When a body is in equilibrium. ( choose one) 1. must have zero momentum 2. no forces can be acting on it 3. may be accelerating uniformly 4. vector sum of forces acting on it must be zero

Q: 5. An old rope can now only safely suspend 120 kg. When the rope is tied to a beam, it hangs down…

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Q: 41. Predict/Calculate As part of a physics experiment, you stand on a bathroom scale in an elevator.…

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Q: An arrow with a mass of 250 g has a speed of 27 m/s before it passes through a 1.5 cm piece of…

A: MA = Mass = 250 g = 0.250 Kg , Vi = Velocity = 27 m/s T = d = thickness = 1.5 cm = 0.015 m Vf =…

Q: 1.Two ice skaters stand at rest in the center of an ice rink. When they push off against one another…

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Q: 2. Can an inanimate object (such as a table) exert a force? Can the magnitude of the force exerted…

A: Inanimate objects like tables, cars, mobile, etc, can also exert force. All these objects have a…

Q: 5. While a particle is moving with constant velocity it is acted on by 2 forces. One of the forces…

A: Given data: The first force is F1=-2i+6j Since the particle is moving with constant velocity, the…

Q: A block is pushed across a horizontal surface by the force shown in the image. If the coefficient of…

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Q: A tennis ball, 0.314 kg, is accelerated at a rate of 164 m/s² when hit by a professional tennis…

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Q: 3) To hit a home run in baseball, the batter needs to hit the ball to give it a speed of at least 75…

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Q: Starting from rest, a 2-kg body acquires a speed of 8 m/s in 2 seconds. The net force acting on the…

A: The expression for the acceleration is given by, a=v-ut Use the given values, a=8 m/s-02 s=4 m/s2

Q: 14. Cars that are moving along horizontal roads are going to be stopped by plowing into identical…

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Q: A block of mass m is dropped from the fourth floor of an office building and subsequently hits the…

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Q: 4.) How long (T in seconds) does a force of F=200N need to be applied to a mass of M=10kg, to…

A: Given: The mass of the object is 10 kg. The applied force is 200 N. The initial velocity is 0 m/s.…

Q: 1) 12N 26 N 60 N 7 kg 40 kg 300N Net Force = Net Force = 180 N 3) 4) 40 kg 70 N 20 N Net Force = Net…

A: 1) Net Force = 26 N - 12 N = 14 N 2) Net Force = 300 N + 60 N = 360 N 3) Net Force = 180 N + 20 N =…

Q: how much force do the expanding gases in a gun barrel exert on a 6.0g bullet as it accelerates from…

A: The objective of the question is to calculate the force exerted by the expanding gases in a gun…

Q: 9. Am - 500 kg sack of coal falls vertically onto a M = 2000 kg railroad flatcar which was initially…

A: Given Sack mass msack           = 500 kg Railroad car mass mcar = 2000 kg Initial velocity vi…

Q: A pile driver weighing 200 pounds strikes the top of the pile after being fallen from a height of 20…

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Q: An arrow, starting form rest, leaves the bow with a speed of 25.0 m/s. If the average force exerted…

A: The given data are: u=25 m/sF'=2F Here, u is the speed in the first case, F' is the average force in…

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: