Using energy considerations, calculate the average force (in N) a 64.0 kg sprinter exerts backward on the track to accelerate from 2.00 to 5.50 m/s in a distance of 25.0 m, if he encounters a headwind that exerts an average force of 30.0 N against him.

Q: Moving at an initial speed of vi=2.00m/s, Jimmy slides from a height of h=5.00m down a straight…

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Q: The human small intestine moves food alongits 6.9-m length by means of peristalsis, a contraction…

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Q: A 2.5 kg mass is initially at rest on a horizontal surface. An applied force acts in the +x…

A: Given, Mass 'm' = 2.5 kg displacement 'd' = 1.5 m  final speed 'v' = 4 m /s at distance of 150 m…

Q: Using energy considerations, calculate the average force (in N) a 67.0 kg sprinter exerts backward…

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Q: Spiderman, whose mass is 80.0 kg, is dangling on the free end on the 12.0-m long rope, the other end…

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Q: A 5.0-kg block is pushed 3.0 m up a vertical wall with con- stant speed by a constant force of…

A: Figure shows the force acting on the block.

Q: Is it possible to increase the kinetic energy without the application of external force?

A: yes the kinetic energy will increase without applying any external force. for example, when we kept…

Q: Your friend (mass 65.0 kg) is standing on the ice in the middle of a frozen pond. There is very…

A: given mass=65.0 kg initial velocity,u=0 final velocity,v=6.00m/s time t=3.00sec Acceleration can be…

Q: i. A 5.0-kg block is pushed 3.0 m up a vertical wall with con- stant speed by a constant force of…

A: Given  Mass of block = 5.0 kg  Angle =30°  coefficient of friction=u= 0.3    Displacement =d= 3.0m…

Q: The resilin in the body of a flea has a forceconstant of about 24 N>m, and when the flea cocks…

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Q: A fully loaded, slow-moving freight elevator has a cab with a total mass of 1600 kg, which is…

A: Given:-         Total mass  M=1600 kg        Distance to cover  d=39 m        Time taken  t=2.2…

Q: A horizontal force of 2000N is applied to a vehicle of mass 400 kg which is initially at rest on a…

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Q: A bus of mass 1000 kg with an initial velocity of 40 m/s starts up a hill and coasts upward with no…

A: Given : Initial Velocity (  u ) = 40 m/s Mass ( m ) = 1000 kg The height achieved when it stops ( h…

Q: A fully loaded, slow-moving freight elevator has a cab with a total mass of 1200 kg, which is…

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Q: A boxed 10.0-kg computer monitor is dragged by friction 5.50 m up along the moving surface of a…

A: Given: The mass of the computer monitor is 10 kg. The displacement of the object along the plane is…

Q: The power delivered by a constant force is given by P=FO-vO, The power exerted by gravity as it…

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Q: A boxed 10.0-kg computer monitor is dragged by friction 5.50 m up along the moving surface of a…

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Q: A 10N horizontal force is exerted on a 100kg object that slides on a frictionless, horizontal…

A: First method: According to the Newton’s second law, the acceleration of the object is, F=maa=Fm=10…

Q: Spiderman, whose mass is 74.0 kg, is dangling on the free end of a 12.2-m-long rope, the other end…

A: The work done by the gravitational force on the spider man in this maneuver is Wg=mg∆h=mgl-lcosθ…

Q: Using energy considerations, calculate the distance the 65.0-kg baseball player slides,given that…

A: The initial kinetic energy of the system is

Q: An object of mass 7.39 kg is moving with an initial kinetic energy 394 Joules. If the object…

A: Given data: Mass of the object, m=7.39 kg Initial kinetics energy of the object, K.Ei=394 J…

Q: A mass of 47 kg is moving horizontally as a force of 190 N, directed at 25° below the horizontal, is…

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Q: It takes a force of 1450 N to keep a 1300-kg car moving with constant speed up a slope of5.25°. If…

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Q: A 0.90-kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of…

A: From the expression for work-energy theorem W=Fdcosθ Here, θ is the angle between the direction of…

Q: Matthew pulls his little sister Sarah in a sled on an icy surface (assume no friction), with a force…

A: Given data: Force (F) = 60.0 N Angle (θ) = 37.0° above the horizontal Distance (d) = 12.0 m…

Q: A Boeing 787-9 jetliner has a mass of 245,000 kg in cluding passengers . Its two engines produce a…

A: m = 245000 kg F = 642000 N v = 623km/h = 623*5/18= 173.06 m/s

Q: A 1700 kg car starts up a 130 m long hill at a speed of 20.0 m/s. If the propulsive force (up the…

A: Work done by gravity  Wg = -mgh = -1700×9.81×48.1 = -802163.7 J Work done by propulsive force  WP =…

Q: A 0.90-kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of…

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Q: A 0.80-kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of…

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Q: In what direction relative to the direction of travel can a force act on a car (traveling on level…

A: The kinetic energy of any object with a mass m moving with a velocity v is given by KE=12mv2 Any net…

Q: Initially at rest, a block with a mass of 6 kg above a frictionless surface is pulled to the right…

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Q: Calculate the average power necessary for a 55.8 kg person to run up a 5.0 m high, sloped hill, in…

A: The expression for the average power is P=Wt Here,P  is the average power,  iWs the work done by…

Q: A baseball of mass 350 g is hit at home plate with a speed of 50 m/s. When it lands in a seat in the…

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Q: An applied force of 14.4 N acts on a 2.50 kg mass that is initially at rest. Over a distance of 2.35…

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Q: Describe a situation in which a force is exerted for a long time but does no work. Explain.

A: We consider a situation when an object lifted at height h is displaced a distance x.

Q: Suppose a 975-kg car can produce a useful power output of 42.5 hp (1 hp = 746 W). How long, in…

A: Data Given ,  Mass of the car ( m ) = 975 kg Power of the car ( P ) = 42.5 hp   = ( 42.5 × 746 ) W =…

Q: A fully loaded, slow-moving freight elevator has a cab with a total mass of 1200 kg, which is…

A:

Q: How much work must you do to push a 11.0 kg block of steel across a steel table (μk=0.6)at a steady…

A: a) The required work done is,

Q: Little Hudson holds the 10-kgkg barbell 0.3 mm above the floor. What is the PE of the barbell…

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Q: Using energy considerations, calculate the average force (in N) a 64.0 kg sprinter exerts backward…

A: The work-energy theorem states that the work done on a system by the external as well as the…

Q: Describe the energy transformations that take place when askier starts skiing down a hill, but after…

A: When the skier begins from elevated position, it posses large quantity of potential energy. If he…

Q: An 80-kg physics professor whose part of his daily exercise is walking through the stairs runs up…

A: Given data: Mass (m) = 80 kg Time (t) = 15 s Upward displacement (h) = 25 m Required: Power (P)

Q: Using energy considerations, calculate the average force (in N) a 63.0 kg sprinter exerts backward…

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Q: Ignoring friction, use the ideas of energy conservation to find the distance the cart will travel…

A: Given: mass of the object, m = 500 g = 0.5 kg initial speed of the object, u = 3.676 m/s angle of…