3) A 55-kg skateboarded launches himself from a ledge 3 m high down a semi-circular ramp, friction does -265 J of work on him. (a) What would be his speed at the bottom of the ramp? (b) Would he be able to reach the top of the ramp in the other end? h=3m

3) A 55-kg skateboarded launches himself from a ledge 3 m high down a semi-circular ramp, friction does -265 J of work on him. (a) What would be his speed at the bottom of the ramp? (b) Would he be able to reach the top of the ramp in the other end? h=3m

Name: 3) A 55-kg skateboarded launches himself from a ledge 3 m high down a
Uploaded: 2024-03-20T06:57:25.000Z
Channel: Bartleby
Description: 3) A 55-kg skateboarded launches himself from a ledge 3 m high down asemi-circular ramp, friction does -265 J of work on him. (a) What would behis speed at the bottom of the ramp? (b) Would he be able to reach the topof the ramp in the other end?h=3

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

2) A 6 slug mountaineer is reaching the top of Mt. Fuji that is 12,336 ft high. The mountain makes a slope of % from sea level to the peak. How much work does gravity do on the mountaineer in ft.lb.?
Anna, whose mass is 60?? and starting from rest, runs up the stairs which are inclined at ?=30° On reaching the top, which is higher than the ground by 3? her speed is 2.0?/? Considering the stairs as a straight ramp, determine: a) the total work is done on Anna, b) the work done by Anna.
Estimate the work (in Joule) you do not mow a lawn 20m by 20m with a 60-cm wider mover. Assume you push with a force about 25N
7. Steve pushes a second stalled car with a steady force The F = 160Ni-40N displacement of the car is s= 14mi + 11mj How much work does Steve do in this case?
A crane lifts a 650 kg beam vertically upward 10.1 m and then swings it westward 18 m. How much work does the crane do? Neglect any friction and assume the crane moves with constant speed
&6
(14 The driver of a 1900 kg car (including passengers) traveling at 24.0 m/s slams on the brakes, locking the wheels on the dry pavement. The friction force between tire rubber and dry concrete is 14,000 N. a. Use the work-energy principle to calculate how far the car will travel before stopping. Express your answer with the appropriate units. b. How far would the car travel if it were going twice as fast? Express your answer with the appropriate units.
Question 12 Mary, whose mass is 55.0 kg, starts from rest at the top of a water slide that is a height of 4.00 m above the water level. As she slides down, the force of friction does - 468 J of work on her. How fast is she moving when she reaches the water? (You will need to know her KE at the bottom)
Problem 2: Suppose a car approaches a hill and has an initial speed of 108 km/h at the bottom of the hill. The driver takes her foot off of the gas pedal and allows the car to coast up the hill. a) If the car has the initial speed stated at a height of h = 0, how high, in meters, can the car coast up a hill if work done by friction is negligible? b) If, in actuality, a 770-kg car with an initial speed of 108 km/h is observed to coast up a hill and stops at a height 20.5m above its starting point, how much thermal energy was generated by friction in J?
A cyclist starts from rest and coasts down a 4.0∘ hill. The mass of the cyclist plus bicycle is 85 kg. Ignore air resistance and friction. - After the cyclist has traveled 130 m, what was the net work done by gravity on the cyclist? - How fast is the cyclist going?
1.) A book of mass 0.55kg is lifted from the floor to a height of 3.5m at a constant velocity. Recall the definition of work. How much work is done by FLift? By Fg? By Fnet? How much gravitational PE does the book have at the top relative to the floor? 2.)If the object in Q1 is released from rest after it is lifted, what is its kinetic energy just before it hits the floor? What is its speed?
b) How much work has to be done to accelerate 1320kg car from 105km/h to 120km/h?