As shown in the figure below, a skateboarder starts at point A on the ramp and rises to point B, a maximum height of h = 2.71 mabove the top of the ramp.BIf the amount of work done against friction is insignificant, determine his initial speed (in m/s) at point A.m/sAdditional MaterialsO Reading

Name: As shown in the figure below, a skateboarder starts at point A on the
Uploaded: 2024-03-20T06:57:25.000Z
Channel: Bartleby
Description: As shown in the figure below, a skateboarder starts at point A on the ramp and rises to point B, a maximum height of h = 2.71 mabove the top of the ramp.BIf the amount of work done against friction is insignificant, determine his initial speed (in m

Given a skateboarder start from point A it attained maximum height = h = 2.71 m above the top of the…

Science

Physics

As shown in the figure below, a skateboarder starts at point A on the ramp and rises to point B, a maximum height of h = 2.71 m above the top of the ramp. If the amount of work done against friction is insignificant, determine his initial speed (in m/s) at point A. m/s

As shown in the figure below, a skateboarder starts at point A on the ramp and rises to point B, a maximum height of h = 2.71 m above the top of the ramp. If the amount of work done against friction is insignificant, determine his initial speed (in m/s) at point A. m/s

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter8: Conservation Of Energy

Section: Chapter Questions

Problem 15PQ

See similar textbooks

Similar questions

A girl pulls her 15-kg wagon along a flat sidewalk by applying a 10-N force at 37 to the horizontal. Assume that friction is negligible and that the wagon starts from rest. (a) How much work does the girl do on the wagon in the first 2.0 s. (b) How much instantaneous power does she exert at = 2.0 s?
At hokey puck of mass 0.17 kg is shot across a rough floor with the roughness different at different places, which can be described by a position-dependent coefficient of kinetic friction. For a puck moving along the x-axis, the coefficient of kinetic friction is the following function of x, where x is in m: (x)=0.1+0.05x . Find the work done by the kinetic frictional forte on the hockey puck when it h moved (a) from x=0 to x=2 m, and (b) from x=2 m to x=4 m.
A shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a 35.0 N frictional force. He pushes in a direction 25.Oc below the horizontal. (a) What is the work done on the cart by friction? (b) What is the work done on the cart by the gravitational force? (c) What is the work done on the cart by the shopper? (d) Find the force the shopper exerts, using energy considerations. (e) What is the total work done on the cart?
Find the work done by the same force in Example 7.4, between the same points, A=(0,0) and B=(2m,2m) , over a circular arc of radius 2 m, centered at (2m,0) . Evaluate the path integral using Cartesian coordinates. (Hint: You will probably need to consult a table of integrals.)
A massless spring with force constant k=200N/m hangs from the ceiling. A 2.0-kg block is attached to the free end of the spring and released. If the block falls 17 cm before starting back upwards, how much work is done by friction during its descent?
A toy cart is pulled a distance of 6.0 m in a straight line across the floor. The force pulling the cart has a magnitude of 20 N and is directed at 37 above the horizontal. What is the work done by this force?
Most electrical appliances are rated in watts. Does this rating depend on how long the appliance is on? (When off, It is a zero-wan device.) Explain in terms of the definition of power.
How much work does the force do on a particle as it moves from to
Suppose a car travels 108 km at a speed of 30.0 m/s, and uses 2.0 gal of gasoline. Only 30 of the gasoline goes into useful work by the force that keeps the car moving at constant speed despite friction. (The energy content of gasoline is about 140 Mi/gal.) (a) What is the magnitude of the force exerted to keep the car moving at constant speed? (b) If the required force is directly proportional to speed, how many gallons will be used to drive 108 km at a speed of 28.0 m/s?
A 2.0-kg block starts with a speed of 10 m/s at the bottom of a plane inclined at 37 to the horizontal. The coefficient of sliding friction between the block and plane is k=0.30 . (a) Use the work-energy principle to determine how far the block slides along the plane before momentarily coming to rest. (b) After stopping, the block slides back down the plane. What is its speed when It reaches the bottom? (Hint: For the round trip, only the force of friction does work on the block.)
A crate on rollers is being pushed without frictional loss of energy across the floor of a freight car (see the following figure). The car is moving to the right with a constant speed v0 . If the crate starts at rest relative to the freight car, then from the work-energy theorem, Fd=mv2/2, where d, the distance the crate moves, and v , the speed of the crate, are both measured relative to the freight car. (a) To an observer at rest beside the tracks, what distance d is the crate pushed when it moves the distance d in the car? (b) What are the crate’s initial and final speeds v0 and v as measured by the observer beside the tracks? (c) Show that Fd=m(v)2/2m(v0)2/2 and, consequently, that work is equal to the change in kinetic energy in both reference systems.
“ E=K+Uconstant is a special case of the work energy theorem.” Discuss this statement.