A projectile fired into frictionless space will need how much force to keep it going? Select one: a.zero. b.the same force with which it was fired. c.twice the force of the firing. d.half the force with which it was fired.

Q: 2. A 10-lb rock and a 1-lb rock are dropped simultaneously from the same height. (a) Some say that…

A: Write the given values of this problem. M=10 lbm=1 lb

Q: An applied force of 89.4N is used to accelerate an object across a frictional surface. The object…

A: Given data:  Applied force (F) = 89.4 N Weight of the object (W) = 61.2 N Frictional force (f) =…

Q: A person is trying to lift a box off the floor. The box has a mass of 55kg and the person can lift…

A:

Q: A force F applied to an object of mass m, produces an acceleration of 4.00 m/s2. The same force…

A:

Q: A .22 rifle bullet, traveling at 350 m/s, strikes a large tree, which penetrates to a depth of 0.130…

A: Given: The initial speed of the bullet is 350 m/s. The mass of the bullet is 1.8 g. The stopping…

Q: Q27. How much force is required to change the velocity of a body of mass 1 kg moving from 20 m/s to…

A:

Q: A person in a kayak starts paddling, and it accelerates from 0 to 0.703 m/s in a distance of 0.307…

A:

Q: The human head can be considered as a3.3-kg cranium protecting a 1.5-kg brain, with a small amount…

A: Given: Weight of the human head = 3.3 Kg Weight of the brain = 1.5 Kg Force applied = 2800 N

Q: In earlier days, horses pulled barges down canals in the manner . Suppose the horse pulls on the…

A: Given information: Here, F force with which the horse pulls the barge, θ is the angle at which the…

Q: A force acts on a 2-kg mass and gives it an acceleration of 3 m/s2. What acceleration is produced by…

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Q: 42.0 kg mass is moving with velocity +68.0 m/s when it experiences an acceleration of -7.00 m/s².…

A:

Q: The nucleus of Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously…

A: Given: The separation between two alpha particle is 3.16x10-15 m. The mass of the alpha particle is…

Q: A 100 kg go-kart travels at a velocity 2 m/s and then quickly stops in 8 seconds to avoid an…

A: Here, a=∆v∆t=0m/s-2m/s8s=-0.25m/s2

Q: A 2 000-kg car is slowed down uniformly from 20.0 m/s to 5.00 m/s in 4.00 s. (a) What average force…

A: The mass of a car is, m=2000 kg The initial velocity of a car is, u=20 m/s The final velocity of a…

Q: The instruments attached to a weather balloon have a mass of 4.1 kg. The balloon is released and…

A:

Q: 6. A 60 kg astronaut, floating freely in space, pushes forward with a force of 30 N on a freely…

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Q: An astronaut weighing 193 lbs on Earth is on a mission to the Moon and Mars. (a) What would he weigh…

A: Given  Weight on earth W=193lbs=193×4.45=858.507 N

Q: lowing best describes Newton's first law? a. A relationship between an applied force, the mass, and…

A: Given:-  Which of the following best describes Newton's first law? Find:- correct option  a) A…

Q: An applied force of 111 N is used to accelerate an object across a frictional surface. The object…

A:

Q: What force is required to slow a 1250-kg car traveling 115 km/h to 30.0 km/h within 3.50 s? (a) How…

A: Given data The mass of the car is: m = 1250 kg The initial speed of the car is: u = 115 km/h =…

Q: 2) The ground reaction force acting on Carter during his long jump is 4,500N acting forward and…

A:

Q: A boat moves through the water with two forces acting on it. One is 2000 N forward push by the water…

A: Formula of acceleration of boat is as follows: a=Fnetm…

Q: A person in a kayak starts paddling, and it accelerates from 0 to 0.703 m/s in a distance of 0.307…

A: Given data:  Initial velocity (v0) = 0 m/s Final velocity (v) = 0.703 m/s Displacement (Δx) = 0.307…

Q: 100. mmh The speed of a bobsled is increasing because it has an accel- eration of 2.4 m/s². At a…

A: Let F denote the force by which the bobsled propels, a denote the acceleration, f denote the…

Q: An apple of mass 0.1 kg falls from a tree to the ground 2.0m below. a) How long does it take the…

A: Given: The mass of an apple is m = 0.1 kg. Height of an apple is h = 2.0 m.

Q: A lunar lander in powered descent at 100 m above the surface of the moon slows down from a velocity…

A: Given data The initial velocity of the lunar lander is: u = 20 m/s The final velocity of the lunar…

Q: Keith Lee, who is billed at 154 kg, ejects Adam Cole, billed at 95 kg, from frame. Assuming Cole…

A: Given data The mass of Keith lee is given as mk = 154 kg. The mass of adam cole is given as ma = 95…

Q: 2. A person of mass 60 kg is able to exert a constant 1200 N of force downward when executing a jump…

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Q: A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a…

A:

Q: A net force is applied in the positive directions to an object moving in one dimension. The graph of…

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Q: A 1370 kg jeep traveling at 19 m/s can be stopped in 24.0 s by gently applying the brakes. a) What…

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Q: 25. A spaceship is initially moving in outer space turns off its engine such that the spaceship does…

A: A spaceship is initially moving in outer space turn off its engine such that thespace ship does not…

Q: An applied force of 89.4 N is used to accelerate an object across a frictional surface. The object…

A: applied force of Fapp = 89.4 N weight of object, W= mg=61.2 N and encounters a frictional force of…

Q: A 1100-kg car pulls a boat on a trailer. (Enter the magnitudes.) (a) What total force resists the…

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Q: 6. Scientists are experimenting with a kind of gun that may eventually be used to fire payloads…

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Q: a,c,d i dont get. for a), the second picture is the diagram

A:

Q: a vehicle accelerated from rest. The net force from the engine is 15000N. a) what is its…

A:

Q: sprinter with a mass of 80 kg accelerates uniformly from 0 m/s to 9 m/s in 3s. a- what is the…

A: Given Mass m = 80 kg Initial velocity u = 0 m/s Final velocity v = 9 m/s Time t = 3 s

Q: A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a…

A: Given, Force, F= 800 N, Mass of losing player, Ml=90 kg, acceleration, al=-1.20 m/s, and mass of…

Q: The nucleus of Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously…

A: Given, The nucleus of 8Be which consist of 4 protons and 4 neutrons, Two alpha particle are…

Q: The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously…

A:

Q: A boat moves through the water with two forces acting on it. One is a 1,650-N forward push by the…

A:

Q: A box of mass 10 kg is pulled by a force of 50 N. The frictional force between the box and the…

A: Force F= 50 N Friction force f= 20N Mass m= 10 kg Intial velocity u= 4m/s

Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: