A book is pushed across a horizontal rough table at a steady speed for a certain distance. When apply the following energy principle to this question, assuming the system is book+earth+table, which of the energy term is positive? Select all apply. ΔK + ΔUg + ΔUsp + ΔEth + ΔEch = Wexternal     ΔK     ΔUg     ΔUsp     ΔEth     ΔEch     Wexternal     none of the above

Q: You throw a 20-NN rock vertically into the air from ground level. You observe that when it is a…

A: Given:                 weight of rock                               W= 20N             height to…

Q: 900 N box is pushed up an inclined plane that is 6.0 m long. It requires 3900 J of work to get the…

A: kinetic energy at bottom= kinetic energy at top=0 as as bottom and top the speed is zero. potential…

Q: 6. A standard baseball has around 146 g. If a ball comes off a bat with 30 W of kinetic energy, how…

A: Note: The unit of kinetic energy mentioned in the question is incorrect, considering the unit of…

Q: A constant external force P = 310 N is applied at an angle 30° below the horizontal to a 20 kg box,…

A:

Q: One 50.0 kg cart is lifted straight up 9.0 m above the ground. An identical cart is pulled up a…

A: Given mass of cart = 50.0 kg this cart is lifted straight up by 9.0 m second identical cart is…

Q: A loaded grocery cart is rolling across a parking lot in a strong wind. You apply a constant force…

A:

Q: A firefighter slides down a pole with constant speed. What can you say about the energy? a. U to…

A:

Q: A 2-kg brick is thrown downward from a height ?1 = 15 m to ?2 = 10 m. The initial kinetic energy of…

A:

Q: You throw an 18.0 N rock into the air from ground level and observe that, when it is 11.0 m high, it…

A: Given  weight of the rock=mg=18 N m=18/9.8=1.84 kg speed at height (h=11 m) is 18 m/s

Q: A 0.6 kg box moves up a ramp with some initial speed. It reaches a vertical height of 3.5 m before…

A: Solution: Given: m = mass of box = 0.6 kg g = gravitational acceleration = 10 m/s2 h = height of…

Q: A 2.56 kg cart moving along a horizontal track in the positive x direction has a changing force…

A:

Q: A ski area claims that its lifts can move 48,000 people per hour. a.)If the average lift carries…

A:

Q: To stretch a certain spring by 2.80 cm from its equilibrium position requires 6.50 J of work. Part…

A:

Q: An object of mass m=1.2 kg is sliding from top to bottom of an inclined plane of inclination angle 0…

A:

Q: A 22.0 kg child plays on a swing having support Express your answer in meters per second. ropes that…

A:

Q: 350 kg A man pulls a rope attached to a crate. If the frictional force between the crate & the floor…

A:

Q: 4) A roller coaster of mass 80.0 kg is moving with a speed of 20.0 m/s at position A as shown in the…

A:

Q: A worker pushes a wood crate of mass 23.4 kgacross a concrete floor witha constant horizontal force…

A:

Q: A box is being pushed to the right with 112N of force. The box travels a total of 1.5m to the right.…

A:

Q: Roy pulls a box of mass 19.7 kilograms across a horizontal floor by exerting a force of 96.4 newtons…

A: Given Mass of box = m = 19.7 kg Force apply by the Roy = F = 96.4 N angle above the horizontal in…

Q: A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at…

A:

Q: Asled is being pulled along a horizontal surface by a horizontal force Fof magnitude 600 N. Starting…

A:

Q: A car runs out of gas at the bottom of a hill. It rolls 70 m before coming to a complete stop. If…

A: Given: The mass of the car is 800 kg. The angle of inclination is 10°. The coefficient of friction…

Q: Find the work done by (4 N) frictional force, in removing an object for (15 m) along horizontal…

A: Given data, Friction Force (F)= 4 N Horizontal Distance (d)= 15 m

Q: 3. a 0.35-kg fruit is falling from a tree with a speed of 5.0 m/s after t = 1.0 s. At t = 2.0 s, the…

A:

Q: The power output (in W) needed from a motor to lift a mass of 1.5 x 104 Kg, 25 m in 6.0 s at…

A: The mass is The displacement of the mass is The lifting time is

Q: You lift a book at a constant speed. Which statement is true about the work W done by your hand and…

A: Work done in lifting a book

Q: A 60 kg woman holds a 9kg package as she stands within an elevator that briefly accelerates upward…

A:

Q: 2876 kg elephant from Asia (Elephas maximus) pushes against a coconut tree (Cocos nucifera), which…

A: Here elephant is the agent which exerts external force.  There is no conservative as well as non…

Q: Sheryl is driving along the highway in an 894 kg car. She initially drives at a velocity of 50 m/s.…

A: Given:-  The mass of the car is m = 894 kg  The initial velocity of the car is vi= 50 m/s  The…

Q: 2. A rock is shot straight up into the air with a slingshot that had been stretched 0.30 m. Assume…

A:

Q: An object of mass m=1.6 kg is sliding from top to bottom of an inclined plane of inclination angle 0…

A: The free body diagram is shown as below: Coefficient of friction = μ=0.4 Mass of the block = m =…

Q: A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at…

A: Given(s): Mass of the box, m=4.0 kg Height raised, h=4 m Moving at a constant speed of 5.0 m/s.…

Q: A puck, mass 0.20 kg, slides on a horizontal ice rink with a speed of (1.47x10^0) m/s. A hockey…

A: This can be solved using the work-energy theorem. As per the work-energy theorem net work done on an…