The 40 kg crate is traveling to the right with an initial v0=1.2 m/s, when a person begins to pull on a rope with 200 N at an angle 30 degrees from the horizontal. The coefficient of kinetic friction is 0.3. Draw a free-body diagram of the block and calculate all forces on it. What is the speed of the crate after it is pulled 20 m? How much thermal energy was created? Do not use kinematics to solve the problem. Use concepts of work and kinetic energy.

Q: How much gravitational potential energy (in J) (relative to the ground on which it is built) is…

A: Potential energy of an object is defined as the energy possessed by the object by virtue of its…

Q: A donkey is pulling a sled at a velocity of 3.5 m/s. If the donkey’s power output is 890 W, what is…

A: Product of force and velocity leads us to power output of an object. P = F • v

Q: A 280 g block slides down an incline plane of inclination angle 14 degrees with a constant speed.…

A: Given a 280 g (m) block slides down an incline plane of inclination angle 14 degrees(θ) with a…

Q: A box of mass m = 51 kg is being pulled by a constant force F = 101 N at an angle q = 15 degrees.…

A: Friction is given as product of normal and friction coefficient.

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

A: Given : height of pole, h = 4.3 m              mass of firefighter, m = 70 kg              average…

Q: A: A 3 Kg mass of a small train (game) moves in an acceleration of 0.9 m/s2. Compute the work done…

A: Given Mass of train m=3kg acceleration a=0.9m/s2 ditance moved d=2m

Q: It takes a student t= 9.4 s to push a block m=14 kg at a constant velocity over a distance of d= 8.6…

A:

Q: A 65.0 kg base runner begins his slide into second base when he is moving at a speed of 4 m/s. The…

A: (a) Mechanical energy lost by friction is equal to the change in kinetic energy ∆E=12m∆v2=1265.0 kg4…

Q: A movie stunt performer is filming a scene where he swings across a river on a vine. The safety crew…

A: The minimum tension force in the vine at the bottom can be given by T=mg+mv2r=mg+v2r

Q: An online video daredevil is filming a scene where he swings across a river on a vine. The safety…

A: Mass of the daredevil m = 86 kg Length of the vine L = 11 m Speed of the daredevil at the bottom of…

Q: A block is given a short push and then slides with constant friction across a horizontal floor.…

A: Let a block slides over the floor as shown below,  Here F is the force applied in a short push. fr…

Q: A 76-kg base runner begins his slide into second base when he is moving at a speed of 3.5 m/s. The…

A:

Q: The Outlaw Run roller coaster in Branson, Missouri, features atrack that is inclined at 81° below…

A: Given,

Q: A 13000 N elevator is lifted with a force of 16000 N against 2000 N of friction a distance of 19…

A:

Q: 1. In each situation, identify the forces and specify whether the work done by the respective forces…

A: a) 1. spring force - Negative  2. Force of boy - positive  b) (weight) gravitational force -…

Q: A 72-kg base runner begins his slide into second base when he is moving at a speed of 3.0 m/s. The…

A: Given,

Q: A sledge loaded with bricks has a total mass of 19.0 kg and is pulled at constant speed by a rope…

A:

Q: A 11 kg object begins by moving at a speed of 2 m/s. A force of 33 N is then applied to it while the…

A:

Q: m h2 h1

A: mass of block (m) = 10 kg Distance along the flat muddy section (d) = 1 m coefficient of kinetic…

Q: An online video daredevil is filming a scene where he swings across a river on a vine. The safety…

A: Let the minimum tension force the vine is able to support be T.Given,            m = 90kg…

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

A:

Q: A sledge loaded with bricks has a total mass of 17.0 kg and is pulled at constant speed by a rope…

A: Given: The mass of the bricks is 17 kg. The angle of the tension with horizontal is 20.5° The…

Q: A sledge loaded with bricks has a total mass of 18.0 kg and is pulled at a constant speed by a rope…

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

Q: A 70 ?? skier starts to slide from ? = 25 ? above the jumping ramp as shown in the figure and jumps…

A:

Q: b) Use the work-energy theorem to calculate the velocity. 5. A truck traveling down the mountain…

A: According to work energy theorem Work done = change in kinetic energy

Q: Your cat "Ms." (mass 7.00 kg) is trying to make it to the top of a frictionless ramp 2.00 m long and…

A: The below figure represent the motion of the cat along the ramp.

Q: Adult cheetahs, the fastest of the great cats, have a mass of about 70 kg and have been clocked to…

A:

Q: For each of the situations given, state whether frictional forcesdo positive, negative, or ze ro…

A: Work done by frictional force in different cases.

Q: a) What is the acceleration of the box? b) How much work is done by the frictional force on the…

A: Given: Mass of a crate, m=12.0Kg Initial speed, vi=2.5m/s Pushing force, F=150N The incline angle,…

Q: (a) The Eskimo pushes the same 50.0-kg sled over level ground with a force of 1.70 x 102 N exerted…

A:

Q: A 3.0 kg lunchbox is sent sliding over a frictionless surface, in the positive direction of an x…

A: a) The lunchbox’s speed at t = 1s can be determined by the graph’s slope at t = 1 s. Here, x and t…

Q: An airplane of mass 1.50 × 104 kg is moving at 60.0 m/s. The pilot then increases the engine’s…

A: a. No. The change in kinetic energy of the airplane will be equal to the net work done by all the…

Q: A 5kg block is pushed up a 40° incline at constant velocity of 3m/s. The force pushing on the block…

A: Given: A 5kg block is pushed up a 40° incline at constant velocity of 3m/s. The force pushing on the…

Q: (a) The Eskimo pushes the same 50.0-kg sled over level ground with a force of 2.40 x 102 N exerted…

A: Given, mass of the sled, m=50 Kg Applied force , F=2.4*102 N displacement of the sled, x=6.45 m Net…

Q: A 50-kg block is pushed a distance of 5.0 m across a floor by a horizontal force FP whose magnitude…

A: Given that:- Mass of block=m=50kg

Q: A ski starts from rest and slides down a 28° incline 85 m long.  (a) If the coefficient of friction…

A:

Q: Problem 1- A 70 kg skier starts to slide from H = 25 m above the jumping ramp as shown in the figure…

A:

Q: L A tractor is hitched to a sled loaded with firewood as shown. The total weight of the sled and…

A: Given  Weight of sled and the load W= mg=14700N Magnitude of force that tractor exerts FT =5000N…

Q: 30

A: The work done on the object is given by, Work done=force×Distance  Power can be given by the…

Q: A movie stunt performer is filming a scene where he swings across a river on a vine. The safety crew…

A: mass, m = 86 kg  length, r = 11 m  velocity, v = 8.2 m/s

Q: A 1500 kg car begins sliding down a 5.0 inclined roadwith a speed of 30 km/h. The engine is turned…

A: a. The only forces acting on the car are a net frictional force and frictional force when the engine…

Q: A 8.00 kg block of ice, released from rest at the top of a 1.50-m-long frictionless ramp, slides…

A:

Q: A movie stunt performer is filming a scene where he swings across a river on a vine. The safety crew…

A: length of vine (L) = 11 m mass of performer (m) = 90 kg speed at the bottom of the swing (v) = 7.40…

Q: A 61-kg base runner begins his slide into second base when he is moving at a speed of 3.9 m/s. The…

A: Given: The mass of runner m = 61 kg. Speed of runner v1 = 3.9 m/s. Coefficient of friction = 0.7