A packing crate with mass 80.0 kg is at rest on a horizontal, frictionless surface. At t = 0 a net horizontal force in the +x-direction is applied to the crate. The force has a constant value of 80.0 N for 12.0 s and then decreases linearly with time so it becomes zero after an additional 6.00 s.   What is the final speed of the crate, 18.0 s after the force was first applied?

Q: Starting from rest, a 99-kg firefighter slides down a fire pole. The average frictional force…

A:

Q: A 1000 kg automobile is moving at 30 m/s at a height of 5.0 m above the bottom of a hill when it…

A: Mass ( m ) = 1000 kg  Height ( hi ) = 5 meter Velocity ( uf ) = 30 m/s

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: Assume that the force of a bow on an arrow behaves like the spring force. In aiming the arrow, an…

A:

Q: A 5 kg block is at rest on a horizontal floor, and then you pull it with a cord that exerts a…

A:

Q: A force F → = ( c x − 3.00 x 2 ) i ^  acts on a particle as the particle moves along an x axis, with…

A: W=∫0 m2.8 mFxdx=∫0 m2.8 mcx-3.0x2dx=cx22-x32.80=3.92c-21.95

Q: A 9.50 kg block is at rest on a horizontal floor, and then you pull it with a cord that exerts a…

A: GivenMass m = 9.50 kgInitial velocity u = 0 m/sForce applied F = 12.0 NAngle θ = 24.0o Coefficient…

Q: A 600 kg roller coa sters starts at A and moves to B and then to C under the influence of gravity…

A:

Q: F(x) (N). 6.0 4.0 2.0 0 -2.0 -4.0 2.0 4.0 6.0 8,0 x(m) A small block with mass of 214 grams is…

A: Step 1:Step 2:Step 3: Step 4:

Q: A 49.60-kg skier with an initial speed of vi-34.00 m/s coasts up a H=17.25-m-high rise with a slope…

A:

Q: A block of unknown mass is placed on a ramp at a height h above the ground as shown.  The block is…

A:

Q: An object with a mass of 1.93 kg is initially at rest upon a horizontal, frictionless surface. An…

A: Given data: Mass of an object is, m= 1.93 kg The object is initially at rest, vi = 0 The applied…

Q: A 17-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 30 N.…

A: Given data: mass m = 17 kg force F = 30 N speed v = 1.9 m/s displacement d = 8.6 m

Q: An object starts from rest at the origin and moves along the x axis subject to the force shown in…

A: Mass of object M=37 kg Spacing along x is 2m. Spacing along F is 3N.

Q: A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.875 m/s encounters a rough horizontal…

A:

Q: A 3kg block slides along a floor with coefficient of kinetic friction UK = 0.3, initially moving at…

A:

Q: UAB PH201 student on Spring Break decides to test what she has learned about Newton's Laws on the…

A: mass = m = 57kg initial speed = V0 = 0 m/s time = t = 2.5 Seconds angle = 18.6 degrees force along…

Q: A student pushes a physics textbook of mass 1.11 kg across a table with a horizontal force of 5.81…

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: An applied force of 43 N directed at an angle of -11.6 degrees with respect to the +x direction acts…

A:

Q: A 2.1 x 103-kg car starts from rest at the top of a 5.5-m-long driveway that is inclined at 15° with…

A:

Q: A 25.0-kg crate is being pushed across a floor. The net horizontal force on the crate is 59.0N.…

A:

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 2.0 kg object moving along the x-axis experiences the force shown in the figure. The object's…

A: Please note : As per answering guidelines I can answer first question and its sub-parts only. Please…

Q: A 19-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 21 N.…

A: The mass of the sled: m = 19 kg. The horizontal force: Fx = 21 N. The final speed of the sled: v =…

Q: A boy pulls a bag of baseball bats across a ball field toward theparking lot. The bag of bats has a…

A: The acceleration is,

Q: puck’s

A: The work-energy theorem can be applied here, work done=change in kinetic energy Work done by a body…

Q: A 45.0 kg object is pushed up an incline as shown with a horizontal force of 300.0 N. The object is…

A:

Q: If a 2.1 kg object is initially at rest on a frictionless, horizontal surface and subjected to a  14…

A:

Q: A roller-coaster vehicle has a mass of 505 kg when fully loaded with passengers (see figure).   (a)…

A: a) The expression for force of the track on the vehicle is F=mg+v2r Substitute values in the above…

Q: A 2.0- kg box is moving at constant speed of 2.0m/s on a frictionless horizontal floor. You apply a…

A: Given Mass of a bix = 2.0 kg  box is moving at constant speed = 2.0m/s frictionless horizontal floor…

Q: At the start of a race, a four-man bobsled team pushes their sled as fast as they can along a 50 m…

A: Mass, m = 325 kgFriction force, F = 60 NPull force, P = 964.079 N at 15°Displacement, d = 50 m

Q: A hockey puck with mass 0.166 kg is pushed across the ice with a constant force of 0.89 N. The…

A:

Q: A man pushing a crate of mass  m = 92.0 kg  at a speed of  v = 0.860 m/s  encounters a rough…

A: SOlution: Given that m = 92 kgv = 0.86 m/sL = 0.65 mcoefficient of friction = 0.36 F = 279 N

Q: Whether or not an object (such as a plate, glass, or bone) breaks upon impact depends on the average…

A: An object falling freely accelerates to speed v after falling h height which is given by:

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.