1. When a coconut falls from a tree, work Wis done on it as it falls to the beach. This work isdescribed by the equation1W = Fd = m -mu.Identify the quantities F, d, m, v1, and v2 in this event.a. Fis the force of gravity, which is equal to the weight of the coconut, d is the distance the nutfalls, m is the mass of the earth, v, is the initial velocity, and v2 is the velocity with which ithits the beach.b. Fis the force of gravity, which is equal to the weight of the coconut, d is the distance the nutfalls, m is the mass of the coconut, vi is the initial velocity, and v2 is the velocity with which ithits the beach.C. Fis the force of gravity, which is equal to the weight of the coconut, d is the distance the nutfalls, m is the mass of the earth, vi is the velocity with whicinitial velocity.d. Fis the force of gravity, which is equal to the weight of the coconut, d is the distance the nutfalls, m is the mass of the coconut, v, is the velocity with which it hits the beach, and v2 is theinitial velocity.it hits the beach, and v2 is the

Name: 1. When a coconut falls from a tree, work Wis done on it as it falls
Uploaded: 2024-03-20T06:57:25.000Z
Channel: Bartleby
Description: 1. When a coconut falls from a tree, work Wis done on it as it falls to the beach. This work isdescribed by the equation1W = Fd = m -mu.Identify the quantities F, d, m, v1, and v2 in this event.a. Fis the force of gravity, which is equal to the weig

According to Work energy theorem Work done = change in energy

Science

Physics

1. When a coconut falls from a tree, work W is done on it as it falls to the beach. This work is described by the equation 1 1 W = Fd =mu -mu . 2 2 entify the quantities F, d, m, Vi, and v2 in this event.

1. When a coconut falls from a tree, work W is done on it as it falls to the beach. This work is described by the equation 1 1 W = Fd =mu -mu . 2 2 entify the quantities F, d, m, Vi, and v2 in this event.

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter3: Energy And Conservation Laws

Section: Chapter Questions

Problem 8C

See similar textbooks

Similar questions

A running 62-kg cheetah has a top speed of 32 m/s. (a) What is the cheetahs maximum kinetic energy? (b) Kind the cheetahs speed when its kinetic energy is one half of the value found in part (a).
A child of mass m starts from rest and slides without friction from a height h along a curved waterslide (Fig. P5.46). She is launched from a height h/5 into the pool. (a) Is mechanical energy conserved? Why? (b) Give the gravitational potential energy associated with the child and her kinetic energy in terms of mgh at the following positions: the top of the waterslide, the launching point, and the point where she lands in the pool. (c) Determine her initial speed V0 at the launch point in terms of g and h. (d) Determine her maximum airborne height ymax in terms of h, g, and the horizontal speed at that height, v0x. (e) Use the x-component of the answer to part (c) to eliminate from the answer to part (d), giving the height ymax in terms of g, h, and the launch angle . (f) Would your answers be the same if the waterslide were not frictionless? Explain. Figure P5.46
A 60.0-kg athlete leaps straight up into the air from a trampoline with an initial speed of 9.0 m/s. The goal of this problem is to find the maximum height she attains and her speed at half maximum height. (a) What are the interacting objects and how do they interact? (b) Select the height at which the athletes speed is 9.0 m/s as y = 0. What is her kinetic energy at this point? What is the gravitational potential energy associated with the athlete? (c) What is her kinetic energy at maximum height? What is the gravitational potential energy associated with the athlete? (d) Write a general equation for energy conservation in this case and solve for the maximum height. Substitute and obtain a numerical answer. (e) Write the general equation for energy conservation and solve for the velocity at half the maximum height. Substitute and obtain a numerical answer.
A 3.00-kg object has a velocity (6.00i1.00j)m/s. (a) What is its kinetic energy at this moment? (b) What is the net work done on the object if its velocity changes to (8.00i+4.00j)m/s. (Note: From the definition of the dot product, v2=vv.)
(a) How much gravitational potential energy (relative to the ground on which it is built) is stored in the Great Pyramid of Cheops, given that its mass is about 7109 kg and its center of mass is 36.5 m above the surrounding ground? (b) How does this energy compare with the daily food intake of a person?
(a) Calculate the force needed to bring a 950-kg car to rest from a speed of 90.0 km/h in a distance of 120 m (a fairly typical distance for a non-panic stop). (b) Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a).
(a) A child slides down a water slide at an amusement park from an initial height h. The slide can be considered frictionless because of the water flowing down it. Can the equation for conservation of mechanical energy be used on the child? (b) Is the mass of the child a factor in determining his speed at the bottom of the slide? (c) The child drops straight down rather than following the curved ramp of the slide. In which case will he be traveling faster at ground level? (d) If friction is present, how would the conservation-of-energy equation be modified? (e) Find the maximum speed of the child when the slide is frictionless if the initial height of the slide is 12.0 m.
One person drops a ball from the top of a building while another person at the bottom observes its motion. Will these two people agree (a) on the value of the gravitational potential energy of the ball-Earth system? (b) On the change in potential energy? (c) On the kinetic energy of the ball at some point in its motion?
(a) How long will it take an 850-kg car with a useful power output of 40.0 hp (1hp=746W) to reach a speed of 15.0 m/s, neglecting friction? (b) How long will this acceleration take if the car also climbs a 3.00-m-high hill in the process?
In most situations we have encountered in this chapter, frictional forces tend to reduce the kinetic energy of an object. However, frictional forces can sometimes increase an objects kinetic energy. Describe a few situations in which friction causes an increase in kinetic energy.
Suppose a 350-g kookaburra (a large kingfisher bird) picks up a 75-g snake and raises it 2.5 m from the ground to a branch. (a) How much work did the bird do on the snake? (b) How much work did it do to raise its own center of mass to the branch?
A child of mass m starts from rest and slides without friction from a height h along a curved waterslide (Fig. P5.46). She is launched from a height h/5 into the pool. (a) Is mechanical energy conserved? Why? (b) Give the gravitational potential energy associated with the child and her kinetic energy in terms of mgh at the following positions: the top of the waterslide, the launching point, and the point where she lands in the pool. (c) Determine her initial speed V0 at the launch point in terms of g and h. (d) Determine her maximum airborne height ymax in terms of h, g, and the horizontal speed at that height, v0x. (e) Use the x-component of the answer to part (c) to eliminate from the answer to part (d), giving the height ymax in terms of g, h, and the launch angle . (f) Would your answers be the same if the waterslide were not frictionless? Explain. Figure P5.46