How much power must be provided in order to horizantally drag at constant speed a 50 kg table a distance of 20 m across a floor in 1 minute, given that the coefficient of kinetic friction between the table and the floor is 0.6? A rubber ball is dropped from a height of 1.0 m above the floor and bounces back to a height of 0.70m. What is the speed of the ball just before it hits the floor? What is the speed of the ball just before after it hits the floor?

Q: A dog with a mass of 57.0 kg slides down a wet slope with negligible friction. The dog starts from…

A: Given The mass of the dog is m = 57 kg. The initial speed of dog is u = 0. The final speed of the…

Q: A dockworker pushes an 80 kg crate with a downward force of 400 N, directed at an angle 30° to the…

A: Given information: Here, m is the crate’s mass, F is the applied force (push), µk is the kinetic…

Q: Several children are on a sled pulled by a four-wheeler across a level snow-covered field. The sled…

A:

Q: 29.A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25° below…

A:

Q: Several children are on a sled pulled by a four-wheeler across a level snow-covered field. The sled…

A:

Q: Four different 1 kg objects released from a point 5 m above the ground and later hit the ground.…

A: Given: 4 different objects with mass 1 kg and released from 5 m above the ground Object A is dropped…

Q: Several children are on a sled pulled by a four-wheeler across a level snow-covered field. The sled…

A: Distance traveled by the sled is

Q: Sheila has just arrived at the airport and is dragging her suitcase to the luggage check-in desk.…

A: Given : force, f = 190 N Angle,  θ = 35° Displacement, d = 45 m

Q: Sam, whose mass is 75 kg , straps on his skis and starts down a 64 m -high, 20 degrees frictionless…

A: The given values are, m=75 kgh=64 mθ=20°F=200 N

Q: 19. A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25° below…

A: The free-body diagram of the given problem is:

Q: A 3.50-kN piano is lifted by three workers at constant speed to an apartment 25.0 m above the street…

A:

Q: A 250 kg elevator rises from rest in the basement to the fourth floor, a distance of 35m. As it…

A:

Q: A girl on skateboard (total mass of 56.1 kg) is moving at 14.1 m/s at the bottom of a long ramp. The…

A: Mass of the girl M=56.1 kg Initial speed u=14 m/s Final speed v=0 Angle of inclination θ=19.490…

Q: A crate has reached a ramp that is inclined at an angle of 15 degrees with the horizontal. You push…

A: Required :: Work done, W

Q: A 270-N child is in a swing that is attached to a pair of ropes 1.90 m long. Find the gravitational…

A:

Q: Sam, whose mass is 67 kg , straps on his skis and starts down a 40 m -high, 20∘ frictionless slope.…

A: According to the work energy theorem, the net work done on Sam will be equal to his change in…

Q: block of mass m = 7.70 kg is released from rest from point  and slides on the frictionless track…

A: given  ha = 5.70 m  Mass of block ,M = 7.70 kg  Height of point B, hb = 3.20 m  Height at point C,…

Q: Sam, whose mass is 72 kg , straps on his skis and starts down a 64 m -high, 20° frictionless slope.…

A: Given Data:- Mass of Sam is m=72 kg. Height of the slope is h=64 m. Angle of inclination of the…

Q: A skier of mass 70.0 kg rides a ski lift to the top, which is 500 m higher than the base of the…

A: A skier of mass M = 70.0 kg rides a ski lift to the top, which is h = 500 m higher than the base of…

Q: Several children are on a sled pulled by a four-wheeler across a level snow-covered field. The sled…

A: Given:-  The speed of the sled is v = 9.35 m/s is constant  The tow rope [ parallel to the ground ]…

Q: A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting…

A: Mass of helicopter M= 780 kg Iniatial speed of helicopter u = 0 Final speed of helicopter v= 10.0…

Q: A 64.0 kg man, standing on a frictionless walkalator inclined at 0=33.0° below the horizontal, holds…

A:

Q: A sledge loaded with bricks has a total mass of 17.7 kg and is pulled at constant speed by a rope…

