A 30-N stone is dropped from a height of 10 m and strikes the ground with a speed of 13 m/s. What average force of air friction acted on the stone as it fell?

Q: A 3kg steel ball strikes a wall with a speed of 6 m/sec at an angle of 300 with the surface. It…

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Q: In a railroad yard a 35,000 kg boxcar moving at 6.6 m/s is stopped by a spring-loaded bumper mounted…

A: When the car stops completely then all of its kinetic energy is stored as potential energy in the…

Q: Q13) The kinetic energy of a car moving along a horizontal road is 120 kJ. The driver applies the…

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Q: Mitch throws a 98–gram lump of clay at a 639 g target, which is at rest on a horizontal surface.…

A: mass of clay lump = 98 g mass of target = 639 g initial speed of the target = 0 m/s distance moved…

Q: A 60° .... . A B

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Q: A 6.8-kg toboggan is kicked on a frozen pond, such that it acquires a speed of 1.9 m/s. The…

A: We are allowed to answer only the first question. For solutions to other questions, please re-post…

Q: If the four Pratt & Whitney PW4000 turbofan engines of a Boeing747-400 aircraft do 5.62 Million…

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Q: In a railroad yard a 35,000 kg boxcar moving at 7.2 m/s is stopped by a spring-loaded bumper mounted…

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Q: A mass and spring are arranged on a horizontal, frictionless table as shown in Figure P6.58. The…

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Q: Gayle runs at a speed of 4.70 m/s and dives on a sled, initially at rest on the top of a…

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Q: The figure above shows a water-slide ride in which a glider is shot by a spring along a…

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Q: An 8.5-kg block is pushed along a horizontal rough surface by a 40-N force inclined at 20° with the…

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Q: A 263 g ball of clay falls onto a vertical spring. The spring constant k = 2.52 N/cm.  The clay…

A: Given: mass of the ball, m=263 g=0.263 kg spring force constant, k=2.52 N/cm spring compression,…

Q: An 8.5-kg block is pushed along a horizontal rough surface by a 40-N force inclined at 20° with the…

A:

Q: A block of mass m1=2.4kg is connected to a second block of mass m2=1.8kg. When the blocks are…

A: Given information:m1 =2.4kgm2 =1.8kgdistance moved by the masses, d = 0.5 mkinetic friction between…

Q: Gayle runs at a speed of 4.35 m/s and dives on a sled, initially at rest on the top of a…

A: Given Data Mass of Gayle=mG=50 kgMass of Gayle's brother=mGB=30 kgMass of Sled=mS=5 kgInitial…

Q: A 79 kg man lying on a surface of negligible friction shoves a 50g stone away from himself, giving…

A: Given Mass of Person is M=79 kg Mass of stone is m=50×10-3 kg Initial total momentum is pi=0

Q: A dart gun contains a spring of spring constant k = 17 N/m which is used to fire a dart of mass m.…

A: From the conservation of energy

Q: An 8.5-kg block is pushed along a horizontal rough surface by a 40-N force inclined at 20° with the…

A:

Q: A 30 kg box has an initial velocity of 10 m/s to the right. A person applies a force of 300 N to the…

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Q: A car's bumper is designed to withstand a 6.12-km/h (1.7-m/s) collision with an immovable object…

A: Given Initial velocity u = 1.7 m/s Mass m = 890 kg  Final velocity v = 0 Displacement S = 0.255 m

Q: a 4.5 kg dog stands on an 18 kg flatboat at distance D=6.1 m from the shore. It walks 2.4 m along…

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Q: A locomotive of mass m= 1.134 × 10 kg uses 37.8 kW of power to accelerate at a constant rate for…

A: Let v be the velocity of the locomotive after 15 s, u be the initial velocity, F be the force, m be…

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: Mitch throws a 114—gram lump of clay at a 517 g target, which is at rest on a horizontal surface.…

A: Unless an external force is applied, the overall momentum of two or more bodies in an isolated…

Q: A spring, with spring constant k = 1960 N, is mounted vertically on a table as shown in the figure.…

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Q: 0.50 kg - U, =1.5 m/s ir= 0.95 m 2.0 m 1.9 m An engineer is working on a new roller coaster, and he…

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Q: Calculate the final speed (in m/s) of a 106 kg rugby player who is initially running at 7.50 m/s but…

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Q: A 3.09-kg particle is subject to a net force that varies with position as shown in the figure. The…

A: Given: The mass of the particle is m=3.09 kg. According to work energy theorem: Kinetic…

Q: After pushing a 27.8 kg kid and tricycle over 8.2 m of smooth, level sidewalk from rest, the "combo"…

A: Given information: Here, m is the mass of the combo (kid+tricycle), d is the distance travel by the…

Q: A force in the +x-direction with magnitude F(x) = 18.0 N - (0.530 N/m)x is applied to a 6.00 kg box…

A: Given: The force is Fx=18.0 N-0.530 N/mx. The mass of the box is 6.00 kg. The distance covered is…

Q: An 8.5-kg block is pushed along a horizontal rough surface by a 40-N force inclined at 20° with the…

A: Mass of the block is m = 8.5 kg Applied force is F = 40 N Angle of force with the horizontal is 20…

Q: What is the velocity of a 500 kg elevator that has 4,000 J of energy as it goes from the 13th floor…

A: Given, the mass of elevator =500 kgElevator has energy =4000 Jwe have to calculate the velocity of…

Q: A wooden crate with m = 1kg slides on a horizontal surface towards a wall as shown in the figure.…

A: Write the equation for the acceleration for the block after collision. a=-μkg Here, The acceleration…

Q: A 4800-kg open railroad car coasts at a constant speed of 7.60m/s on a level track. Snow begins to…

A: The given values with suitable variables are listed below. Here, m1 denotes the car’s mass, u1…

Q: A block of mass m = 0.04 kg slides across a frictionless horizontal surface with an initial speed of…

A: As we known that when any particle moving  with velocity (v) it has kinetic energy which is given…

Q: A 2kg hockey puck on a frozen pond is given an initial speed of 20 m/s. If the puck always remains…

A: Data Given ,  Mass of the hockey puck ( m ) = 2 kg  Initial speed ( u ) = 20 m/s Displacement ( s )…

Q: Q (): Ifa 3 kg ball is thrown straight up into the air with initial speed of 25 m/s, the kinetic pne…

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Q: (A) (B) 5.00 m 3.20 m 2.00 m

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Q: a 1.75-kg block at rest on a ramp of height h.When the block is released, it slides without friction…

A: From conservation of energy, the required expression for the height is,

Q: Gayle runs at a speed of 4.15 m/s and dives on a sled, initially at rest on the top of a…

A: Conservation of energy is used to calculate their speed at the bottom of the hill.…

Q: A 8.00-kg block of ice is released from rest at the top of a 1.60-m long frictionless ramp, slides…

A: Given:mass of block, m = 8.0 kgLength of frictionless ramp, L = 1.6 mspeed of block at the bottom, v…

Q: 20 kg box has an initial velocity of 20 m/s to the right. A person applies a force of 200 N to the…

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Q: A 5.50 ✕ 105 kg subway train is brought to a stop from a speed of 0.500 m/s in 0.300 m by a large…

A: We are authorized to answer only one question at a time, since you have not mentioned which question…

Q: 60 kg | 10m 80kg A section of a roller coaster track assumed to be frictionless is shown with two…

A: a) Apply principle of conservation of mechanical energy, so the potential energy of the car gets…

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.