectile was launched to where it lands? ?!?! No ...
*Monday, September 28, 2015 by Deja*

**Physics Kinematics. **

A ball is kicked with an initial velocity of 21 m/s in the horizontal direction and 16 m/s in the vertical direction. (Assume the ball is kicked from the ground.) (a) At what speed does the ball hit the ground? (b) For how long does the ball remain in the air? (c) What maximum...
*Monday, September 28, 2015 by Destiny*

**Physics 2D Kinematics **

A ball is kicked with an initial velocity of 21 m/s in the horizontal direction and 16 m/s in the vertical direction. (Assume the ball is kicked from the ground.) So Confused . No Idea Where To Start. help Please !
*Monday, September 28, 2015 by Dessy *

**physics**

every year the earth travels on its orbit about the sun. What is earth average speed in m/s, taken that the average orbital radius in 93,200,000 miles
*Monday, September 28, 2015 by nichols*

**Physics**

A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound of the ball hitting the pins 2.50 s after the ball is released from his hands. What is the speed of the ball? The speed of sound is 340 m/s.
*Monday, September 28, 2015 by Courtney*

**physics**

A metal Bob of mass0.6kg is attracted to the end of a string of length1m.the Bob is whirled in a horizontal circle with a uniform speed of12m/s.what is the centripetal force acting on the Bob .if the speed of the Bob is5m/s Calculate the tension of the string.?
*Monday, September 28, 2015 by angel varghesh*

**Physics**

I am in 8th Grade G/T Science, and I had a question in an online test I didn't understand: An object is traveling at 8.1 m/s. Over the course of 5.3 seconds, it accelerates at a rate of 2.8 m/s2. What is its final velocity (in m/s)? Can you please help me answer this ...
*Monday, September 28, 2015 by Meher*

**physics**

a 12uc test charge was placed 20cm from a source of an electric field. There was a measured force of 0.6N acting on the test charge. What is the strength of the electric field measured by the test charge??
*Monday, September 28, 2015 by ashley*

**Physics**

Jogger A, with a mass of 55kg, is traveling 6.00m at 3.45 m/s in the positive x-direction. Jogger B, with a mass of 62kg, is traveling 3.00m at 4.23 m/s in the positive x-direction. Jogger C, with a mass of 72kg, is traveling 5.00m in the negative x-direction at 4.75 m/s . ...
*Monday, September 28, 2015 by Cristian*

**physics**

A block of mass M rests on a block of mass M1 = 5.00 kg which is on a tabletop. A light string passes over a frictionless peg and connects the blocks. The coefficient of kinetic friction mk at both surfaces equals 0.330. A force of 60.0 N pulls the upper block to the left and ...
*Monday, September 28, 2015 by Anonymous*

**physics**

A boy moves 5km eastward and then change his direction towards westward in 4km.calculate his resultant displacement
*Monday, September 28, 2015 by olamide*

**Physics**

6. A car traveling 64 km/hr (40 mi/h) brakes suddenly to avoid a dog crossing the road. It accelerated at a rate of -1350 mi/h2. What was its speed after 0.5 min?
*Monday, September 28, 2015 by Claire*

**Physics**

A small crack occurs at the base of a 13.5 m high dam. The effective crack area through which water leaves is 1.55 10-3 m2. (a) Ignoring viscous losses, what is the speed of water flowing through the crack?
*Monday, September 28, 2015 by Anonymous*

**Physics**

A small crack occurs at the base of a 13.5 m high dam. The effective crack area through which water leaves is 1.55 10-3 m2. (a) Ignoring viscous losses, what is the speed of water flowing through the crack?
*Monday, September 28, 2015 by Anonymous*

**Physics**

A small crack occurs at the base of a 13.5 m high dam. The effective crack area through which water leaves is 1.55 10-3 m2. (a) Ignoring viscous losses, what is the speed of water flowing through the crack?
*Monday, September 28, 2015 by Anonymous*

