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March 2, 2015

Search: A rubber ball is dropped and bounces vertically from a horizontal concrete floor. If the ball has a speed of 3.3 m/s just before striking the floor and

Number of results: 58,347

physic
A ball is thrown toward a cliff of height h with a speed of 28m/s and an angle of 60∘ above horizontal. It lands on the edge of the cliff 3.3s later. a) How high is the cliff? i got -29.2 m but my answer is wrong b) What was the maximum height of the ball? im not sure ...
October 21, 2014 by sara

physics
A golf bounces down a flight of steel stairs, striking several steps on the way down, but never hitting the edge of a step. The ball starts at the top step with a vertical velocity component of zero. If all the collisions with the stairs are elastic, and if the vertical height...
October 5, 2009 by Treb

Physics
A 15.0 g rubber bullet hits a wall with a speed of 140 m/s. If the bullet bounces straight back with a speed of 125 m/s, what is the change in momentum of the bullet?
November 24, 2010 by Kelsey

Physics 103
You're squeezing a springy rubber ball in your hand. If you push inward on it with a force of 1 N, it dents inward 2 mm. How far must you dent it before it pushes outward with a force of 3 N?
September 24, 2014 by Molly

10th grade
A soccer player kicka a ball with an initial velocity of 10 meters per second at an angle of 30 degress above the horizontal. the magnitude of the horizontal component of the ball's initial velocity is
October 3, 2010 by elana

Physics
A basketball player is trying to make a half-court jump shot and releases the ball at the height of the basket. Assuming that the ball is launched at 51 degrees, 14.0 m from the basket what speed must the player give the ball? So far I found the Vy to be 8.55 m/s...but I don't...
November 16, 2009 by emm

stat probability
An apartment building has the following apartments: 2 bdrm 3 bdrm 4 bdrm 1st floor 7 3 4 2nd floor 9 0 11 3rd floor 8 4 7 If an apartment is selected at random, what is the probability that it is a 2 bedroom apartment on the 3rd floor?
April 8, 2013 by Lynn

Precal
Suppose that Tiger hit a golf ball with an initial velocity of 150 ft/sec at an angle of elevation of 30. Write the parametric equations to represent the flight of the ball. How long is the golf ball in the air? Determine the distance the ball traveled. When is the ball at ...
May 26, 2014 by jessica

physics
A wooden box weighing 281 N is pushed across the floor by a workman who exerts a horizontal force of 166 N. If the force of friction between the box and the floor is 21 N, what is the acceleration (in meters/second^2) of the box?
March 8, 2011 by nm

physics
wooden box weighing 271 N is pushed across the floor by a workman who exerts a horizontal force of 144 N. If the force of friction between the box and the floor is 28 N, what is the acceleration (in meters/second^2) of the box?
March 1, 2012 by Anonymous

physics
A wooden box weighing 271 N is pushed across the floor by a workman who exerts a horizontal force of 144 N. If the force of friction between the box and the floor is 28 N, what is the acceleration (in meters/second^2) of the box?
March 7, 2012 by phil

college physics
a tennis ball is thrown straight up with an initial velocity of 22.5 m/s. it is caught at the same distance above the ground. a). how long does it take to reach its maximum height? b). how high does the ball rise? c). at what speed does it hit the ground? d). what total length...
April 2, 2013 by confused

physics
A billiard ball of mass m = 0.250 kg hits the cushion of a billiard table at an angle of θ1 = 70.0 at a speed of v1 = 2.50 m/s. It bounces off at an angle of θ2 = 63.0 and a speed of v2 = 2.10 m/s.
April 2, 2014 by Anonymous

Algebra
A ball is thrown into the air. The height h, in feet, of the ball can be modeled by the equation h= -16t^2+20t+6, where t is the time, in seconds, the ball is in the air. When will the ball hit the ground? first should I use x= -b/2a?
June 6, 2013 by Casey

physics
Is it impossible to lose all of the kinetic energy in a collision? Or, does a ball which bounces several times before eventually coming to rest show how kinetic energy can completely disappear?
November 13, 2009 by Student

Physics
A 51.0 kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.710 and 0.440, respectively. (a) What horizontal pushing force is required to just start the crate moving? N (b) What horizontal pushing force is required to slide ...
September 17, 2007 by NHS

Physics...help please!
I fire a tennis ball from an air cannon, straight up from ground level, at initial speed v0. At the instant it reaches the top of its trajectory, I fire a second tennis ball at the same initial speed. Air resistance is negligible. At what fraction of the maximum height ...
February 11, 2011 by Cecille

Alg1
A baseball player hits a baseball into the outfield. The equation h= -0.005x^2 +x+3 give the path of the ball, where (h) is the height and (x) is the horizontal distance the ball travels. A. What is the equation of the axis of symmetry? It's -100 right? B. What is the Mac ...
October 20, 2011 by Adam

west chester university
A ball is thrown vertically upward, which is the positive direction. A little later it returns to its point of release. The ball is in the air for a total time of 8.26 s. What is its initial velocity? Neglect air resistance.
February 9, 2013 by kayla

physics
A man pulls a 10 kg box across a smooth floor with a force of 53 newtons at an angle of 18 degrees and for a distance of 122 meters. How much work, to the nearest joule, does he do?If the floor is angled upward at 6.7 degrees and the man pulls the box up the floor at constant ...
May 22, 2013 by blah physics

Outline
Fill in the blanks(which are numbered ) with t given words: A. Obstruction B. Cannot use hands C. Rules D. Conclusion E. Shielding the ball ___36___ A. Number of players 1.Eleven to a side B. Touching the ball 1. __37___ 2. May use hand to drop ball a. Cannot advance ball ...
July 8, 2012 by Amy

physics
A placemaker must kick a football from a point 36 m (about 39yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a velocity of 20.0 m/s at an angle 53 degrees to the horizontal. By how much does the ball ...
September 30, 2008 by mb

physics
A placemaker must kick a football from a point 36 m (about 39yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a velocity of 20.0 m/s at an angle 53 degrees to the horizontal. By how much does the ball ...
September 30, 2008 by mb

physics
A student finds that a stretched rubber band stores 3.5J of energy. She uses it to propel an object of mass 0.025kg vertically upwards. What will be the initial speed of the object? How high can it travel before coming momentarily to rest?
January 29, 2010 by Mota

physics
A basketball is thrown with a velocity of 10.5 ft/s downward from a height of 6.8 ft. The coefficient of restitution between the ball and the floor is 0.65. How high does the basketball go after its 2nd bounce?
November 25, 2010 by sandhu

physics
A basketball is thrown with a velocity of 10.5 ft/s downward from a height of 6.8 ft. The coefficient of restitution between the ball and the floor is 0.65. How high does the basketball go after its 2nd bounce?
November 25, 2010 by sandhu

Math 116
As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a) The sales representative here tells you they also have two floor plans available, but they only have 30 homes available. ...
March 21, 2010 by KiKi

science please check my answer
A boy climbs to the roof of his house and drops a 0.40 kg rubber ball from the 7.5-meter peak of the house. How much energy was lost in the process? So I got 48 J is this correct? The bounce takes place over a 170 ms time interval. What is the impulse given to the ball during ...
January 11, 2014 by Katie

Physics
A ball is thrown straight up from the ground with an initial velocity of 30.4 m/s; at the same instant, a ball is dropped from the roof of a building 21.1 m high. After how long will the balls be at the same height? The acceleration of gravity is 10 m/s2. Answer in units of s
January 28, 2012 by Kaleigh

Physics
A(n) 0.42 kg softball is pitched at a speed of 12 m/s. The batter hits it back directly at the pitcher at a speed of 27 m/s. The bat acts on the ball for 0.016 s. What is the magnitude of the impulse imparted by the bat to the ball? Answer in units of N s. What is the ...
February 1, 2015 by Monica

physics
A ball bearing is dropped from rest at a point A. At the instant it passes a mark 4.5 m below A, another ball bearing is released from rest from a position 5.5 m below A. 1) At what time after its release will the second ball bearing be overtaken by the first? 2) How far does ...
June 7, 2011 by tank

physics
If I threw a ball vertically at an initial speed of 34.5 m/s, how many seconds would it take to reach its maximum height?
September 27, 2011 by Anonymous

physics
A baseball is thrown vertically upward with a speed of 17.8 m/s from a height of 1.11 m. How high does the ball rise from its original position?
September 18, 2014 by Doug

physics
Three identical balls are thrown from a cliff of height, h, above a horizontal plane. One ball is thrown at an angle of 45 degrees above the horizon, the second is thrown horizontally, and the third is thrown at an angle of 30 degrees below the horizon (so, part of this ...
December 2, 2009 by William

physics
Three identical balls are thrown from a cliff of height, h, above a horizontal plane. One ball is thrown at an angle of 45 degrees above the horizon, the second is thrown horizontally, and the third is thrown at an angle of 30 degrees below the horizon (so, part of this ...
December 11, 2009 by Kelly

physics
A ball moving with a speed of 26 m/s strikes an identical ball that is initially at rest. After the collision, the incoming ball has been deviated by angle 1 = 50 from its original direction, and the struck ball moves off at angle 2 = 29 from the original direction (Fig. 9-...
March 9, 2011 by martin

physics
A football kicker can give the ball an initial speed of v_0 = 27.4 m/s. In order to score a field goal, the ball must go over the cross bar that is at a height of h = 3.44 m above the ground. If the kicker kicks the ball from a point d = 42.2 m from the goalposts, find the ...
March 1, 2014 by Ada

physics
A uniform 7.1 m tall aluminum ladder is leaning against a frictionless vertical wall. The ladder has a weight of 272 N. The ladder slips when it makes a 57.0degrees angle with the horizontal floor. Determine the coefficient of static friction between the ladder and the floor.
November 7, 2011 by PHYSICS HELP!!!!

physics101
A uniform 7.1 m tall aluminum ladder is leaning against a frictionless vertical wall. The ladder has a weight of 272 N. The ladder slips when it makes a 57.0degrees angle with the horizontal floor. Determine the coefficient of static friction between the ladder and the floor.
November 7, 2011 by physics

physics
to move a crate across a rough floor ,you push on it at an angle of 21degrees below the horizontal. find the force necessary to star the crate moving ,given that the mass of the crate is32kg and the coefficient of static friction between the crate and the floor is o.57.
February 5, 2012 by shadad

Physics
A bowling ball weighing 71.2 is attached to the ceiling by a 3.50 rope. The ball is pulled to one side and released; it then swings back and forth like a pendulum. As the rope swings through its lowest point, the speed of the bowling ball is measured at 4.20. 1)At that instant...
June 27, 2010 by Madeline

Physics
Tom the cat is chasing Jerry the mouse across the surface of a table 1.5 m above the floor. Jerry steps out of the way at the last second, and Tom slides off the edge of the table at a speed of 5 m/s. What is the Y of Tom's velocity when his velocity vector is pointing down at...
September 14, 2011 by Buddy

ap physics
hi i am not sure how to do this...thank you a man is going to pitch a ball. he moves the ball in a circular path of radius 0.6 m, constantly applying a force of 30N to the ball in the same direction as the ball's velocity along the circular path. at the highest point on the ...
November 7, 2010 by Appreciative student

Physics - Inelastic Collision ( check + help)
A billiard ball of mass 0.55kg moves with a velocity of 12.5m/s towards a stationary billiard ball of the identical mass and strikes it with a glancing blow. The first billiard ball moves of at an angle of 29.7deg clockwise from its original direction, with a velocity of 9.56m...
September 26, 2010 by Shaila

algebra
the distance traveled by the ball is given by D(t)=-5t^2+115t-110 (in feet) how far will the ball travel before it hits the ground?
February 3, 2013 by kat

Thermochemistry
Suppose a 0.17-kg billiard ball is rolling down a pool table with an initial speed of 4.5 m/s. As it travels, it loses some of its energy as heat. The ball slows down to 3.5 m/s and then collides straight-on with a second billiard ball of equal mass. The first billiard ball ...
October 30, 2009 by Kyle

Physics
1. A 3 kg block collides with a massless spring of spring constant 90 N/m attached to a wall. The speed of the block was observed to be 1.5 m/s at the moment of collision. The acceleration of gravity is 9.8 m/s^2. How far does the spring compress if the surface on which the ...
March 15, 2014 by mallak

physics
in apool game,a cue ball traveling at 0.75 m/s hits the stationary eight ball The eight ball moves with a velocity of 0.25 m/s at an angle of 37 deg reletive to the cue balls inital direction assuming that the collision is inelastic at what angle will the que be deflected and ...
February 4, 2008 by melissa

Physics
Its a beautiful winter day, and you and your friend are throwing around a 5 kg medicine ball on a very slippery frozen lake. You throw the ball toward your friend, and notice that you subsequently slide backwards with a speed of 1 m/s. If your mass is 60 kg, how fast did you ...
February 13, 2012 by Aaron

math
a ball is thrown into the air at a speed of 96 feet/sec. The equation that expresses the height of the ball as a function of time is: h(t) = -16t2 + 96t + 5 How long does the ball stay in the air after it is thrown? (Round answer to the hundreths of a second)
February 14, 2013 by Erin

Physics HW, Help Please
A 70.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. He catches the 0.430 kg ball precisely at the peak of his jump, when he is 19.2 inches off the ground. He hits the ground 1.61 inches away from where he leapt. If the ball ...
November 11, 2012 by Michael

physics
A box of books weighing 280 N is shoved across the floor of an apartment by a force of 390 N exerted downward at an angle of 35.1 below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57, how long does it take to move the box 4.00 m, starting...
October 13, 2009 by luc

physcis
A box of books weighing 330 N is shoved across the floor of an apartment by a force of 440 N exerted downward at an angle of 35.0 below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57, how long does it take to move the box 4.00 m, starting...
September 23, 2010 by Anonymous

Physics
A box of books weighing 290 N is shoved across the floor of an apartment by a force of 400 N exerted downward at an angle of 35.0 below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57, how long does it take to move the box 3.80 m, starting...
October 2, 2011 by Seth

physics
A box of books weighing 350 N is shoved across the floor of an apartment by a force of 460 N exerted downward at an angle of 35.0 below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57, how long does it take to move the box 3.80 m, starting...
February 24, 2013 by elana

physics
A box of books weighing 350 N is shoved across the floor of an apartment by a force of 460 N exerted downward at an angle of 35.0 below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57, how long does it take to move the box 3.80 m, starting...
February 24, 2013 by elana

Physics
A box of books weighing 290 N is shoved across the floor of an apartment by a force of 400 N exerted downward at an angle of 35.1 below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57, how long does it take to move the box 4.20 m, starting...
September 25, 2013 by Anonymous

physics
A softball of mass 0.220 kg that is moving with a speed of 5.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward it is found that the incoming ball has bounced backward with a speed of 3.9 m/s.
January 10, 2010 by Anonymous

Physics
A volleyball player serves the ball horizontally with a speed of 23.8 m/s. How far will it have dropped when it reaches a distance 9.1 m
October 4, 2012 by Lacey

physics
A ball rolls up a ramp and then back down again. The ramp is oriented so that the ball is rolling to the right as it rolls up the ramp. Assume that positive v and a vectors point to the right. Which statement is true about the ball's horizontal acceleration?
January 19, 2012 by Vicki

Physics
A girl kicks her soccer ball with a velocity of 2m/s at an angle of 40 degrees with the horizontal. what is the total time? what is the ranger? and what is the max height of the ball?
December 16, 2009 by Lauren

Physics Honors
A punter in a football game kicks a ball from the goal line at 60 from the horizontal at 25 m/s. How far down field does the ball land?
December 2, 2011 by Jacqueline

physics
A baseball (m = 148 g) approaches a bat horizontally at a speed of 43.8 m/s (98.0 mi/h) and is hit straight back at a speed of 48.4 m/s (108 mi/h). If the ball is in contact with the bat for a time of 1.08 ms, what is the average force exerted on the ball by the bat? Neglect ...
July 25, 2013 by tcc

Calculus
An electric elevator cable with a motor at the top has a multistrand cable weighing 4.5lb/ft. When the car is at the first floor, 180ft of cable are pulled out, and effectively 0ft are out when the car is at the top floor. How much work does the motor do just lifting the cable...
May 2, 2014 by Mason

Algebra 1
I am kinda confused on this can someone help me? As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. The sales representative here tells you they also have two floor plans ...
July 2, 2008 by Anonymous

Physics
A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed. The ball has a mass m = 0.162 kg and moves at v = 4.73 m/s. The circular path has a radius of R = 0.87 m 1)What is the magnitude of the tension in the string when the ball is at...
September 28, 2014 by Jessica

Physics
A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed. The ball has a mass m = 0.162 kg and moves at v = 4.73 m/s. The circular path has a radius of R = 0.87 m 1)What is the magnitude of the tension in the string when the ball is at...
September 28, 2014 by Jessica

physics
A 6.00 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=14.1 N at an angle θ= 19.0 above the horizontal, as shown. What is the speed of the block 3.50 seconds after it starts moving?
December 4, 2010 by jamie

physics
A 6.00 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=14.1 N at an angle θ= 19.0 above the horizontal, as shown. What is the speed of the block 3.50 seconds after it starts moving?
December 4, 2010 by lucy

physics
A 4.5 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=13.50 N at an angle theta=30.0 degrees above the horizontal. What is the speed of the block 5.50 seconds after it starts moving?
February 10, 2011 by jessie

Physics
A bowling ball has a mass of 7 kg and a speed of 1.73 m/s. A baseball has a mass of 0.12 kg and a speed of 25.1 m/s. Which ball has the larger momentum? a. The bowling ball. b. More information needed c. The baseball. d. Both have the same momentum
July 7, 2014 by Anonymous

algebra
2. As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a. The sales representative here tells you they also have two floor plans available, but they only have 38 homes still for ...
March 31, 2010 by Devin

physics
A(n) 0.42 kg softball is pitched at a speed of 12 m/s. The batter hits it back directly at the pitcher at a speed of 27 m/s. The bat acts on the ball for 0.016 s. What is the magnitude of the impulse imparted by the bat to the ball? Answer in units of N s. 011 (part 2 of 2) ...
February 1, 2015 by Kev

physics
Ball 2, with a mass of 30kg, is moving to the left at 10m/s. With what velocity should Ball 1, with a mass of 10kg, move to the right and collide with Ball 2, so that Ball 1 rebounds with a velocity of 30m/s, and Ball 2 with a velocity of 10 m/s, after the collision? Assume ...
February 8, 2012 by Toni

Physics
A 100-n boulder is sitting on a shelf 0.5 meters above the floor. If the boulder is moved vertically to another shelf 3.0 meters above the floor, how much work has been done on the boulder?
October 15, 2008 by Nicole

Physics - Projectile Motion
During baseball practice, you go up into the bleachers to retrieve a ball. You throw the ball back into the playing field at an angle of 42deg above the horizontal, giving it an initial velocity of 15m/s. If the ball is 5.3m above the level of the playing field when you throw ...
August 19, 2010 by Shaila

Dynamics
The rotor is an amusement park ride where a person enters the Rotor when it is stationary and stands against the wall with their back against the wall. The rotor then begins to spin around a vertical axis. After reaching cruising speed, the floor drops away and the patron is ...
September 28, 2012 by Connor

physics
An athlete at the gym holds a 4.33 kg steel ball in his hand. His arm is 68.7 cm long and has a mass of 4.69 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor? I got an answer of 45 N*m (which is ...
October 15, 2008 by Adam

Alg 1 quadratic functions
A baseball player hits a baseball into the outfield. The equation h= -0.005x^2 +x+3 give the path of the ball, where (h) is the height and (x) is the horizontal distance the ball travels. A. What is the equation of the axis of symmetry? It's -100 right? B. What is the Mac ...
October 20, 2011 by Cole

Physics
During baseball practice, you go up into the bleachers to retrieve a ball. You throw the ball back into the playing field at an angle of 42 above the horizontal, giving it an initial velocity of 15 m/s. If the ball is 5.3 m above the level of the playing field when you throw ...
October 5, 2014 by Han

physics
A 1.85 m tall basketball player attempts a goal 9.3 m from a basket (3.05 m high). If he shoots the ball at a 45 angle, at what initial speed must he throw the basketball so that it goes through the hoop without striking the backboard?
March 14, 2013 by John Miller

physics
jane hits a golf ball on a flat fairway. The ball leaves the ground at a 14.5 degree angle and lands 193 meters away. How long was the ball in the air? How fast was the ball moving when it left the ground?
September 25, 2008 by shan

Math( please help)
a ball is kicked in the air from the top of a cliff. the path the ball travels is given by the equation h(t)=-5t^2+17t+22 where h(t) is the height in metres and t is the time in seconds a) what is the maximum height that the ball reaches b)when will the ball hit the ground
October 16, 2011 by Julie

Math( please help)
a ball is kicked in the air from the top of a cliff. the path the ball travels is given by the equation h(t)=-5t^2+17t+22 where h(t) is the height in metres and t is the time in seconds a) what is the maximum height that the ball reaches b)when will the ball hit the ground
October 16, 2011 by Julie

physics help
particle 1 of mass m1 = 0.29 kg slides rightward along an x axis on a frictionless floor with a speed of 1.8 m/s. When it reaches x = 0, it undergoes a one-dimensional elastic collision with stationary particle 2 of mass m2 = 0.40 kg. When particle 2 then reaches a wall at xw...
March 26, 2010 by mike

physics help
particle 1 of mass m1 = 0.29 kg slides rightward along an x axis on a frictionless floor with a speed of 1.8 m/s. When it reaches x = 0, it undergoes a one-dimensional elastic collision with stationary particle 2 of mass m2 = 0.40 kg. When particle 2 then reaches a wall at xw...
March 26, 2010 by beav

physics
particle 1 of mass m1 = 0.29 kg slides rightward along an x axis on a frictionless floor with a speed of 1.8 m/s. When it reaches x = 0, it undergoes a one-dimensional elastic collision with stationary particle 2 of mass m2 = 0.40 kg. When particle 2 then reaches a wall at xw...
March 29, 2010 by mike

physic
A 1.0-kg steel ball and a 2.0-m cord of negligible mass makeup a simple pendulum that can pivot without friction about thepoint O, as in the picture below. This pendulum isreleased from rest in a horizontal position, and when the ball isat its lowest point it strikes a 1.0-kg ...
February 27, 2011 by Anonymous

Physics
A 0.15 kg baseball is pitched with a speed of 35 m/s (77 mph). When the ball hits the catcher's glove, the glove moves back by 2.7 cm (1.08 in.) as it stops the ball. Assuming a constant acceleration of the ball, what was the average force applied by the catcher's glove?
October 22, 2007 by Dante

maath HELPPPP
a ball is thrown into the air at a speed of 96 feet/sec. The equation that expresses the height of the ball as a function of time is: h(t) = -16t2 + 96t + 5 How long does the ball stay in the air after it is thrown? (Round answer to the hundreths of a second)
February 14, 2013 by Erin

physics
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The free-fall acceleration on the moon is 1/6 of its value on earth. Suppose he hit the ball with a speed of 33m/s at an angle 28∘ above the horizontal.
October 5, 2014 by abby

Physics
A warehouse employee used a cable to pull a 125 kg crate across the floor. the angle between the cable and the floor was 25. The magnitude of the pulling force was 185 N. The coefficient of kinetic friction between the crate and the floor was 0.27. A)What was the weight of ...
November 27, 2012 by Kevin

physical science
19. (2 points) Ball 2, with a mass of 30kg, is moving to the left at 10m/s. With what velocity should Ball 1, with a mass of 10kg, move to the right and collide with Ball 2, so that Ball 1 rebounds with a velocity of 30m/s, and Ball 2 with a velocity of 10 m/s, after the ...
February 13, 2014 by anonymous

physics
1. A boy drags a wooden crate with a mass of 20 kg, a distance of 12 m, across a rough level floor at a constant speed of 1.50 m/s by pulling on the rope tied to the crate with a force of 50 N. The rope makes an angle of 25 with the horizontal. a.What is the magnitude of ...
October 24, 2011 by annie

math
You can find the distance d an object falls in feet for time t in seconds using the formula d= 16t^2. Suppose a ball is dropped out of a window of a tall building. How far will the ball in 3 seconds? a 144 ft b 96 ft c 48 ft d 16 ft plz explain how to do this? thanks !!!
March 20, 2009 by Anonymous

PHYSICS
A 7 kilogram bowling ball is dropped from a fourth story window. If each story is 3 meters high, use energy conservation (not the equations of motion) to find the ball's velocity when it strikes the ground. Ignore air resistance. Thank you
February 23, 2012 by GRISSELL

PHYSICS
A 7 kilogram bowling ball is dropped from a fourth story window. If each story is 3 meters high, use energy conservation (not the equations of motion) to find the ball's velocity when it strikes the ground. Ignore air resistance.
February 26, 2012 by TRACY

Physics
An old building is being demolished by swinging a heavy metal ball from a crane. Suppose that such a 85kg ball swings from a 20-m-long wire at speed 10m/s as the wire passes the vertical orientation. What tension force must the wire be able to withstand in order not to break? ...
February 12, 2015 by Anonymous

Physics
please can u check my answer Here are the questions: 1. A 0.45 kg book is resting on a dessktop 0.64 m high. Calculate the book's potential energy relative to a)the desktop? b)the floor. 2. A 0.636 kg basketball has a potential energy of 19J at teh basket. How high is teh ball...
April 9, 2011 by Anonymous

Physics
I just want to be sure if my answers make any sense! A kid throws a ball in the air and catches it 5 seconds later a) What is the initial velocity of the ball? No air friction. b) What is the maximum height which the ball has reached above its departure point? c) If this kid ...
November 18, 2011 by Tommy

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