A lightrail train from downtown travels at 30 miles per hour. Railcar A has a weight of 17 tons and railcar B has a weight of 21 tons. Find the amount of time required to stop if a force of 6000 lbs applied when breaking. Assume gravity is 32.2 ft/s. It takes seconds to stop the train.

Q: Two cables are pulling on a box, sliding it across the (frictionless) floor.  One cable pulls to the…

A:

Q: A student weighs 200 N. If he is in an elevator that is accelerating upward at 2.00 m/s/s, what will…

A: Given that:-Weight of student=mg=200NUpward acceleration, a=2.00m/s2We know thatApparent weight of a…

Q: A girl with a mass of 52kg rides a skateboard with a mass 1.5kg. She uses her foot to apply a force…

A: Given: The mass of the girl is 52 kg. The mass of the skateboard is 1.5 kg. The acceleration of the…

Q: A lamp hangs vertically from a cord in a descending elevator that decelerates at 1.9 m/s2. (a) If…

A:

Q: book (m = 3.50 kg) is at rest on a table. Maria pushes down on the book with a 10.0 N force. If the…

A:

Q: A single-celled animal called a paramecium propels itself quite rapidly through water using its…

A: Newton's second law of motion states that the acceleration of an object is directly proportional to…

Q: A driver drives his 1225.0-kg vehicle heading north and then turns east at an intersection. It…

A:

Q: 1. A person is standing on a building with a height h. His mass is m and acceleration due to gravity…

A: From the question, it is given that- Height of building = h Initial speed of person: u = 0 m/s Mass…

Q: A rope exerts a constant horizontal force of 280 N to pull a 50kg crate across the floor. the…

A:

Q: A child’s model boat, when placed in a creek, accelerates from rest at 1.4 m/s2. If the river is…

A:

Q: A force of 1.8 N is applied horizontally to a 683 g cereal box that is at rest on a horizontal…

A: As the box is not moving vertically that means the vertical forces are balanced that is : N = mg…

Q: A 2500 kilogram truck is moving initially with a velocity of 10.00 meters per second. To change its…

A:

Q: A child’s model boat, when placed in a creek, accelerates from rest at 1.51 m/s2. If the river is…

A: Initial velocity = 0 msAcceleration (a) = 1.51 ms2Force (F) = 0.79 N

Q: A 12 N bag is hanging with a cord. How much is the least tension exerted by the cord to stay the bag…

A: Given,  mg = 12 N We need to calculate,  Required least tension =?

Q: Because you wanted space, you woke up on unknown planet. While thinking you dropped a 150-g stone…

A:

Q: Timmy is done placing his things in a big box and ready to transfer to his new condo unit. The…

A: Given Angle of elevation of the ramp is given as θ=24.6° Mass of the box is m=47.5 kg Coefficient of…

Q: After a day of testing race cars, you decide to take your own 1460.7 kg car onto the test track.…

A:

Q: An elevator has a scale that measures the normal force between the contents and the floor. What…

A: Given:Mass,m= 960 kg Accelerating,a=1.5 m/s2Find  force will the scale.Now, Now,The elevator is…

Q: Problem 9: A car has a mass of 1010 kg and is moving in a straight line at a speed of 56.1 km/h.

A:

Q: A single-celled animal called a paramecium propels itself quite rapidly through water using its…

A: Given: Drag coefficient b = 0.330 kg/mSpeed v = 0.000137 m/sNow, the drag force is fd = -bv2As it is…

Q: A student with a mass of 68 kg gets on a ferris wheel that rotates at a constant speed. When the…

A: Since, student is in circular motion so, he need a centripetal force which is always towards the…

Q: A firefighter who weighs 124 lb slides down an infinitely long fire pole that exerts a frictional…

A:

Q: A woman pushes an initially stationary 11.3 kg gift up a 15.90 ramp a distance of 7.21 m. If she…

A:

Q: An astronaut named Johnny is driving to their rocket when they suddenly need to break. The car…

A:

Q: An airplane slows to a stop as it moves along the runway.  Its mass is 3.50 x 105 kg, its speed is…

A:

Q: A teacup fell was left on the wing of a fighter jet and did not fall until the jet was already very…

A: When object falls with a constant velocity the drag force on it is equal to the gravitational force…

Q: You hang a book bag on a spring scale and place the bag on a platform scale so that the platform…

A: Answer:   The magnitude of the force that exerts on the bag is given as:

Q: A 6110-kg bus traveling at 20.0 m/s can be stopped in 24.0 s by gently applying the brakes. If the…

A: Given:- The mass of the  Bus = 6110 kg  The speed of the bus = 20.0 m/s  The time to stop bus when…

Q: A 6.0-lb stroller resting on a horizontal floor is pulled by a 85-lb boy with a constant force of…

A: Given mass of stroller ms = 6 lb = 2.72 kg mass of boy mb = 85 lb = 38.56 kg value of Force F = 75…

Q: An elevator, moving upward, decreases in speed from 8.41 m/s to 1.70 m/s in 2.02 s. Assuming…

A:

Q: A 328-kg motorcycle is accelerating up along a ramp that is inclined 30.0° above the horizontal. The…

A:

Q: A 1640-kg car is traveling with a speed of 17.6 m/s. What is the magnitude of the horizontal net…

A: Given data:  Mass (m) = 1640 kgInitial velocity (v0) = 17.6 m/sFinal velocity (v) = 0 m/sDistance…

Q: Freaks yon. Consider two blocks, A and B, where m, < mp. They are pulled by a horizontal force with…

A:

Q: A train has a mass of 1.0x107 kg. If the locomotive can exert a constant traction  of 6.8x105 N. How…

A:

Q: A 26.84 kg dog jumps on a 86.86 kg bed. As the dog walks around on the bed, what is the average…

A: mass of dog = m1 =26.84 kg mass of bed = m2 = 86.86 kg

Q: A 9.12kg object speeds up from 16m/s to 46.53m/s over a distance of 117.23m. What is the…

A:

Q: Arshia is helping Jana move. Jana has to load a 265 kg box of chocolates and coffee up an incline of…

A: NOTE : I took g=9.81 m/s2 [as not mentioned]so answer is slightly different , for your answer please…

Q: An astronaut named Johnny is driving to their rocket when they suddenly need to break. The car…

A:

Q: Aircraft carriers use catapults to launch jets from their deck. One such catapult accelerates a…

A:

Q: There is a worker that slides a heavy box up a ramp into a truck. The box has a mass of 70 kg. The…

A:

Q: A steam catapult applies a very large force to supplement the engine thrust of a jet fighter as it…

A: We have a jet of mass m=3850 kg which needs to start from rest (initial velocity u=0) to reach a…

Q: Superman is applying a 17,000 N horizontal force to try and stop a speeding locomotive. This train…

A:

Q: A firefighter who weighs 145 lb slides down an infinitely long fire pole that exerts a frictional…

A: