Bank robbers have pushed a 1000 kg safe to a second-story floorto- ceiling window. They plan to break the window, then lower the safe 3.0 m to their truck. Not being too clever, they stack up 500 kg of furniture, tie a rope between the safe and the furniture, and place the rope over a pulley. Then they push the safe out the window. What is the safe’s speed when it hits the truck? The coefficient of kinetic friction between the furniture and the floor is 0.50.

Q: Sam, whose mass is 80 kg , takes off across level snow on his jet-powered skis. The skis have a…

A: Given m=80kg, T=160N, μ=0.1, t=15s

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…

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Q: rope, attached to a weight, goes up through a pulley at the ceiling and back down to a worker. The…

A: Answer the following question

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

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Q: A bowling ball m=2.3kg is dropped from a height h. It falls a distance, d, before encountering a…

A: Given:-  The mass of the ball is m = 2.3 kg The height it dropped from is h and it falls a distance…

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: Novice piano movers have pushed a 1000 kg piano to a second-story window.  They plan to open the…

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

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Q: You push a file cabinet up a frictionless ramp tilted at 10°with horizontal. The file cabinet has a…

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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…

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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…

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

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Q: A 250g PASCar drags a sliding tray of 50g on the track. The kinetic friction coefficient between the…

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Q: Keep the track tilted at 14° with the horizontal. Put the friction block on the track surface at the…

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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…

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

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Q: Gayle runs at a speed of 3.65 m/s and dives on a sled, initially at rest on the top of a…

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

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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 4.73kg block is pulled across a floor by a 25.01 N force. The coefficients of static and kinetic…

A: Given Data: Mass of the block (m) = 4.73 kg.Force on the block (F) = 25.01 N.Coefficient of static…

Q: A dart of a mass of 20 g hits a target while traveling horizontally with a velocity of 5 m/s. The…

A: The mass of the dart ,m=20 g=20×10-3 kg The initial velocity of the dart u=5 m/s The distance…

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: Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. The scale reads 830 N for the…

A: Apply newton’s second law of motion along the motion of the lift, and substitute 95kg, for m,…

Q: How fast will the wagon accelerate

A: Here we use Newtonian equation of motion.

Q: A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.6 m/s.…

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

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Q: A skier starts going down a rocky hill that is inclined 30 degrees from the horizontal. It is 2 km…

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Q: In the winter sport of curling, two teams alternate sliding 20 kg stones on an icy surface in an…

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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…

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

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Q: A glider of mass 0.275kg is placed at rest on an air track that has an angle of inclination of 10°.…

A:

Q: A 0.19 kg hockey puck slides across an icy surface and experiences a small friction force of 0.09 N.…

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

Q: Sam, whose mass is 80 kg, takes off across level snow on his jet-powered skis. The skis have a…

A: Given: m=80 kg FT = 160 N t1 = 15 sec μ=0.1

Q: A girl on a skateboard (total mass of 40 kg) is moving at a speed of 10 m/s at the bottom of a long…

A: We have to determine the net frictional force on the girl We know the combined mass of the…

Q: Sam, whose mass is 80 kg , takes off across level snow on his jet-powered skis. The skis have a…

A: Top speed of Sam is   V = 15.285 m/s2  Distance covered by Sam before stop is.  d = 233.72 m