A: The mass =17.7kg  The distance d=19.7m  The surface =0.500

Q: As shown in the figure below, three blocks with masses m, - 3.0 kg, m, = 12 kg, and m, = 18 kg,…

A: Let 3 m below the table be the point of reference for gravitational energy -  Energy conservation…

Q: The (non-conservative) foree propelling a 1.10 x 10°-kg car up a mountain road does 7.50 x 10 J of…

A: Given: mass of car m =1.10*103 kgwork done by force W = 7.50*106 Jheight reached h = 2.20*102 m

Q: Another engine reaches its top speed from rest in 7.5 s. It is able to perform 250,000 J of work in…

A: Power = work ÷ time

Q: A physics student shoves a 0.50-kg block from the bottom of a frictionless 30.0° inclined plane. The…

A: The energy that objects store and is used to make a movement is known as potential energy. It is…

Q: A 1.78 kg textbook is thrown horizontally at 5.20 m/s from a window. The window is 3.60 m above the…

A: Work done by gravity on the text book is:

Q: A child on a sled is initially at rest on an icy horizontal surface. The sled is pushed until it…

A:

Q: 4. A 75.0-kg man is riding an escalator in a shopping mall. The escalator moves the man at a…

A: Given:Mass,m=75 kgHeight,h=4.60 mNow,A) The work done on  the gravitational force.Work Done by…

Q: e is cutting the grass using a human-powered lawn mower, which has a mass of 20 kg. He pushes the…

A: F=Force applied=45 Nθ=Angle at which the force is applied=41°s=Displacement of the mower=9.1 m

Q: Several children are on a sled pulled by a four-wheeler across a level snow-covered field. The sled…

A:

Q: 30. Juggles and Bangles are clowns. Juggles stands on one end of a teeter- totter at rest on the…

A: The gravitational potential energy PE of an object,…

Q: sled with mass 8.50 kg moves in a straight line on a frictionless, horizontal surface. At one point…

A: Force brings about motion and changes in it. This force produce acceleration and hence the changes…

Q: John is moving the drawer from one place to another, instead of pushing he used a rope to pull it…

A:

Q: A woman pushes a lawnmower forward with a force of 125 N for a distance of 15 m as shown. The force…

A: Given Two forces Forward Force F= 125 N frictional force f = 50 N Distance S = 15 m We will use…

Q: You apply a force of 1.5 N at an angle of 34° from the vertical on a block that is sitting on a…

A: Work is defined as  W=F→·d→=Fdcosθ Here F→ is force, d→ is displacement and θ is the angle between…

Q: Mike is cutting the grass using a human-powered lawn mower. He pushes the mower with a force of 45 N…

A:

Q: You are rearranging your furniture and wish to move a 40.0 kg futon 2.50 m across the room. A heavy…

A: Given values:- Mass of futon,(m)=40 kg ----(1) Distance moved along a straight line,(d)=2.5 m…

Q: A father is pushing a stroller on a small road in a park.  He is pushing with a force of 28 N…

A: Given applied force(F) = 28N Displacement(S) = 48m

Q: A child pulls a sled upon snow covered hill. The child does 450 J of work on the sled. If child…

A:

Q: A factory worker pushes a 29.2 kg crate a distance of 4.7 mm along a level floor at constant…

A:

Q: Tom used 100N of force to drag a 10kgs of rocks up a 15 degree hill. There is an initial velocity of…

A: The free-body diagram of the rock on the inclined hill is shown below. Here, N denotes the normal…

Q: Wendy (mass = 45.0 kg) climbs a rough incline (coefficient of friction = 0.26) that is 2.75 m long…

A: Draw the free-body diagram of Wendy.

Q: Working Like a Horse. Your job is to lift 30 kg crates a vertical distance of 0.90 m from the ground…

A: The average power output is the general value of power that is given by any system. Mathematically…

Q: A 3.50 - kN piano is lifted by three workers at constant speedto an apartment 25.0 m above the…

A: Given data:Weight of the piano, F = 3.50 k.N = 3.50 x 103 kg.Height of the apartment, H = 25.0…