**physics**

A 8.74-kg hanging weight m2 is connected by a string over a pulley to a 5.00-kg block m1 that is sliding on a flat table. If the coefficient of kinetic friction is 0.190, find the tension in the string.
*Monday, September 28, 2015 by lucas*

**Physics**

A 124-kg balloon carrying a 22-kg basket is descending with a constant downward velocity of 25.2 m/s A 1.0-kg stone is thrown from the basket with an initial velocity of 11.7 m/s perpendicular to the path of the descending balloon, as measured relative to a person at rest in ...
*Monday, September 28, 2015 by Anonymous*

**physics**

Two racing boats set out from the same dock and speed away at the same constant speed of 119 km/h for half an hour (0.500 h), the blue boat headed 26.8° south of west, and the green boat headed 41.4° south of west. During this half-hour (a) how much farther west does ...
*Monday, September 28, 2015 by molly*

**Physics**

A car travels 3.0km due south and then 4.0km due west.what is it displacement from the starting point? A)8km B)5km C)52km D)15km i think it is B
*Monday, September 28, 2015 by Kazekage carter kumo*

**Physics**

Please answer my question
*Monday, September 28, 2015 by Kazekage carter kumo*

**Physics**

A car travels 3.0km due south and then 4.0km due west.what is it displacement from the starting point?
*Monday, September 28, 2015 by Kazekage carter kumo*

**Physics **

A child rides a toboggan down a hill that descends at an angle of 15.5◦ to the horizontal. The hill is 48.1 m long. What is the vertical component of the child’s displacement? Answer in units of m.
*Monday, September 28, 2015 by Lal *

**Physics **

A skier speeds down a smooth ski slope which is at an angle of θ = 21° with the horizontal. The mass of the skier is 75 kg. Take the downhill direction to be positive and uphill to be negative. What is the net force acting on the skier? Ok, so I have set up these ...
*Monday, September 28, 2015 by Anna*

**2nd Law Physics**

You fashion a sling shot with a rather long and wide rubber band and practice hurling pebbles. You pull back on the center of the band with a force of 2.31 N. The angle between the two halves is 107°. What is the tension in the band? I get the gist of setting up Newton'...
*Monday, September 28, 2015 by Anna*

**Honors physics **

A person walks 24.0◦ north of east for 3.24 km. Another person walks due north and due east to arrive at the same location. How large is the east component of this second path? How large is the north component of this second path? Answer in units of km.
*Monday, September 28, 2015 by Lal *

**Honors Physics 1**

When the Sun is directly overhead, a hawk dives toward the ground at a speed of 4.26 m/s. If the direction of his motion is at an angle of 35.7◦ below the horizontal, calculate the speed of his shadow along the ground. Answer in units of m/s.
*Monday, September 28, 2015 by Lal *

**physics**

if a car moves 12km North, 19km East, and 12km South, a) Find the total distance covered. b) Find the car's displacement.
*Monday, September 28, 2015 by tracy*

**Physics**

Hi. Can someone please help me on how to do the propagation of error in physics on variable C, d and A of the following formula: k = Cd/åA , with error on C, d, A
*Monday, September 28, 2015 by NONEE*

**Physics**

How do I calculate the upper limit and lower limits in order to obtain F(max)and F(min)for the problem below. Using the force F = (1/2)CApv^2 on the car due to air friction. Consider a car with front cross-sectional area of A=(1.77 ± 0.02)m^2 and a drag coefficient of C...
*Monday, September 28, 2015 by NONEE*

**AP Physics**

A car enters the freeway with a speed of 6.9 m/s and accelerates uniformly for 2.7 km in 3,7 min. How fast is the car moving after this time? Answer in units of m/s.
*Monday, September 28, 2015 by Natasha*

**physics**

The potential energy (in J) of a system in one dimension is given by:2 3 U(x) = 5 − x + 3x − 2xWhat is the work done in moving a particle in this potential from x = 1 m to x = 2 m? Whatis the force on a particle in this potentialat x = 1 m and x = 2 m? Locate the ...
*Sunday, September 27, 2015 by freddy*

**AP Physics**

A car enters the freeway with a speed of 6.9 m/s and accelerates uniformly for 2.7 km in 3,7 min. How fast is the car moving after this time? Answer in units of m/s.
*Sunday, September 27, 2015 by Natasha*

**Physics**

In the figure below the left-hand cable has a tension T1 and makes an angle of 45 ◦ with the horizontal. The right-hand cable has a tension T3 and makes an angle of 48 ◦ with the horizontal. A W1 weight is on the left and a W2 weight is on the right. The cable ...
*Sunday, September 27, 2015 by Josh*

**physics**

the magnitude of vector A is 35 units and points in the direction 325 degrees counterclockwise from the positive X-axis. calculate the X and y components of the vector
*Sunday, September 27, 2015 by nelson*

**Physics-Urgent**

A sign with a mass of 23 kg is hanging in two wires both making an angle of 27 degrees with the vertical. Find the tension in one of the wires. Give your answer in newtons (N) and with 3 significant figures.
*Sunday, September 27, 2015 by Anonymous*

**Physics **

A projectile is fired at 12.5 m/s at an angle of 53.1 with the horizontal from a point 75m above the ground. A) How long does it take to reach the ground? B)What max height does it reach? C) What horizontal distance does it travel before striking the ground? D) With what ...
*Sunday, September 27, 2015 by Kitty*

**Physics, math**

What is the answer to this? I don't understand how to solve it. 1.2 = 4.6 tan 50 - 4.9 (4.6^2)/(x^2 cos^2 50)
*Sunday, September 27, 2015 by Taylor*

**Physics**

A basketball player shoots a free throw at a 50 degree angle. Assume the ball is released at a height of 1.8 meters, the hoop is 3 meters off of the floor and 4.6 meters away from the shooter. With what velocity should the player release the ball to hit nothing but net? I have...
*Sunday, September 27, 2015 by Taylor*

**science- physics**

A car is traveling at a steady 90 km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a steady 7.3 m/s/s.How much time elapses before the motorcycle is moving as fast as the car? How far is the motorcycle from the car when it...
*Sunday, September 27, 2015 by Laura*

**Physics**

A basketball player shoots a free throw at a 50 degree angle. Assume the ball is released at a height of 1.8 meters, the hoop is 3 meters off of the floor and 4.6 meters away from the shooter. With what velocity should the player release the ball to hit nothing but net?
*Sunday, September 27, 2015 by Taylor*

**Physics**

A fireman d = 33.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of θi = 21.0° above the horizontal as shown in the figure. If the speed of the stream as it leaves the hose is vi = 40.0 m/s, at what height will the ...
*Sunday, September 27, 2015 by James*

**physics**

Shoes made for the sports of bouldering and rock climbing are designed to provide a great deal of friction between the foot and the surface of the ground. Such shoes on smooth rock might have a coefficient of static friction of 1.2 and a coefficient of kinetic friction of 0.90...
*Sunday, September 27, 2015 by xxx*

**physics**

a body is at equlibrium under the action of three forces.one force is 10n acting due east and one is 5n in the direction 60degree north east.what is the magnitude and direction of the third force.
*Sunday, September 27, 2015 by mfoniso*

**physics**

if a girl walks 30m northwards from point A-B and then 40m eastwards to point C.What is her total displacement and distance?
*Sunday, September 27, 2015 by christain*

**Physics**

To ward off oceanic invaders, a cannon is placed 10 meters from the water's edge, pointing out at sea. The cannon is capable of firing a projectile at a maximum velocity of 100m/s. a) what is the maximum firing range of the cannon? b)If the cannon was placed on a cliff ...
*Sunday, September 27, 2015 by :(*

**Physics**

A rifle bullet, traveling at "v1" strikes a large tree an penetrates to a depth of "d". the mass of the bullet is "m". assume the de-acceleration is constant as it penetrates the tree. a) the time required to stop. b) the de-acceleration of the ...
*Sunday, September 27, 2015 by John*

**physics**

A quarterback takes the ball from the line of scrimmage, runs backwards for 9.0 yards, then runs sideways parallel to the line of scrimmage for 17.0 yards. At this point, he throws a 46.0-yard forward pass straight downfield, perpendicular to the line of scrimmage. What is the...
*Sunday, September 27, 2015 by Anonymous*

**physics **

NASA launches a satellite into orbit at a height above the surface of the Earth equal to the Earth's mean radius. The mass of the satellite is 550 kg. (Assume the Earth's mass is 5.97 1024 kg and its radius is 6.38 106 m.) (a) How long does it take the satellite to go ...
*Sunday, September 27, 2015 by Kristen *

**Physics**

Two charges are placed on the x axis. One of the charges (q1 = +5.44C) is at x1 = +3.00 cm and the other (q2 = -27.7C) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x = +6.00 cm.
*Sunday, September 27, 2015 by Anonymous*

**Physics**

A uniform electric field exists everywhere in the x, y plane. This electric field has a magnitude of 5600 N/C and is directed in the positive x direction. A point charge -9.6 × 10-9 C is placed at the origin. Find the magnitude of the net electric field at (a) x = -0.20 ...
*Sunday, September 27, 2015 by Anonymous*

**Physics**

A mover has to move a heavy sofa of mass 146 kg to the second floor of the house. He uses a rope to pull the sofa up a ramp from the first to the second floor. As he pulls the sofa he makes sure that the rope is parallel to the surface of the ramp which is at 30.0° to the ...
*Sunday, September 27, 2015 by Anna*

**physics **

a mass of 15kg was suspended from a ceiling is pulled aside with a horizontal force,F, calculate the value of tension, T. (g=10m/s)
*Sunday, September 27, 2015 by prince *

**Physics**

The figure below represents part of the performance data of a car owned by a proud physics student. (The horizontal axis is marked in increments of 1 s and the vertical axis is marked in increments of 10 m/s.) f (a) Calculate the total distance traveled by computing the area ...
*Sunday, September 27, 2015 by Kaleem*

**Physics**

A concrete sidewalk is constructed between two buildings on a day when the temperature is 25 0C. The sidewalk is 6 m long and consists of two slabs each 3 m in length and of negligible thickness. What would be amount of buckling (displacement) upwards that will occur in the ...
*Sunday, September 27, 2015 by Pam*

**physics **

if two forces 10N and 20N are inclined at angle 60degree to each other. Find the resultant force.
*Sunday, September 27, 2015 by John*

**Physics**

An automobile uniformly accelerates from rest at 15 ft/s2 for 6s. What is the fanal velocity in ft/s? v=d/t 15 *6= 90 90ft/s
*Sunday, September 27, 2015 by RP*

**physics**

A man walks 30km east ward and 35km north ward what is the resultant displacement of the man,as well as his direction
*Sunday, September 27, 2015 by chika nsitem*

**Physics**

How do I calculate the upper limit and lower limits in order to obtain F(max)and F(min)for the problem below. Using the force F = (1/2)CApv^2 on the car due to air friction. Consider a car with front cross-sectional area of A=(1.77 ± 0.02)m^2 and a drag coefficient of C...
*Sunday, September 27, 2015 by NONEE*

**physics - engine**

A car V8 has a bore of 4 in. and a stroke of 2.5 in., what is the engine size?
*Saturday, September 26, 2015 by kim*

**Physics**

A 41 kg child sits in a swing supported by two chains, each 1.4 m long. If the tension in each chain at the lowest point is 261 N, find the child’s speed at the lowest point. (Neglect the mass of the seat.) Find the force of the seat on the child at the lowest point.
*Saturday, September 26, 2015 by Maddie*

**Physics**

Forces of 10.3N north, 19.5N east, and 15.2N south are simultaneously applied to a 4.06kg mass as it rests on an air table. What is the magnitude of its acceleration?
*Saturday, September 26, 2015 by King*

**Physics**

A rock is projected vertically upward with a velocity of 58.0 m/s. How many metres will it pass over in the third second of its upward travel ?
*Saturday, September 26, 2015 by Mike*

**Physics**

The slab of steel shown below is being lifted at 0.50 m/s. It weighs 1.91×103N. If the angle θ equals 61.4 degrees, what is the tension in each cable?
*Saturday, September 26, 2015 by Jack*

**PHYSICS**

1.)what is the magnitude of the force experienced by a proton moving at 3 km/s inside magnetic field of strength 0.05T 2.)an electron is moving at 2x10^5 m/s through a uniform magnetic field of 1.4x10^-3 T.what is the magnitude of magnetic force if the velocity of the electron...
*Saturday, September 26, 2015 by Anonymous*

**PHYSICS**

1.)what is the magnitude of the force experienced by a proton moving at 3 km/s inside magnetic field of strength 0.05T 2.)an electron is moving at 2x10^5 m/s through a uniform magnetic field of 1.4x10^-3 T.what is the magnitude of magnetic force if the velocity of the electron...
*Saturday, September 26, 2015 by Slow*

**Physics**

A sound wave travels a distance 1020 m in 5 minutes. If the length of the three successive crests is 15 m, then calculate the wave speed. "Length of three crests"? I'm not sure about that. Is the question okay? I'm confused. :/
*Saturday, September 26, 2015 by Kip*

**University physics**

Hi. Can someone please help me on how to perform error analysis on the formulas: r = 1/C, with an error on C.
*Saturday, September 26, 2015 by NONEE*

**physics**

Consider a carwith front cross-sectional area of A=(1.77 ± 0.02)m^2 and a drag coefficient of C=(0.38±-0.02) moving with a speed of v=(10.0±0.5)m/s. Suppose that the density of air is p=1.20 kg/m^3 at the sea level. 1.Calculate the force F=(1/2)CApv^2 on ...
*Saturday, September 26, 2015 by NONEE*

**physics**

Perform error analysis on the following formulas: (a)∆ = áô, with errors á on and ô (b)r = 1/C, with an error on C (c)r = 1/n, with an error on n (d)k = Cd/åA , with errors on C, d and A
*Saturday, September 26, 2015 by nonee*

**Physics**

A 124-kg balloon carrying a 22-kg basket is descending with a constant downward velocity of 25.2 m/s A 1.0-kg stone is thrown from the basket with an initial velocity of 11.7 m/s perpendicular to the path of the descending balloon, as measured relative to a person at rest in ...
*Friday, September 25, 2015 by daniela*

**physics**

Consider a carwith front cross-sectional area of A=(1.77 ± 0.02)m^2 and a drag coefficient of C=(0.38±-0.02) moving with a speed of v=(10.0±0.5)m/s. Suppose that the density of air is p=1.20 kg/m^3 at the sea level. Make a table showning the forces due to ...
*Friday, September 25, 2015 by Megameno*

**physics**

Consider a carwith front cross-sectional area of A=(1.77 ± 0.02)m^2 and a drag coefficient of C=(0.38±-0.02) moving with a speed of v=(10.0±0.5)m/s. Suppose that the density of air is p=1.20 kg/m^3 at the sea level. calculate the force F=(1/2)CApv^2 on the...
*Friday, September 25, 2015 by Megameno*

**physics**

A novice golfer on the green takes three strokes to sink the ball. The successive displacements are 3.6 m to the north, 2.8 m 45◦ north of east, and 2.2 m 59◦ west of south. Starting at the same initial point, an expert (lucky) golfer could make the hole in a ...
*Friday, September 25, 2015 by shannon*

**physics**

A knight sits on a castle wall during a siege.To while away the time, he notes that boulders catapulted from below land on the top of his wall with a vertical velocity of 9.9 m/s. If he is 35 m above the catapult, what is the initial velocity of the boulders? Theacceleration ...
*Friday, September 25, 2015 by zach*

**physics**

A ball is thrown straight up and reaches a maximum height of 7.16 m. What was its initial speed? The acceleration of gravity is 9.8 m/s Answer in units of m/s.
*Friday, September 25, 2015 by zach*