A ball of 23 g hangs from the roof of a freight car by a string. When the freight car begins to move, the string makes an angle of 35 degrees with the vertical (see figure). If the force of weight due to gravity points down the page and if we use 9.80 m/s2 for the local acceleration due to gravity. (a) What is the acceleration of the freight car (in m/s2). What is the tension in the string (in N)?

Q: An 80 kg person is standing on a scale in an elevator. Find the weight that the scale reads when the…

A: The answers are below

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Q: The upward normal force exerted by the floor is 620 N on an elevator passenger who weighs 650 N.…

A: Given data The upward normal force is N1=620 N  The weight of the passenger is W1=650 N Let the…

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Q: A 0.3 kg coffee cup is sitting on a desk. If the acceleration due to gravity is 9.8 m/s what is the…

A: Given  Mass of coffee cup is m= 0.3 kg Acceleration due to gravity is g= 9.80 m/s2

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Q: Two dogs play tug-of-war with a rope toy that has a mass of 0.50 kg. If one dog pulls on the toy…

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Q: Two people are pushing horizontally on a crate of mass 100 kg. One person is pushing from the right…

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Q: A box of weight 200 N is at rest on a floor where ??=0.4μs=0.4.  A rope is attached to the box and…

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Q: A 5.0 kg dog sits on the floor of an elevator that is accelerating downward at 6.00 m/s2. What is…

A: Given data:  Mass (m) = 5 kg Acceleration (a) = 6.00 m/s2, downward Required: The magnitude of the…

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A: when a body is in free fall, it will be experiencing only mg force in the vertically downward…

Q: A box with a mass of (18.2 + A) kg is pulled across a floor using a horizontal force of (48.1 + B)…

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Q: A person of mass M=80 kg stands on a scale inside an elevator to measure her apparent weight. What…

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Q: As part of a physics experiment, you stand on a bathroom scale in an elevator. even though you…

A: Given Actual weight W = 704 N Apparent weight W' = 894 N Acceleration a = 2.65 m/s2 , upward

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Q: 5. A5 kg box is being subjected to the following Forces: 5N North 11 N West 17 N South 3N East 14 N…

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Q: What is the tension in the cable that is lifting a 3500 kg elevator if the upward acceleration of…

A: Since the elevator is accelerating upward, the net force is given by F=T-mgma=T-mgT=ma+g Substitute…

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Q: Block 1 with mass 66 kg is sitting on a horizontal frictionless surface as shown below. It is…

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Q: A block of mass m1= 16.0 kg is on a frictionless table to the left of a second block of mass m2=…

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Q: The weight of a mass on Mercury, where the acceleration due to gravity is 3.61 m/s2, is 1235 N. What…

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Q: Two blocks each of mass 5 kg are fastened to the top of an elevator as in Figure P4.21. (a) If the…

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Q: The weight of an astronaut plus his space suit on the Moon is only 292 N. How much (in N) do they…

A: Weight on the Moon, Wm = 292 N Acceleration due to gravity on  the Moon, gm = 1.67 m/s2 Acceleration…

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: