An 8 kg block initially at rest is pulled to the right for 3 m with a force of 12 N over a surface. Determine its final speed if: (a) the surface has no friction and (b) the surface has a coefficient of kinetic friction of 0.15

Q: In the figure, a runaway truck with failed brakes is moving downgrade at 170 km/h just before the…

A:

Q: (a) Calculate the force needed to bring a 900 kg car to rest from a speed of 80.0 km/h in a distance…

A: Given: The mass of the car is 900 kg. The speed of the car is 80 kmh=22.22 m/s. The distance covered…

Q: A 62.0-kg skier is moving at 6.90 m/s on a frictionless, horizontal, snow-covered plateau when she…

A: Write the third kinematic equation and substitute the corresponding values to calculate the speed of…

Q: A 70 kg firefighter slides, from rest, 4.3 m down a vertical pole. (a) If the firefighter holds onto…

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Q: Two objects are at the top of a frictionless slope, object A has twice the mass of object B. If you…

A:

Q: A 60.0 kg skier with an initial speed of 12.0 m/s coasts up a 2.50 m high rise as shown above.  Find…

A: Given

Q: In the figure, a runaway truck with failed brakes is moving downgrade at 107 km/h just before the…

A: Given,

Q: You are travelling along a road at night at a constant speed of 20 m/s. Your maximum visibility…

A:

Q: skier is initially moving at 13.7 m/s on level ground as they approach a hill that is angled upward…

A: Initial velocity (u) = 13.7 msAngle of incline of hill (θ) = 15.8oLet the mass of skier = m Distance…

Q: It takes a minimum distance of 76.50 m to stop a car moving at 15.0 m/s by applying the brakes…

A: Solution:-

Q: A 19-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 32 N.…

A: GivenMass of the sled is Applied horizontal force is Initial speed of the of the sled is Final speed…

Q: An airplane is flying horizontally above the ground at a altitude of 1,966 m.  Its forward velocity…

A: Given:Dropping height of the package (h) = 1966 mAs the airplane moving in horizontal direction…

Q: The 10 kg mass has a velocity of 13 m/s at position 1 before coming to rest at position 2 a distance…

A: figure shows the given free body diagram.

Q: A football player is at the top of a 200 m high building. He decided to kick the ball (edge of the…

A: Given: The height (S) of the building is 200 m. The initial velocity (u) of the ball is 16 m/s. The…

Q: A hockey puck is at the top of a 10 m long slippery slope, that makes an angle of 30° to the…

A: h= 10 m v= 5 m/s First, find the verticle height  H= h sin θH=10 sin 30H =5 m   For the conservation…

Q: As shown in the figure below, a 2.25 kg block is released from rest on a ramp of height h. rough…

A: Given ;-  The mass of the block is m = 2.25 kg  The coefficient of friction μ= 0.510  The distance…

Q: A box with mass m = 1.5 kg is sliding with a speed of 4.0 m/s on a horizontal surface. When at x =…

A: Consider the following figure.   When the box lies at O, and the speed of the box is given as, u =…

Q: As shown in the figure below, a box of mass m = 31.0 kg is sliding along a horizontal frictionless…

A:

Q: In the figure, a block is released from rest at height d = 36 cm and slides down a frictionless ramp…

A: Initially, the block is at rest, its kinetic energy is zero, it has only its potential energy. When…

Q: As shown in the figure below, a 2.25 kg block is released from rest on a ramp of height h. rough…

A: Given Data:- Mass of the block is m=2.25 kg Length of the rough path is l=15.0 cm=15.0cm×1 m100…

Q: In Figure (a), a 1.8 N force is applied to a 4.4 kg block at a downward angle θ = 32° as the block…

A: Given: Mass of the block is 4.4 kg. Force acting on the block is of 1.8 N. Angle the force makes…

Q: An applied force of 122 N is exerted horizontally on an 28 kg box of cat in yulin. The coefficient…

A:

Q: A 6.0-kg block initially at rest is pulled to the right along a frictionless, horizontal surface by…

A:

Q: Starting from rest at the top, a child slides down the water slide at a swimming pool and enters the…

A: According to conservation of energy, the change in kinetic energy of the child must be equal to the…

Q: (a) Calculate the force needed to bring a 850 kg car to rest from a speed of 95.0 km/h in a distance…

A: Force is an acceleration mass multiply by the mass of the object.    Apply the equations of motion…

Q: A block initially at rest is pulled to the right along a frictionless, horizontal surface by a…

A: Given data The magnitude of the force is F=14 N The dispalcement of the block is d=7.0 m The speed…

Q: Buring World War 2, a military parachutist fell 0.37km from an airplane without being able to open…

A:

Q: Calculate the force needed to bring a 950 kg car to rest from a speed of 95.0 km/h in a distance of…

A:

Q: The 2-kg block is subjected to a force having a constant direction and a magnitude F = (300/(1+ s))…

A:

Q: A child on a sled with a total mass of 45.0 kg slides down an icy hillside with negligible friction.…

A: The vertical height of the hill is about 0.46 m. Here, we use conservation of energy and solve for…

Q: A box of mass 19 kilograms is sliding along at 1.4 meters per second. Roy pulls the box in the same…

A: The free body diagram is shown below

Q: A 32.0-kg  crate, starting from rest, is pulled across a floor with a constant horizontal force of…

A: Image-1

Q: Problem 10: The speed of a block traveling on a horizontal frictional surface changes from v; = 16…

A: Given data: The initial velocity of the block, vi=16 m/s. The final velocity of the block, vf=11…

Q: In the figure, a runaway truck with failed brakes is moving downgrade at 106 km/h just before the…

A: Given   Velocity , V = 106 km/h  Mass, M = 1.4× 104 Kg

Q: An applied force of 14.3 N acts on a 2.50 kg mass that is initially at rest. Over a distance of 2.18…

A:

Q: A stone with a weight of 4.89 N is launched vertically from the ground level with an initial speed…

A:

Q: A box with mass m = 1.5 kg is sliding with a speed of 4.0 m/s on a horizontal surface. When at x =…

A: Given that: m=1.5 kgv=4 m/sf(x)=-(10+40x) Nd=?Wf=Work done by friction

Q: At what initial speed should a box of mass m be thrown parallel to the surface of the inclined plane…

A:

Q: A child slides down a snow‑covered slope on a sled. At the top of the slope, her mother gives her a…

A: From the law of conservation of energy,

Q: A 3 kg block travels along a horizontal surface with a coefficient of kinetic friction of 0.28 at a…

A: Given: A 3 kg block travels along a horizontal surface with a coefficient of kinetic friction of…

Q: Starting from rest, a 92-kg firefighter slides down a fire pole. The average frictional force…

A:

Q: A 2.5 kg mass is initially at rest on a horizontal surface. An applied force acts in the +x…

A: Given , mass (m) = 2.5 kg initially at rest ,initial velocity = 0  displacement (s) = 1.5 m speed at…

Q: Calculate the force (in N) needed to bring a 1050 kg car to rest from a speed of 80.0 km/h in a…

A:

Q: A 121.79-kg skier starts with an initial speed of 24.77 m/s and coasts up a H=8.92-m-high rise as…

A: Mass of skier (m) = 121.79 kg Initial speed (u) = 24.77 m/s H = 8.92 m speed at top (v) = 10.21 m/s…

Q: An experiment is conducted where a metal ramp is placed on a level surface, with the ramp’s surface…

A: Given:-  The mass of the block is m = 1.0 kg  The  initial height of the block is h = 3 m  The angle…

Q: A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls…

A:

Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.