You and your friend Peter are putting new shingles on a roof pitched at 25 ∘ . You're sitting on the very top of the roof when Peter, who is at the edge of the roof directly below you, 5.4 m away, asks you for the box of nails. Rather than carry the 2.5 kg box of nails down to Peter, you decide to give the box a push and have it slide down to him.  If the coefficient of kinetic friction between the box and the roof is 0.50, with what speed should you push the box to have it gently come to rest right at the edge of the roof?

Q: 20 kg box sits on a level floor. The box does not move until you push on it with a horizontal force…

A:

Q: A student stands in an elevator that is continuously accelerating upward with acceleration a. Her…

A:

Q: Fig. 2 F1 +y 55.0 - +x 54.0 N F2 2. Fig. 2 shows a 25.0-kg crate that is initially at rest. Note…

A: Given: Mass of crate: 25 kg kinetic friction: μk=0.350 Force F1 has two components in x and y…

Q: A rope is attached to a box with mass 122 kg and Person A is pulling the box to the right on the…

A: Given information: The mass of the box (m) = 122 kg The tension in the rope when the person A is…

Q: You are riding in an elevator on the way up to your apartment. The elevator is accelerating upward…

A: Given: Upward acceleration of elevator is 1.2 m/s2 Mass is 30 kg Kinetic friction coefficient is…

Q: int at rest. Determine the tension developed in the cable. The coefficient of kinetic friction…

A:

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

A:

Q: A rug (mass of 20.0 kg) is sitting on a slope with an angle of 20 degrees. A person (mass of 40.0…

A:

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…

A:

Q: A skier with mass of 55 kg (including winter clothes and ski equipment), slides straight down a…

A: Given:mass of skier, m = 55 kg angle of inclination, θ = 50°

Q: A 12.1 kgkg box sits on a horizontal table. A string with tension 30.6 NN pulls on the box to the…

A:

Q: You are riding in an elevator on the way to the eighteenth floor of your dormitory. Near the end of…

A:

Q: Four blocks with masses m1=5.00kg, m2= 5.10kg, m3= 7.00kg, m4= 7.20kg are pulled on a horizontal,…

A: solution:   Given Values, Masses: m1=5.00 Kgm2=5.10 Kgm3= 7.00 Kgm4= 7.20 KgAngle (θ)=34°Force (F) =…

Q: A circus gymnast hangs from two ropes attached to the ceiling while lowering himself to the floor at…

A: Given: The angle of the first rope with vertical is 28.3°. The tension in the first rope is 352 N.…

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

A:

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

A:

Q: You are at the grocery store pushing on a shopping cart. The mass of the cart including all the…

A: Given Data : The mass of the cart is given as mc = 26 Kg. The coefficient of friction between the…

Q: A 10.0-kg box is at rest on a concrete floor. The coefficient of static friction between the box and…

A: mass, m = 10 kg static friction coefficient = 0.75  kinetic friction coefficient = 0.62  Force, F =…

Q: The drawing shows a 20.5-kg crate that is initially at rest. Note that the view is one looking down…

A:

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

A:

Q: Mary applies a force of 78 N to push a box with an acceleration of 0.49 m/s2. When she increases the…

A: The applied force in first case is 78 N and acceleration is 0.49 m/s2. The applied force in second…

Q: A student's backpack, full of textbooks, is hung from a spring scale attached to the ceiling of an…

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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…

A:

Q: You are riding in an elevator on the way to the 18th floor of your dormitory. The elevator is…

A: Given The elevator upward acceleration = 1.90 m/s2 Total mass of the box                    = 36.0…

Q: A block M₁ of mass 10.5 kg sits on top of a larger block M₂ of mass 20.5 kg which sits on a flat…

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Q: A small block of mass m2 is placed on top of a large block of mass m1 at rest on a horizontal…

A: When the body 2 starts moving the body 1 will tend to remain at rest with respect to earth due to…

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…

A:

Q: A block with a mass of 3.44 kg is sliding down an inclined surface. The surface makes an angle of…

A: The expression for the coefficient of kinetic friction by equating the forces along inclined surface…

Q: Sammy is doing a strength testing session on the turf in preparation for the upcoming basketball…

A: Mass of sled (m) = 105 kgCoefficient of static friction (us) = 0.3Sammy apply only horizontal…

Q: A hockey puck ( mass 160 grams ) slides across the ice. It's initial velocity is 10 m/s. If the…

A: ⁰

Q: You are out on a hike and come across an unfortunate scene: a fellow hiker has fallen off a ledge.…

A:

Q: ou go trick-or-treating with your friends and end up with more candy than you know what to do with.…

A: The magnitude of normal force acting on the bag  is, FN=mg-Fsinθ=8.7 kg9.8 m/s2-62 Nsin57°=33.3 N…

Q: You are driving a car at a constant speed of 14.0 m/s along a straight level road. As you approach…

A: The initial velocity of the car is u = 14 m/s. The final velocity of the car is v = 0 m/s. The…

Q: Laila, who is a part of a critical patient's medical team was responsible for pushing a cart…

A:

Q: A 1.9 kg otter starts from rest at the top of a muddy incline 84.1 cm long and slides down to the…

A: Given that,The mass of otter : m = 1.9 (kg)The length of muddy inclination : d = 84.1 (cm)The time…

Q: You are quite excited with the lesson in friction that you learned in Physics 1A that you decide to…

A: Given Data:- Mass of the glass cup is m=0.15 kg Initial velocity of the cup is vi=2.8 m/s Final…

Q: Consider a wooden ramp angled 30.1 degrees above horizontal. If a 10.2-kg wooden block is given a…

A: Draw the free-body diagram of the block.

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

A: The mass m=56 kgThe force F=88 NThe angle θ=410

Q: A 10.2-kg box is sliding across a horizontal floor. It has an initial speed of 1.25m / s and the…

A: Given    A 10.2-kg box is sliding across a horizontal floor. It has an initial speed of 1.25m / s…

Q: A 1250 kg boat is traveling at 90 km/h when its engine is shut off. The magnitude of the frictional…

A: Using Newton’s second law of motion,

Q: You are helping your friend unload their moving truck. You are starting to get lazy, so you just set…

A:

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: