Popular questions
  1. physics

    A 10uf capacitor is charged from a 30v supply and then connected across an uncharged 50uf capacitor.Calculate a. The final potential difference across the combination b. The final and initial energies

    asked by Gift on October 18, 2016
  2. physics

    The electric field in a region is given by E=ayi + axj, where a= 2V/m^2 is a constant. What is the electric potential difference between the origin and the point x= 1m, y= 2m? Do I use the formula E= - deltaV= - (V/x)i+(V/y)j+(V/z)k)?

    asked by Jessica on February 28, 2008
  3. Physics

    Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 402 N and F2 = 364 N. (Assume up and to the right as positive directions.)(F1 is 10degrees and F2 is 30degrees) (a) What is the resultant of these two

    asked by Dani on May 3, 2011
  4. Physics

    A 0.28-kg stone is held 1.5 m above the top edge of a water well and then dropped into it. The well has a depth of 4.8 m. (a) Taking y = 0 at the top edge of the well, what is the gravitational potential energy of the stone–Earth system before the stone

    asked by Anonymous on September 27, 2011
  5. 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

    asked by Anonymous on January 24, 2015
  6. Physics

    Suppose a monatomic ideal gas is changed from state A to state D by one of the processes shown on the PV diagram. Find the total work done on the gas if it follows the constant temperature path A-C followed by the constant pressure path C-D. A = 2atm and

    asked by Dan on December 6, 2010
  7. physics

    The length of a sonometer wire AB is 100cm where should the two bridges be placed from A to divide the wire in 3 segments whose fundamental frequencies are in the ratio of 1:2:6 options: 1.60cm,90cm 2.40cm,80cm

    asked by srikala on May 29, 2012
  8. Physics

    A 1000N crate is being pushed across a level floor at a constant speed by a force F of 300N at an angle of 20.0 degrees. (a) What is the coefficient of kinetic friction between the crate and the floor? (b) If the 300-N force is instead pulling the block at

    asked by DROSP on November 14, 2013
  9. Physics

    Thanks for any help :) Four 20 ohm resistors are connected in parallel and the combination is connected to a 20V emf device. The current is: A) 0.25A B) 1.0 A C) 4.0 A D) 5.0 A E) 100 E Parallel circuits: I know that the voltage is 20V and the Resistance

    asked by susane on March 15, 2007
  10. physics

    Find the net torque on the wheel in the figure below about the axle through O perpendicular to the page, taking a = 11.0 cm and b = 23.0 cm. (Indicate the direction with the sign of your answer. Assume that the positive direction is counterclockwise.)

    asked by Anonymous on April 30, 2012
  11. Physics

    A helicopter is ascending vertically with a speed of 5.20 m/s. AT the height of 125m above the earth, a package is dropped from a window.How much time does it take for the package to reach the ground. ****Note: Please show the steps.

    asked by Bunty on September 15, 2007
  12. Physics

    A 1000 kg car pushes a 2000 kg truck that has a dead battery. When the drive steps on the accelerator, the drive wheels of the car push against the ground with a force of 4500 N. a) What is the magnitude of the force of the car on the truck? b) what is the

    asked by Sarah on June 12, 2010
  13. physics

    A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle. The magnitude of the force applied by each rope is 2900 newtons (N). (a) How much force

    asked by will on June 28, 2013
  14. Physics

    If a man weighs 900 N on the earth, what would he weigh on jupiter, where acceleration due to gravity is 25.9 m/s^2?

    asked by Godwin on August 7, 2015
  15. Physics

    Now assume that the pitcher in Part D throws a 0.145-kg baseball parallel to the ground with a speed of 32 m/s in the +x direction. The batter then hits the ball so it goes directly back to the pitcher along the same straight line. What is the ball's

    asked by Eden on October 24, 2010
  16. physics

    The melting point of a solid is 90.0 d/C. What is the heat required to change 2.5 kg of this solid at 40.0 d/C to a liquid? The specific heat of the solid is 390 J/kg-K and its heat of fusion is 4000 J/kg. I got 2 different answers 2 different ways:

    asked by Jon on April 3, 2008
  17. Physics

    While working on her bike, Amanita turns it upside down and gives the front wheel a counterclockwise spin. It spins at approximately constant speed for a few seconds. During this portion of the motion, she records the x and y positions and velocities, as

    asked by Sam on August 19, 2012
  18. physics

    a 10-kg block on a perfectly smooth horizontal table is connected by a horizontal string to a 63-kg block that is hanging over the edge of the table. What is the magnitude of the acceleration of the 10-kg block when the other block is gently released?

    asked by Anonymous on March 6, 2015
  19. physics

    An apple crate with a weight of 225 N accelerates along a frictionless surface as the crate is pulled with a force of 14.5 N as shown in the drawing. What is the horizontal acceleration of the crate?

    asked by Tyler on January 8, 2017
  20. physics

    A 4.170 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is μs = 0.505 and the coefficient of kinetic friction is μk = 0.255. At time t = 0, a force F = 12.7 N is applied horizontally to the block.

    asked by ashley on October 25, 2012
  21. Physics

    A ball player catches a ball 3.33s after throwing it vertically upward. a) with what speed did he throw it? b) what height did it reach?

    asked by Daniela on January 30, 2014
  22. Physics

    A 15 kg block is on a ramp which is inclined at 20 degrees above the horizontal. It's connected by a string to a 19kg mass which hangs over the top edge of the ramp. With no frictional forces taken into account, what is the magnitude of the acceleration of

    asked by Ann on November 9, 2017
  23. physics

    a 20 kg loudspeaker is suspended 2m below a ceiling by two 3m-long cables that angle outward at equal angles. what is the tension in the cables?

    asked by sam on November 11, 2010
  24. Physics

    Two planes are about to drop an empty fuel tank. At the moment of release each plane has the same speed of 135 m/s, and each tank is at the same height of around 2.00km above the ground. Although the speeds are the same, the velocities are different at the

    asked by Anonymous on June 6, 2012
  25. Physics

    If 500 J of work are required to carry a charged particle between two points with a potential difference of 40V, the magnitude of the charge on the particle is: a) 0.040 C b) 12.5 C c) 20C D) cannot be computed unless the path is give e) none of these My

    asked by susane on March 12, 2007
  26. Physics

    A spring-loaded toy gun is used to shoot a ball of mass m=1.5 kg straight up in the air. The spring has spring constant k=667 N/m. If the spring is compressed a distance of 25.0 centimeters from its equilibrium position and then released, the ball reaches

    asked by Eden on October 17, 2010
  27. Physics

    Block 1, of mass m1 = 0.650kg , is connected over an ideal (massless and frictionless) pulley to block 2, of mass m2, as shown. For an angle of θ = 30.0∘ and a coefficient of kinetic friction between block 2 and the plane of μ = 0.400, an acceleration

    asked by Joe on October 3, 2013

    A 900 kg car pushes a 1900 kg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push against the ground with a force of 4800 N. (a) What is the magnitude of the force of the car on the truck? (b) What is

    asked by Kate on June 21, 2011
  29. physics

    A block of mass m1=3.70kg on a frictionless plane inclined at angle 30 deg is connected by a cord over a massless, frictionless pulley to a second block mass m2= 2.30kg. What is... a) The magnitude of the acceleration of each block? b) The direction of the

    asked by Maryam on January 12, 2016
  30. physics

    A traveler pulls on a suitcase strap at an angle 36 above the horizontal. If 555 J of work are done by the strap while moving the suitcase a horizontal distance of 15 m, what is the tension in the strap?

    asked by Anonymous on October 27, 2014
  31. physics

    A chair of weight 150 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 38.0 directed at an angle of 41.0 below the horizontal and the chair slides along the floor.Using Newton's laws, calculate , the

    asked by Mary on September 23, 2009
  32. Physics

    A 140 g baseball is dropped from a tree 15.5 m above the ground. With what speed would it hit the ground if air resistance could be ignored? If it actually hits the ground with a speed of 8.00 m/s, what is the magnitude of the average force of air

    asked by Kensey on June 18, 2012
  33. physics

    An 8 g bullet is shot into a 4.0 kg block, at rest on a frictionless horizontal surface. The bullet remains lodged in the block. The block moves into a spring and compresses it by 3.7 cm. The force constant of the spring is 2500 N/m. In the figure, the

    asked by Georgey on March 31, 2014
  34. Physics

    A truck travels due east for a distance of 1.7 km, turns around and goes due west for 7.1 km, and finally turns around again and travels 3.5 km due east. What is the total distance that the truck travels? What are the magnitude and direction of the truck's

    asked by Arielle on October 16, 2013
  35. physics

    A flywheel of moment of inertia 0.32 kgm^2 is rotated steadily at 120rad/s by a 50 W electric motor. (i)find the kinetic energy and angular momentum of the flywheel. (ii) calculate the value of frictional couple opposing the rotation. (iii)find the time

    asked by Edwin on March 26, 2010
  36. Physics

    In the absence of air resistance, a projectile is launched from and returns to ground level. It follows a trajectory similar to that in the figure below and has a range of 15 m. Suppose the launch speed is doubled, and the projectile is fired at the same

    asked by Anonymous on September 18, 2012
  37. Physics

    A) A 600 kg steel beam is supported by the two ropes shown in (Figure 1). Calculate the tension in the rope. Express your answer to two significant figures and include the appropriate units. B) The rope can support a maximum tension of 3200 N . Is this

    asked by PSS on November 11, 2015
  38. Physics

    A 6.0kg box is on a frictionless 45∘ slope and is connected via a massless string over a massless, frictionless pulley to a hanging 2.4kg weight. What is the tension in the string if the 6.0kg box is held in place, so that it cannot move? If the box is

    asked by Physics Help on May 16, 2014
  39. 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

    asked by nelson on September 27, 2015
  40. physics

    While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 6.93 m/s. The stone subsequently falls to the ground, which is 17.1 m below the point where the stone leaves your hand. At what speed does the stone

    asked by unknwon on October 10, 2014
  41. Physics

    A 60.0 kg person rides in elevator while standing on a scale. The elevator has an acceleration 2.00 m/s^2 upward. What is the reading on the scale?

    asked by Anonymous on October 10, 2014
  42. physics

    A 70-kg fisherman in a 138-kg boat throws a package of mass m = 15 kg horizontally toward the right with a speed of vi = 4.8 m/s as in the figure below. Neglecting water resistance, and assuming the boat is at rest before the package is thrown, find the

    asked by Taylor on March 27, 2012
  43. physics

    During the first 18 minutes of a 1.0-hour trip, a car has an average speed of 11 m/s. What must the average speed of the car be during the last 42 minutes of the trip be if the car is to have an average speed of 21 m/s for the entire trip?

    asked by thaokieu on January 30, 2011
  44. Physics

    There are two forces on the 2.36 kg box in the overhead view of Fig. 5-31 but only one is shown. For F1 = 18.6 N, a = 11.4 m/s2, and θ = 26.7°, find the second force (a) in unit-vector notation and as (b) a magnitude and (c) a direction. (State the

    asked by Anonymous on September 28, 2011

    A car is traveling up a hill that is inclined at an angle θ above the horizontal. Determine the ratio of the magnitude of the normal force to the weight of the car when (a) θ = 15o and (b) θ = 32o.

    asked by Anonymous on October 4, 2015
  46. Physics

    A 69.5kg football player is gliding across very smooth ice at 2.15m/s . He throws a 0.470kg football straight forward. A) What is the player's speed afterward if the ball is thrown at 16.0m/s relative to the ground? B) What is the player's speed afterward

    asked by David on May 27, 2014
  47. physics

    How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 95-m at a speed of 80 km/h.

    asked by Anonymous on February 7, 2010
  48. Physics

    A soccer ball kicked on a level field has an initial vertical velocity component of 15 meters per second. Assuming the ball lands at the same height from which it was kicked, what is the total time the ball is in the air? [Neglect friction.]

    asked by Shannon on November 14, 2012
  49. physics

    A 10 cm by 10 cm by 10 cm wood block with a density of 700 kg/m^3 floats in water. a. What is the distance from the top of the block to the water if the water is fresh? b. If it's seawater?

    asked by luma on January 25, 2016
  50. Physics

    In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 4.3 m/s at an angle of 15 degrees below the horizontal. It is released 0.80m above the floor. What horizontal distance does the ball cover

    asked by Priscilla on February 22, 2012
  51. Physics

    An 8.00 g bullet is fired into a 250 g block that is initially at rest at the edge of a table of 1.00 m height (Fig. P6.26). The bullet remains in the block, and after the impact the block lands 2.00 m from the bottom of the table. Determine the initial

    asked by having trouble on November 21, 2010
  52. Physics

    Problem 2- A 350 kg roller coaster starts from rest at point A and slides down the frictionless loop-the-loop shown in the figure. a) How fast is the roller coaster moving at point B? b) How hard does it press against the track at point B?

    asked by Anonymous on December 12, 2013
  53. physics

    Use R = 8.2 × 10–5 m3 atm/mol K and NA = 6.02 × 1023 mol–1. The approximate number of air molecules in a 1 m3 volume at room temperature (300 K) and atomospheric pressure is:

    asked by sam on June 24, 2009
  54. physics

    A 65 kg skier speeds down a trail, as shown in Figure 5-24. The surface is smooth and inclined at an angle of θ = 20° with the horizontal. (a) Draw a free-body diagram for the skier. (Do this on paper. Your instructor may ask you to turn in this

    asked by amy on January 13, 2010
  55. Physics

    While sitting on a tree branch 11m above the ground, you drop a chestnut. When the chestnut has fallen 2.7m , you throw a second chestnut straight down. What initial speed must you give the second chestnut if they are both to reach the ground at the same

    asked by Anonymous on August 10, 2014
  56. Physics

    A cylinder is fitted with a piston, beneath which is a spring, as in the drawing. The cylinder is open at the top. Friction is absent. The spring constant of the spring is 4100 N/m. The piston has a negligible mass and a radius of 0.023 m. (a) When air

    asked by Mary on April 24, 2007
  57. physics

    An object dropped from a cliff falls with a constant acceleration of 10m/s2. Find its speed 2s after it was dropped? Solution:Given ,accelaration =10m/s time=2s speed=? therfore,speed=distance travelled\total time taken s=10\2=5(ans) . is it ok.

    asked by Shalini on June 22, 2014
  58. Physics

    Hot air balloons float in the air because of the difference in density between cold and hot air. In this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. To do this, use the following variables

    asked by Jenny on July 13, 2011
  59. physics

    A 10 ohms resistor has a constant current. If 1200C of charge flow through it in 4 minutes what is the value of the current? A) 3.0 A B) 5.0 A C) 11 A D) 15 A E) 20 A ok I used the I=Q/t, 1200C/240s to get 5A which is an answer. You said I was right but

    asked by susan on March 14, 2007
  60. physics

    Consider three point charges arranged along the x axis. Charge q1 = -4.90 nC is located at x= 0.240 m and charge q2 = 2.30 nC is at x= -0.340 m . A positive point charge q3 is located at the origin. -Calculate the value of q3 such that the net force on

    asked by cello on June 7, 2020
  61. physics

    A rifle with weight of 30N fires a 5.0g bullet with a speed of 300ms^-1. a) Find the recoil speed of the rifle. b) if a700N man holds the rifle firmly against his shoulder, find the recoil speed of man and rifle.

    asked by saima on January 7, 2015
  62. physics

    An object with mass m1=5.00 kg rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2= 10.0 kg. Find the acceleration of each object and the tension in the cable.

    asked by Dee on September 26, 2011
  63. Physics

    Each tire on a car has a radius of 0.330 m and is rotating with an angular speed of 19.5 revolutions/s. Find the linear speed v of the car, assuming that the tires are not slipping against the ground.

    asked by Jasmin on October 24, 2011
  64. Physics

    Workers have loaded a delivery truck in such a way that its center of gravity is only slightly forward of the rear axle. .63m in front of the rear wheels and 2.3m behind the front wheels. The mass of the truck and its contents is 9155 kg. Find the

    asked by shai on November 25, 2010
  65. Physics

    A 3.00-kg block starts from rest at the top of a 25.5° incline and slides 2.00 m down the incline in 1.75 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the

    asked by Anonymous on October 23, 2013
  66. physics

    The meter stick in the drawing can rotate about an axis located at the 20.0-cm mark. The axis is perpendicular to the screen. A force F acts at the left end; the force is perpendicular to the meter stick and has a magnitude of 175 N. A second force, either

    asked by alice on February 11, 2011

    A 5.00-kg box slides 7.00 m across the floor before coming to rest. What is the coefficient of kinetic friction between the floor and the box if the box had an initial speed of 3.00 m/s?

    asked by Maria on March 18, 2014
  68. Physics

    Two blocks of masses m1 = 2.00 kg and m2 = 3.70 kg are each released from rest at a height of h = 5.60 m on a frictionless track, as shown in the figure below, and undergo an elastic head-on collision. (Let the positive direction point to the right.

    asked by Jessica on October 29, 2012
  69. physics

    A space station, in the form of a wheel 110 m in diameter, rotates to provide an "artificial gravity" of 3.00 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of rotation of the wheel (in revolutions per minute) that will

    asked by laura on July 10, 2010
  70. physics

    Two blocks are placed at the ends of a horizontal massless board, as in the drawing. The board is kept from rotating and rests on a support that serves as an axis of rotation. The block on the right has a mass of 5.4 kg. Determine the magnitude of the

    asked by genius girl on January 6, 2015
  71. Physics

    Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 90.7 N, Jill pulls with 89.1 N in the northeast direction, and Jane pulls to the southeast with 175 N. (Since the donkey is involved with such uncoordinated people,

    asked by Brianna Mathis on September 15, 2012
  72. Physics

    A grasshopper leaps into the air from the edge of a cliff at a 50 degree angle. He reaches a maximum height 6.74 cm above the top of the cliff and travels a total horizontal distance of 1.06 m. How tall is the cliff and what is the initial speed of the

    asked by Sarah on June 12, 2015
  73. Physics

    A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.24 and the push imparts an initial speed of 3.8 m/s?

    asked by John on October 14, 2010
  74. physics

    If a car rolls gently(vo=0) off a vertical cliff, how long does it take to reach 85km/h?

    asked by john on September 13, 2010
  75. Physics

    A motorist travels 160km at 80km/hr and 160km at 100km/hr. What is the average speed of the motorist for this trip? I need the step by step solution because I didn't listen to ny teacher properly

    asked by Michael Lawrence Dureza on November 14, 2015
  76. Physics

    A rocket-powered hockey puck moves on a horizontal frictionless table. The figure below shows the graphs of vx and vy, the x- and y-components of the puck’s velocity. The puck starts at the origin. The graph of the X-velocity is v=8t cm/s and the

    asked by Eric on September 11, 2015
  77. Physics

    You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.5 m above the ground, and it is moving at a speed of 8.0 m/s. (a) How much time does it take for the tennis ball to reach its maximum height? (b) What is the

    asked by John on September 6, 2014
  78. physics

    how many litres of 15%(mass/volume)sugar solution would it take to get 75g of sugar?

    asked by Charika jakhar on August 15, 2014
  79. physics

    Two capacitors of capacities c1=3uf and c2=6uf arranged in series are connected in a parallel with third capacitor c3=4uf. The arrangement is connected to a 6.0 V battery. Calculate the total energy stored in the capacitors.

    asked by shahbaz ahmad pala on October 5, 2015
  80. physics

    a ball is dropped from the top on an 80-m high building. what speed does the ball have in falling 3.5 s?

    asked by Katie on March 30, 2014
  81. physics

    A small mailbag is released from a helicopter that is descending steadily at 1.01 m/s. (a) After 4.00 s, what is the speed of the mailbag? v = m/s (b) How far is it below the helicopter? d = m (c) What are your answers to parts (a) and (b) if the

    asked by roger on August 30, 2012
  82. Physics

    1. While riding on an elevator descending with a constant speed of 1.5 m/s, you accidentally drop a book form under your arm. (a) How long does it take for the book to reach the elevator floor, 1.2 m below your arm? (b) What is your book's speed relative

    asked by Priscilla on February 19, 2012
  83. Physics

    A 1200 kg car pushes a 2100 kg truck that has a dead battery to the right. When the driver steps on the accelerator, the drive wheels of the car push against the ground with a force of 4500 N . What is the magnitude of the force the car applies to the

    asked by Help Physics college on November 1, 2011
  84. Physics

    Vector A is 2cm long and 60degree Above the x axis in first quadrant . Vector B is 2cm long and 60degree below the x axis in the fourth quadrant .the sum of vector A and B is a vector of magnitude.

    asked by Jayant on May 24, 2019
  85. physics

    The mass of the sled and its two riders in Figure 5.5 is 243 kg. Find the magnitude of the centripetal force that acts on the sled during the turn with a radius of (a) 33.0 m and (b) 24.0 m.

    asked by SS on October 20, 2014
  86. physics

    Two ice skaters stand facing each other at rest on a frozen pond. They push off against one another and the 48-kg skater acquires a speed of 0.65 m/s. If the other skater acquires a speed of 0.84 m/s, what is her mass?

    asked by mathew on September 29, 2014
  87. Physics

    A 50 g ball of clay traveling at speed v0 hits and sticks to a 1.0 kg block sitting at rest on a frictionless surface. A) What is the speed of the block after the collision? B) What percentage of the ball's initial energy is "lost"?

    asked by Trevor on June 2, 2014
  88. Physics

    On vacation, your 1300 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 2.02 m/s2. (a) What is the net force exerted by the car on the trailer? (b) What force does the trailer exert on the car? (c) What is the net force acting

    asked by tls on October 11, 2010
  89. Physics

    Four equal +6.00-μC point charges are placed at the corners of a square 2.00 m on each side. ( = 1/4π = 8.99 × 109 N · m2/C2) (a) What is the electric potential (relative to infinity) due to these charges at the center of this square?

    asked by X on May 27, 2013
  90. Physics

    Three particles have charges +20μC each.They are fixed at the corners of an equilateral triangle of side 0.5m .The force on each of particle has magnitude

    asked by Pooja on April 25, 2017
  91. physics

    Driving in your car with a constant speed of v= 22 m/s, you encounter a bump in the road that has a circular cross-section, as indicated in the figure (Figure 1) . Part A If the radius of curvature of the bump is 52 m, find the apparent weight of a 66-kg

    asked by alex on March 28, 2017
  92. physics

    It is possible to shoot an arrow at a speed as high as 100 m/s. (a) If friction is neglected, how high would an arrow launched at this speed rise if shot straight up? (b) How long would the arrow be in the air? Please help! I do not have any clue as to how

    asked by sarah on June 7, 2010
  93. physics

    You throw a baseball directly upward at time t = 0 at an initial speed of 13.3 m/s. What is the maximum height the ball reaches above where it leaves your hand? At what times does the ball pass through half the maximum height? Ignore air resistance and

    asked by Jordan on September 7, 2015
  94. physics

    A sports car moving at constant speed travels 120 m in 5.1 s. If it then brakes and comes to a stop in 4.0 s, what is its acceleration? Express the answer in terms of g's, where g = 9.80 m/s2. (Take the positive direction to be the direction of travel.)

    asked by Hal on August 18, 2011
  95. physics

    A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fail halfway to the ground is 1.2s. Find the time it takes for the ball to fall from rest all the way to the ground. Can anyone give me some

    asked by ajo on October 6, 2007
  96. Physics

    A cable exerts a constant upward tension of magnitude 1.82 ✕ 104 N on a 1.60 ✕ 103 kg elevator as it rises through a vertical distance of 2.90 m. Find the work done by the tension force on the elevator (in J). Find the work done by the force of gravity

    asked by Anonymous on October 12, 2018
  97. physics

    If I weigh 741 N on Earth at a place where g = 9.80 m/s2 and 5320 N on the surface of another planet, what is the acceleration due to gravity (in m/s2) on that planet?

    asked by Mazdaly on April 15, 2015
  98. Physics

    A rowboat crosses a river with a velocity of 3.30 mi/h at an angle 62.5° north of west relative to the water. The river is 0.795 mi wide and carries an eastward current of 1.25 mi/h. How far upstream is the boat when it reaches the opposite shore?

    asked by Dan on January 25, 2013
  99. physics

    major leaguer hits a baseball so that it leaves the bat at a speed of 29.0m/s and the angles of 36.9 above horizontal ignore resistance what two time is the baseball at a height of 10.0m above the point at which it left the bat? *what two times is the

    asked by deb on September 28, 2013
  100. physics

    starting from reast a boat increases its speed to 4.12 m/s with constant acceleration. (a) what is the boat's average speed? (b) If it take the boat 4.77s to reach this speed, how for has it traveled?

    asked by taylor on November 17, 2011