A 55 kg ice skater is gliding along at 3.5 m/s. Five seconds later her speed has dropped to 2.9 m/s. What is the magnitude of the kinetic friction acting on her skates?

Q: Mary applies a force of 70 N to push a box with an acceleration of 0.60 m/s2. When she increases the…

A: The forces acting on the box are the force applied by Mary in the direction of motion of box and…

Q: Traveling at a speed of 12.1 m/s, the driver of an automobile suddenly locks the wheels by slamming…

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Q: You are working for a shipping company. Your job is to stand at the bottom of an 8.0-m-long ramp…

A: Given data: The coefficient of kinetic friction is μk=0..30 The length is l = 8.0 m long

Q: A hockey puck having initial speed of 3.8 m/s comes to rest after a distance of 7.6 m. What is the…

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Q: Starting from rest, a 28.0 kg28.0 kg child rides a 8.75 kg8.75 kg sled down a frictionless ski…

A: Given  Mass of the child mc=28.0kg Mass of the sled ms=8.75kg Total mass M=mc+ms M=28.0+8.75…

Q: You go to the playground and slide down the slide, a 3.0-m-long ramp at an angle of 40° with respect…

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Q: Option #2: A roller coaster car is at the top of a huge hill and is at rest briefly. Then it rolls…

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Q: A unicorn running on a beach at 7 m/s changes speed at a constant rate of 3.6 m/s2 over a period of…

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Q: A 10 kg-block moves on a smooth horizontal surface with a speed of 10 m/s and slides into another…

A: Given data: Mass = 10 kg Initial speed = 10 m/s Coefficient of friction = 0.25 Need to determine the…

Q: A large crate has a mass of 120 kg and sits on a horizontal floor. You push on the crate with a…

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Q: F

A: Given: Mass m1 = 4.7 kg. Mass m2 = 2.4 kg. Upward force F = 6.4 N. Downward acceleration (a) = 4.7…

Q: is at rest on a horizontal floor.  A 22 kg child sits on top of the box.  A person pushes the box…

A: Net force = ma

Q: ength of the barrel, and it exits the barrel with a speed of 730 m/s. Assuming that the acceleration…

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Q: One end of a rope is tied to a 11 kg hanging weight. The rope goes over a pulley and the other end…

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Q: The figure below is for a 6 kg box on a horizontal floor. Initially, you are pushing horizontally on…

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Q: I need help with this Hw Problem.

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Q: It's a snowy day and you're pulling a friend along a level road on a sled. You've both been taking…

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Q: A sled and rider have a total mass of 50.5 kg. They are on a snowy hill. The coefficient of kinetic…

A: Given: Total mass of sled and rider is 50.5kg. The coefficient of kinetic friction is 0.170. The…

Q: Ronnie and Smythe, who are thieves, are sliding a 300 kg bank safe across a bank floor, which is…

A: The frictional force on safe is given by

Q: A block with a mass of 6.47 kg is on a horizontal surface that has friction. A string is pulling…

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Q: A cow is pushing its baby from side of the farm to another. The floor of the farm is not…

A: we know that the net force is equal to the product of the mass and acceleration. the acceleration is…

Q: A hockey puck is hit on a frozen lake and starts moving with a speed of 15.0 m/s. If the coefficient…

A: initial velocity, u = 15 m/s  friction coefficient, μk =  0.2  time, t = 5 s

Q: A 1500kg car is driving on the road at a speed of 15 m/s. The driver applies the brakes, bringing…

A: The minimum distance the car needs to travel to stop (braking distance) is given by, d=v22μg Here, v…

Q: Bonnie and Clyde are sliding down a 301 kg bank safe across the floor to their getaway car. The safe…

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Q: An empty box is travelling on the conveyor with 0.2 m/s, then 12 kg package is dropped into this box…

A: please see the next step for solution

Q: A 68.5 kg person is standing inside an elevator. The elevator is going from the 1st floor to the 9th…

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Q: A 2110 kg car traveling at 8.4 m/s collides with a 2730kg car that is initially at rest at the…

A: Mass of first car = m = 2110 kg Mass of second car = M = 2730 kg Distance traveled = s = 3.3 m…

Q: Somone is standing on a piece of cardboard holding a wire that is attached to a vehicle.  The…

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Q: A stacked pair of books with masses m1= 1.5 kg (bottom book) and m2 = 1.0 kg (top book) are tossed…

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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: Three blocks (as shown in the figure) are released from rest and they start to accelerate with a…

A: Step 1: here we have derived the equation of motion of the masses Step 2: here we have calculated…

Q: Black Panther (mass 80.0 kg) is trying to save Spiderman (mass 70.0 kg) and Supergirl (mass 60.0 kg)…

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Q: A box of mass 7.3 kg is slid along the floor. The initial speed of the box is 6 m/s and it comes to…

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Q: An object is given an initial speed of 5 m/s on a horizontal surface.It slides 10 m on the…

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Q: Your friend asks for help moving a box across the apartment floor and tells you that the box weighs…

A: The static frictional force on the box Fs=μsW=0.42·422=177.24 N The kinetic frictional force on the…

Q: 2 crates are connected to each other by a rope. One crate(m=17kg) is sitting by the ledge of a…

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Q: Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. The scale reads 830 N for the…

A: Apply newton’s second law of motion along the motion of the lift, and substitute 95kg, for m,…

Q: A car is being driven along a country road on a dark and stormy night at a speed of 14 m/s. The…

A: Given information: The initial velocity of the car, u=14 m/s The distance from the tree where the…

Q: A block M1 of mass 10.0 kg sits on top of a larger block M2 of mass 20.0 kg which sits on a flat…

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Q: A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a…

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Q: A hockey puck having initial speed of 2.5 m/s comes to rest after a distance of 8.0 m. What is the…

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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: