# Hello everyone I know that when a force is applied it has to exert a force opossite But this really is not in my head can someone please give me an evidence or even a diagram showing how can we

22,570 questions
1. ## physics

a 50 kg crate is at rest on a level surface the coefficients of friction are 0.3 and 0.4,what is the normal force acting on the crate, a man begins pushing horizontally on the crate how much force must the man exert to start the crate moving, how much

asked by bryan on August 27, 2016
2. ## Physics

A force is applied to a door at an angle of 56.8° and 0.34 m from the hinge. a) What force produces a torque with a magnitude of 2.18 N·m? b) How large is the maximum torque this force can exert?

asked by Mike on March 12, 2013
3. ## Physics

A 15 N wooden block is dragged for 15 meters across a wooden floor in 15 seconds... I'm given that the mew (the greek leter uk) or however u say it is .2 I have to make a free body diagram I sloved and got Fn = 15 N mg = -15 N Ff = -3 N How do I solve for

asked by Physics on March 18, 2009
4. ## Physics

Hello everyone I know that when a force is applied it has to exert a force opossite But this really is not in my head can someone please give me an evidence or even a diagram showing how can we exert an opposite force if we are walking forwards Thanks alot

asked by Jimmy on June 7, 2007
5. ## physics

Blocks with masses of 1kg , 4kg , and 6kg are lined up in a row on a frictionless table. All three are pushed forward by a 50N force applied to the 1kg block. How much force does the 4kg block exert on the 6kg block? How much force does the 4kg block exert

asked by Kalen on October 7, 2009
6. ## Physics

A grocery cart with a mass of 18 kg is pushed at constant speed along an aisle by a force F = 12 N. The applied force acts at a 20° angle to the horizontal. Find the work done by each of the forces on the cart if the aisle is 14 m long. work done by the

asked by Anonymous on November 18, 2009
7. ## physics

If you exert a force of 60 N on a car, it moves at a constant velocity. (i.e there is a frictional force of 60 N) What is its mass when you exert 80 N on it, it accelerates from rest to 2.0 m/s in 100 seconds?

asked by jasmin on June 10, 2012
8. ## 11th garde physics

A grocery cart with a mass of 18 kg is pushed at constant speed along an aisle by a force F = 12 N. The applied force acts at a 20° angle to the horizontal. Find the work done by each of the forces on the cart if the aisle is 17 m long. a)work done by the

asked by Luricela on February 13, 2010
9. ## Physics

In the nail puller shown in the figure below you exert a force 49.6 cm from the pivot and the nail is 1.90 cm on the other side. What minimum force must you exert to apply a force of 1460 N to the nail to pull the nail up?

asked by Emily on February 26, 2016
10. ## physics

In the nail puller shown in the figure below you exert a force 53.2 cm from the pivot and the nail is 1.50 cm on the other side. What minimum force must you exert to apply a force of 1380 N to the nail to pull the nail up?

asked by stephanie on November 14, 2017
11. ## Physics

Three blocks on a frictionless horizontal surface are in contact with each other A force F is applied to block 1 (m1) Draw a free body diagram for each block ok for the diagram is the force F applied horizontal to mass one does this force act on m2 all the

asked by Physics on July 11, 2009
12. ## physics

two charged bodies exert a force of 86N on each other. If they are moved so that they are 6 times farther apart, what is the new force that they will exert on each other?

asked by Anonymous on February 24, 2012
13. ## physics

the small piston of a hydraulic press has an area of 7.0 cm squared. if the applied force is 30.0 N, find the area of the large piston to exert a pressing force of 4000 N

asked by maria on October 23, 2011
14. ## Phys

Three blocks on a frictionless horizontal surface are in contact with each other. A force F is applied to block A (mass mA). (a) Draw a free body diagram for each block. I've drawn it and it looks like this, but I'm not sure if I'm including everything.

asked by anonymous on February 7, 2013
15. ## physics

because of friction, a constant force of 20 N is needed to slide a box across a room to the right at a constant speed, and box is moved 3 m. What is the friction force and how much work is done by friction force?? How much work is done by gravity? How much

asked by mitch on October 1, 2006
16. ## physics

A 30 kg sled is pulled at constant speed with a horizontal rope for a distance of 450 m. The coefficient of friction is 0.15. Find the work done by the applied force on the rope. it looks like this means we have to find the applied force in newtons before

asked by zuqndorpchfj on June 26, 2015
17. ## Physics 11

A girl pushes her little brother on his sled w/ a force of 35N for 840s. How much work does she do if the force of friction I'd 27N? I subtracted the force of friction from the applied force to get my net force of 8N but I don't know where to go from

asked by Kayla on May 23, 2017
18. ## Physics

The combination of an applied force and a frictional force produces a constant total torque of 38.1 Nm on a wheel rotating about a fixed axis. The applied force acts for 7.00 s, during which time, the angular speed of the wheel increases from 2.40 rad/s to

asked by Tessa on April 26, 2010
19. ## Physics (Tension and Springs)

An archer must exert a force of 375 newtons on the bowstring so that the string makes a 35 degree angle with the vertical. a)find the tension in the bowstring b)if the applied force is replaced by a stretched spring, and the spring is stretched 30 cm from

asked by Emily on March 16, 2015
20. ## phYsics

Consider three charged particles placed along the x-axis. The particle with q1 = 9.27 nC is at x = 7.66 m and q2 = 4.82 nC is at x = 2.64 m. Where must a positive charge, q3, be placed such that the resultant force on it is zero? I know F3= F13+ F23 (net

asked by echem on April 7, 2010
21. ## laws of motion

a force is applied to a body of mass 0.9 kgs that is at rest the force is applied for a duration of 5 sec and as a result the body covers a distance of 250 m find the magnitude of force

asked by ruthwik on August 23, 2016
22. ## physics

A row of blocks are lined up with masses of 1.10 kg, 2.72 kg and 4.05 kg. The masses are then pushed forward by a 14.3 N force applied to the 1.10 kg block. If the table is frictionless, how much force does the 2.72 kg block exert on the 4.05 kg block?

asked by Marina on October 19, 2016
23. ## physics

What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

asked by Tom on October 30, 2012
24. ## physics

What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

asked by Tom on October 29, 2012
25. ## physics

What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

asked by Tom on October 29, 2012
26. ## physics

What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

asked by Tom on October 29, 2012
27. ## Physics

A 77 kg sprinter is running the 100 m dash. At one instant, early in the race, his acceleration is 4.7 m/s^2. a) What total force does the track surface exert on the sprinter? Assume his acceleration is parallel to the ground. Give your answer as a

asked by Anonymous on July 27, 2013
28. ## Physics

A 75.0-kg cross-country skier is climbing a 3.0o slope at a constant speed of 2.00 m/s and encounters air resistance of 25.0 N. Find his power output for work done against the gravitational force and air resistance. (b) What average force does he exert

asked by Anonymous on June 10, 2014
29. ## Physics

A 75.0-kg cross-country skier is climbing a 3.0o slope at a constant speed of 2.00 m/s and encounters air resistance of 25.0 N. Find his power output for work done against the gravitational force and air resistance. (b) What average force does he exert

asked by Anonymous on June 10, 2014
30. ## Physics

What force would you have to exert on a 326-N trunk up a 19.0° inclined plane so that it would slide down the plane with a constant velocity? What would be the direction of the force? (The coefficient of friction between the plane and the trunk is 0.328.)

asked by Jane on December 16, 2007
31. ## Physics

A solid cylinder is pivoted at its center about a frictionless axle. A force is applied to the outer radius of 1.27 m at an angle of 30 ◦ above the tangential and exerts a force of 5 N. A second force is applied by wrapping rope around the inner radius

asked by Caleb on February 26, 2015
32. ## Physics

A solid cylinder is pivoted at its center about a frictionless axle. A force is applied to the outer radius of 1.27 m at an angle of 30 ◦ above the tangential and exerts a force of 5 N. A second force is applied by wrapping rope around the inner radius

asked by Caleb on February 28, 2015
33. ## physics

The small piston has a diameter of 2cm and the large piston has a diameter of 6cm. How much more force can the larger piston exert compared with the force applied to the smaller piston?

asked by Anonymous on January 28, 2011
34. ## Physics

Is the maximum torque that a given force can exert on an object occurs when the force is applied to the axis of rotation. I think it is true because torque is always specific when it comes to the axis of rotation. Am I correct?

asked by David on December 16, 2011
35. ## Physics

Blocks with masses of 1 kilogram, kilogram, and 3 kilogram are lined up in a row on a frictionless table. All three are pushed forward by a 12 Newton Force applied to the 1 kilogram block. Draw a free body diagram of all 3 blocks. How much force does the 2

asked by Anonymous on November 9, 2016
36. ## physics

the nail puller shown in the figure below you exert a force 53.2 cm from the pivot and the nail is 1.50 cm on the other side. What minimum force must you exert to apply a force of 1380 N to the nail to pull the nail up? 38.9 N is correct What is the

asked by stephanie on December 6, 2017
37. ## physics -jumper

The feet of a standing person of mass m exert a force equal to mg on the floor, and the floor exerts an equal and opposite force upwards on the feet, which we call the normal force. During the extension phase of a vertical jump, the feet exert a force on

asked by lau on June 4, 2010
38. ## Physics

A horse is harnessed to a sled having a mass of 231 kg, including supplies. The horse must exert a force exceeding 1250 N at an angle of 36.3° (above the horizontal) in order to get the sled moving. Treat the sled as a point particle. HINT - Use the

asked by Doug on October 2, 2018
39. ## Physics

A 54 kg box is being pushed a distance of 7.0 m across the floor by a force P whose magnitude is 153 N. The force P is parallel to the displacement of the box. The coefficient of kinetic friction is 0.25. Determine the work done on the box by each of the

asked by Brandon on October 13, 2008
40. ## Statics

85 lb force is applied to the 200lb crate, which is stationary before the force is applied. Determine the force exerted by the horizontal surface on the crate

asked by Tasha on April 11, 2013
41. ## Physics

Two blocks (M1 = 2.57 kg and M2 = 6.71 kg) are in contact on a frictionless, horizontal tabletop. An external force, $\vec{F}$, is applied to block 1, and the two blocks are moving with a constant acceleration of 2.59 m/s2. What is the contact force

asked by Lyra on September 22, 2013
42. ## math

During a football game, two players try to tackle another play. One player applies a force of 50.0 N to the east. A second player applies a force of 120.0 N to the north. What is the total applied force? (Since force is a vector, you must give both the

asked by jeff on September 5, 2010
43. ## Physics

Two 2.160 kg crystal balls are 0.870 m apart in the vertical direction. Calculate the magnitude of the gravitational force they exert on a 8.80 g marble located 0.260 m horizontally out from the center of a line that intersects the centers of the balls.

asked by Lindsay on December 17, 2007
44. ## physics

A 300 kg boulder is dragged 8 m across level ground with a chain that makes an angle of 37° with the horizontal. If the applied force on the chain is 800 N and there is a coefficient of friction of 0.20, find (a) the work done by the applied force, (b)

asked by zuqndorpchfj on June 26, 2015
45. ## physics

In a hydraulic piston, the small piston has a diameter of 2cm and the large piston has a diameter of 6m. How much more force can the larger piston exert compared with the force applied to the smaller piston?

asked by nick on August 6, 2012
46. ## Physics

The pistons of a hydraulic press have radii of 2.00cm and 12.00cm, respectively. A) What force must be applied to the smaller piston to exert a force of 5250N on the larger piston? B) What is the pressure in (N/cm2) on each piston? C) What is the

asked by Joe on November 16, 2014
47. ## physics

A 57.0 kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 23.0 m. (a) What is the centripetal acceleration of the child? (b) What force (magnitude and direction) does the seat exert on the child at the lowest

asked by Sarah on June 19, 2011
48. ## Physics/Math

A 2.8 kg body is at rest on a frictionless horizontal air track when a horizontal force F acting in the positive direction of an x axis along the track is applied to the body. The force F is applied to the body at t = 0, and the graph records the position

asked by Technoboi11 on March 5, 2007
49. ## physics

a strong magnet attracts a paper clip to itself with a certain force. Does the paper clip exert a force on the strong magnet? If so, why not? If so, does it exert as much force on the magnet as the magnet exerts on it? Newtons Third Law: Forces are always

asked by michael on October 28, 2006
50. ## Science

Which three forces are applied on winds in the upper atmosphere? 1. Gravity 2. Pressure gradient force 3. Coriolis force 4. Centripetal force 5. Frictional force Pressure gradient force, Coriolis force, and Centripetal force. Is this correct?

asked by ! on October 9, 2018
51. ## plz help me

1)When a 10-kg crate is pushed across a frictionless horizontal floor with a force of 14 N, directed 25° below the horizontal, the magnitude of the normal force of the floor on the crate is (g = 10 m/s2): 2)A constant force of 2.8 N is exerted for 9.0 s

asked by Reem on April 8, 2015
52. ## Physics

A ball acquires a horizontal speed of 12m/sec when a force is applied for a distance of .50m. If the ball has a mass of 1.0kg what is the force applied? ANSWER: 144N....I'm not sure what formulas I'd apply. It takes a force of 109N to life a stone straight

53. ## Physics

A constant net force of 406 N, up, is applied to a stone that weights 33 N. The upward force is applied through a distance of 2.4 m, and the stone is then released. To what height, from the point of release, will the stone rise? Net force = ma W = mg PE =

asked by Jared on December 16, 2007
54. ## Physics

A woman holds a 1.90-m-long uniform 5.0-kg pole as shown in (Figure 1) ( its horizontal). A. Determine the force she must exert on the pole at A. Express your answer to two significant figures and include the appropriate units. Enter positive value if the

asked by Natalie on December 11, 2015
55. ## physics

the sensor in the torso of a crash-test dummy records the magnitude and direction of the net force acting on the dummy. if the dummy is thrown forward with a force of 130.0 N while simultaneously being hit from side with a force of 4500.0 N, what force

asked by i love polka on November 4, 2008
56. ## science

a small weather rocket weighs 20.5 N. The rocket is carried up into the air by a balloon. The rocket is released from the balloon and fired. What is the acceleration of the rocket if an upward force of 25 N is applied? Net force = force up - force down.

asked by leafprincess on December 30, 2006
57. ## Physics

When certain a force is applied to a 2kg standard mass, its acceleration is 5m/s^2.When the same force is applied to another object its aceleration is 2m/s^2. The mas of the objects is:

asked by Britni on May 3, 2011
58. ## physics

The 850 kg piano is being pushed across the floor with an applied force of 283 N [forward] and a force of friction of 271 N [backwards]. If the normal force balances the force of gravity, draw a free body diagram for the piano.

asked by iyzi on October 13, 2013
59. ## college

how would you go about doing this type of problem thank you You are trying to raise a bicycle wheel of mass x and radius r up over a curb of height h . To do this, you apply a horizontal force . 1. What is the least magnitude of the force that will succeed

asked by amy on May 18, 2009
60. ## Physics

Two charged smoke particles exert a force of 4.2x10^-2 N on each other. What will be the force if they are moved so they are only one eighth as far apart? F= 4.2x10^-2 N K= 8.99x10^9 e= 1.6x10^-19 Do I solve for r even though they're asking me to find the

asked by Ali on May 14, 2010
61. ## physics

A 34.2 -kg block rests on the oor. (a) What force (N) does the oor exert on the block? (b) If a rope is tied to the block and run vertically over a pulley, and the other end is attached to a free-hanging 5.6 kg weight, what force (N) does the oor now exert

asked by waqas on August 6, 2011
62. ## Physics

A 4.0 kg block is stacked on top of a 12.0 kg block, whcih is accelerating along a horizontal table at a = 5.2 s^-2 m. Let Mu k = Mu s = Mu. (a) What mininum coefficent of friction Mu between the two blocks will prevent the 4.0 kg block from sliding off?

asked by QUESTION on August 20, 2009
63. ## Physics

A car is driven at a constant speed of 21 m/s (76km/h) down a road. The car's engine delivers 52 kW of power. Calculate the average force of friction that is resisting the motion of the car. My thinking: Convert 52 kW to 5200 W. Force of friction = force

asked by Einstein on November 14, 2007
64. ## physics- multiple choice

1. Two forces are applied to a box on a frictionless surface. One force is 40 N [S]. The second force is 70 N [N30ºW]. What is the overall net force? a) 40.6 N [S59.5ºE] b) 110 N c) 40.6 N [N59.5ºW] d) 40.6 N [S30.5ºW] 2. When drawing free body

asked by Jessie on December 12, 2013
65. ## physics

15)If a horizontal force applied on a resting object is greater than the force of friction, the object will. accelerate in the direction of the applied force 16)You are pushing a 55N lawnmower across the yard. Its handle makes a 55 degree angle with the

asked by Jon on March 31, 2008
66. ## physics

You exert a force of a known magnitude F on a grocery cart of total mass m. The force you exert on the cart points at an angle θ below the horizontal. If the cart starts at rest, determine an expression for the speed of the cart after it travels a

asked by Anonymous on October 15, 2014
67. ## AP Physics 1

You exert a force of a known magnitude F on a grocery cart of total mass m. The force you exert on the cart points at an angle θ below the horizontal. If the cart starts at rest, determine an expression for the speed of the cart after it travels a

asked by Max Pat on September 29, 2016
68. ## Physics

Two blocks are in contact on a horizontal, frictionless table. Block 1 has a mass of 4.39 kg and block 2 has a mass of 2.59 kg. A horizontal force of magnitude 8.25 N is applied to the one of the blocks. Find the magnitude of the force between the blocks

asked by Angela R on July 2, 2015
69. ## physics

1. A 100N block lies on a frictional surface. A force of 50N was applied horizontally where the block had moved 5 m from the positive direction. Find the work done by the applied force and the work done by the weight of the block. 2. Using Example 1, if

asked by ree on October 16, 2014
70. ## Physics

A force of 32 N is applied at the end of a wrench handle that is 27 cm long. The force is applied in a direction perpendicular to the handle as in the diagram. (a) What is the torque applied to the nut by the wrench? (b) What would the torque be if the

asked by Anonymous on July 7, 2014
71. ## Physics

Hooke's law states that the distance, d, a string is stretched varies directly with the force, F, applied to the spring. If a force of 12 pounds stretches a spring 3 inches, how far will the spring stretch when a force of 30 pounds is applied?

asked by Rizza Mae on November 9, 2016
72. ## physics

Two charges, qA and qB, are separated by a distance, d, and exert a force, F, on each other. Analyze Coulomb's law and answer the following questions. What new force will exist if d is cut in half? What new force will exist if qA is tripled and d is

asked by Mara on January 27, 2009
73. ## physics

An object that deforms when a force is applied to it and returns to its original form when the force is no longer applied is said to be

asked by Maria Gonzales on December 12, 2013
74. ## physics

How mush force must be exerted at an angle of 45 to top of a table to push along a weight when the frictional resistance to be overcome is a force of 2kg. Force is given in kg so i understand like this: N=kg.m/s^2 so the force in N is such when applied to

asked by jzee11 on July 5, 2015
75. ## Physics

A bicycle wheel has a diameter of 47.6 cm and a mass of 0.809 kg. The bicycle is placed on a stationary stand on rollers and a resistive force of 60.1 N is applied to the rim of the tire. Assume all the mass of the wheel is concentrated on the outside

asked by Youthers on January 27, 2015
76. ## Physics

Two blocks ( m1 = 6.8kg, m2 = 5.2kg) are in contact with each other while sitting on a friction less surface. M2 is not resting on the frictionless surface, rather to the side of m1. The coefficient of static friction between the blocks is 0.60, and the

asked by David on April 25, 2019
77. ## physics

A 40 N force is applied to pull the desk horizontally to the right. What is the magnitude (the net force or the total force) acting on the deak ?

asked by maria on December 1, 2011
78. ## physics

. Two people pull on a stubborn mule, as seen from a helicopter in Figure 2.1. Find (a) the single force that is equivalent to the two forces shown, and (b) the force that a third person would have to exert on the mule to make the net force equal to zero.

asked by Anonymous on September 4, 2011
79. ## Physics

Help a constant force equal to (5i+2j)N moves a particle through a displacement S=(2i+3j). Calculate the workdone by the force. At what angle to the horizontal was the force applied?

asked by Fiyin on October 12, 2012
80. ## physics

A 33 N force acting at 90° and a 44 N force at 60° are applied concurrently at a point P. What is the magnitude and direction of the resultant force?

asked by nic on November 18, 2010
81. ## Dynamics of rigid bodies

A 20 kg body moving at 30m/s is to be stopped by a constant retarding force of 100N. What is the impulse due to the force? How long must the force be applied?

asked by Vincy on June 5, 2017
82. ## Physics

Calculate the work done by the applied force accelerating a 2 kg object at 3 m/s/s over 4 m if there is a 2.5 frictional force of resistance. I calculated using F=ma=6N; then net force = 6N-2.5N=3.5 N so W=fd=14J. Did I do this correctly? Thanks

asked by KC on April 6, 2009
83. ## physics

Score: 0 / 1 Tries left: 10 Question 5 A large crate has a mass of 214 kg. A horizontal force of positive 214 N is applied to it, causing it to accelerate at 0.130 m/s2 horizontally. What is the force of friction opposing the motion of the crate? Use the

asked by tori on November 15, 2017
84. ## physics

1. A piece of rectangular block weighing 5 kg is pressed on a vertical wall by a horizontal force applied to the block. If the coefficient of friction between the block and the wall is 2.0, what force is necessary to keep the block in place? 2. If the

asked by ruby on March 20, 2013
85. ## Physics

You pushed a 1 kg box on floor where= 0.3. If the force you applied was 5 N, will the box move? m = 1kg u= 0.3 Fapp= 5 N Ff= (0.3)(1) (9.81) Ff = 2.943 N So therefore the box would move because the frictional force is less than the applied force. Did I

asked by Lena on April 16, 2009
86. ## Physics

A woman holds a 1.9 m long uniform 5.5 kg pole as shown in the figure . her hands are 30 cm apart. Determine the magnitudes of the forces she must exert with each hand. To what position should she move her left hand so that neither hand has to exert a

asked by Nicole on November 7, 2010
87. ## physics

A woman holds a 1.9 m long uniform 5.5 kg pole as shown in the figure . her hands are 30 cm apart. Determine the magnitudes of the forces she must exert with each hand. To what position should she move her left hand so that neither hand has to exert a

asked by Nicole on November 7, 2010
88. ## physics

a 65kg person dives into the water from the 10m platform. she comes to a stop 2m below the surface of the water. what net force did the water exert on the swimmer? so for the net force i got -2548N i know: vf^2=vi^2 + 2ad vf^2 = 0 + 2(9.8)(10) vf^2 = 196

asked by eric on February 6, 2014
89. ## Physics

A stack of books rests on a level perfectly smooth surface. A force F acts on the stack and it acclerated at 3m/s^2. A 1kg book is added to the stack. The same force is applied and now the stack accelerates at 2m/s^2. What was the mass of the original

asked by Tammy on October 3, 2007
90. ## physics

Would someone check my thinking please. A solid sphere (mass, r, and moment of inertia given) is rotating at a given angular speed. Friction is constantly applied at the 'equator' of the sphere, and brings it to rest in 3s. Find the force. I worked out the

asked by charlie on June 15, 2009
91. ## Physics

A 10-kg wooden box rests on a ramp that is lying flat. The coefficient of static friction is 0.50, and the coefficient of kinetic friction is 0.30. What is the friction force between the box and ramp if no force horizontal force is applied to the box? a 20

asked by Anonymous on October 5, 2010
92. ## Physics

A bicycle wheel has a diameter of 47.6 cm and a mass of 0.809 kg. The bicycle is placed on a stationary stand on rollers and a resistive force of 60.1 N is applied to the rim of the tire. Assume all the mass of the wheel is concentrated on the outside

asked by Youthers on January 27, 2015
93. ## Physics

A 2.0kg object is moving at 3 m/s. A 4-N force is applied in the direction of motion and then removed after the object has traveled an additional 5m. The work done by this force is. Would the answer be simply: W=F*d= (4* 5m)= 20N and you only take the

asked by Nancy on November 4, 2006
94. ## Physics

How much force does an 88 kg astronaut exert on his chair while sitting at rest on the launch pad? Answer: 860N Now the question: How much force does the astronaut exert on his chair while accelerating straight up at 14 m/s^2? What do you do first, how do

asked by falcon306 on July 17, 2011
95. ## physics

Two charges, qA and qB, are separated by a distance, d, and exert a force, F, on each other. Analyze Coulomb's law and answer the following questions. (a) What new force will exist if qA is doubled? (b) What new force will exist if qA and qB are cut in

asked by Billy on March 20, 2013
96. ## physic

a force of 3.5 N is applied to a spring which obeys Hooke's law and produces and extension of 0.07m. calculate the spring constant what is the size of the force that will produce and extension of 4.0 cm caluclate the unstretched length of the spring if its

asked by ablin on May 18, 2010
97. ## physics

1) Two boxes are placed are placed side by side on a frictionless surface so that they touch each other. Box A has a mass of 4 kg. Box B has a mass of 12 kg. A constant force of 24 N is applied to box A. What force does box A exert on box B?

asked by pat on November 10, 2009
98. ## Physics

A weight lifter returned from the grocery store and unpacked his purchases, fitting everything into the refrigerator door. If the dimensions of the door are 2 meters * 0.57 meters, and he applies a force of 77 N at an angle of 120 degrees with respect to

asked by Christinia on March 29, 2007
99. ## Physics

A 1,100 kg car is traveling at 15 m/s when the brakes are suddenly applied. How far a distance will it travel if the brakes can exert a force of 6,000 N?

asked by Naren on November 28, 2017
100. ## Physics/Math

A cold package of hot dogs slides rightward across a frictionless floor through a distance d = 20.5 cm while three forces are applied to it. Two of the forces are horizontal and have the magnitudes F1 = 5.00 N and F2 = 1.00 N; the third force is angled

asked by Technoboi11 on March 1, 2007