Using energy considerations, calculate the average force (in N) a 67.0 kg sprinter exerts backward on the track to accelerate from 2.00 to 7.00 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.

Using energy considerations, calculate the average force (in N) a 67.0 kg sprinter exerts backward on the track to accelerate from 2.00 to 7.00 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.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 76P: Calculate the power output needed for a 950-kg car to climb a 2.00 slope at a constant 30.0 m/s...

See similar textbooks

Related questions

Q: Starting a race, a 68.2-kg sprinter runs the first 7.04 m in 1.60 s, starting from rest and…

A: Given: The mass (m) of the sprinter is 68.2 Kg. The distance (S) covered by the sprinter is 7.04 m.…

Q: What is the net work of a system if there is an applied force pushing it at a value of 7887.04N at a…

A: Given, Pushing force , F = 7887.04 N Distance, s = 26.62 m Coefficient of kinetic friction, μk =…

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…

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

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…

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: At what speed does a 1000 kg compact car have the same kinetic energy as a 2.00×10* kg truck going…

A: Given : mass of compact car, mc = 1000 kg mass of truck, mt = 2.0 × 104 kg…

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

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

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 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: 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…

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

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: A boxed 10.0 kg computer monitor is dragged by friction 5.50 m upward along a conveyor belt inclined…

A: Given Data: The weight of the computer is, m= 10.0 kg. The displacement is, x= 5.5 m. The…

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: 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: How much work is done when you push a crate horizontally with 120 NN across a 11-mm factory floor?…

A: The work done is given by W F x d where, F is the force in the direction of displacement and d…

Q: On a frozen pond, a 8.54-kg sled is given a kick that imparts to it an initial speed of…

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…

Q: What average mechanical power (in W) must a 72.0 kg mountain climber generate to climb to the summit…

A: Given : Mass of the climber, m = 72 kg Height of the hill, h = 345 m time taken, t =…

Q: A car generating a power of (93670.06)watts is traveling on a road with a coefficient of kinetic…

Q: A 700 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m (about a quarter of a…

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: What is the net work of a system if there is an applied force pushing it at a value of 5266.62 at a…

A: Given data: Net work of a system is, F=5266.62 N. Distance covered is, s=60.8 m. Coefficient of…

Q: Using energy considerations, calculate the average force (in N) a 62.0 kg sprinter exerts backward…

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 64.0 kg sprinter exerts backward…

A: When any force acting on the body changes the motion of the body then work is done on the body by…

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

Q: A toad with mass of 190 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

A: given , mass of the toad , m = 190 g =0.190 Kg Angle with respect to the horizontal , θ = 37∘…

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…

Question

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

An electric scooter has a battery capable of supplying 120 Wh of energy. If friction forces and other losses account for 60.0% of the energy usage, what altitude change can a rider achieve when driving in hilly ter-rain if the rider and scooter have a combined weight of 890 N?
Calculate the power output needed for a 950-kg car to climb a 2.00 slope at a constant 30.0 m/s while encountering wind resistance and friction totaling 600 N.
At the start of a basketball game, a referee tosses a basketball straight into the air by giving it some initial speed. After being given that speed, the ball reaches a maximum height of 4.25 m above where it started. Using conservation of energy, find a. the balls initial speed and b. the height of the ball when it has a speed of 2.5 m/s.
Give an example of a situation in which there is a force and a displacement, but the force does no work. Explain why it does no work.
A baseball of mass 0.25 kg is hit at home plate with a speed of 40 m/s. When it lands in a seat in the left-field bleachers a horizontal distance 120 m from home plate, it is moving at 30 m/s. If the ball lands 20 m above the spot where it was hit, how much work is done on it by air resistance?
The surface of the preceding problem is modified so that the coefficient of kinetic friction is decreased. The same horizontal force is applied to the crate, and after being pushed 8.0 m, its speed is 5.0 m/s. How much work is now done by the force of friction? Assume that the crate starts at rest.
Check Your Understanding Estimate the power expended by a weightlifter raising a 150-kg barbell 2 m in 3 s.
A 5.0-kg block is pushed 3.0 m up a vertical wall with constant speed by a constant force of magnitude F applied at an angle of = 30 with the horizontal, as shown in Figure P5.76. If the coefficient of kinetic friction between block and wall is 0.30, determine the work done by (a) , (b) the force of gravity, and (c) the normal force between block and wall, (d) By how much does the gravitational potential energy increase during the blocks motion? Figure P5.76
A worker pushes a wheelbarrow with a horizontal force of 50 N on level ground over a distance of 5.0 m. 11 a friction force of 43 N acts on the wheelbarrow in a direction opposite that of the worker, what work is done on the wheelbarrow by the worker? (a) 250 J (b) 215 (c) 35 J (d) 10 J (e) None of those answers is correct.
A 5.00-kg block is set into motion up an inclined plane with an initial speed of i = 8.00 m/s (Fig. P7.21). The block comes to rest after traveling d = 3.00 m along the plane, which is inclined at an angle of = 30.0 to the horizontal. For this motion, determine (a) the change in the blocks kinetic energy, (b) the change in the potential energy of the block-Earth system, and (c) the friction force exerted on the block (assumed to be constant), (d) What is the coefficient of kinetic friction? Figure P7.21