PCS 211 Study Guide - Final Guide: Acceleration, Friction, Water Slide

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7 May 2017

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Tutorial on work, energy, and power: beginning from rest when = 20o, a 35 kg child slides with negligible friction down a sliding board in the shape of a 2. 5 m circular arc. Determine the smallest radius of curvature of the track at its lowest point if the car has a speed of 5 ft/s at the crest of the drop. Neglect friction: a sports car has a mass of 2000 kg and an engine efficiency of = 0. 65. Moving forward, the wind creates a drag resistance on the car of fd = 1. 2v2 n, where v is the speed in m/s. Find the engine"s input power when t = 4 s. 1: the collar has a mass of 30 kg and is supported on the rod having a coefficient of kinetic friction of. The spring has an un-stretched length of 0. 2 m and a stiffness of 50 n/m.

Related Questions

A 600-kg car is going over a curve with a radius of 120 m that isbanked at an angle of 25 degrees with a speed of 30.0 m/s. Thecoefficient of static friction between the car and the road is0.30. What is the normal force exerted by the road on thecar?

a. 1590 N
b. 3430 N
c. 3620 N
d. 7240 N
e. 5330 N

A 38.0 kg child swings in a swing supported by two chains, each3.00 m long.
(a) If the tension in each chain at the lowest point is 356 N, findthe child's speed at the lowest point.
m/s
(b) What is the force exerted by the seat on the child at thelowest point? (Neglect the mass of the seat.)

Your firm is designing a new roller-coaster ride. The permitprocess requires the calculation of forces and accelerations atvarious important locations on the ride. Each roller-coaster carwill have a total mass (including passengers) of 800 kg and willtravel freely along the winding frictionless track shown in thefigure below. Points A, E, and G are on horizontal straightsections, all at the same height of 10 m above the ground. Point Cis at a height of 10 m above the ground on an inclined section ofslope angle 30Â°. Point B is at the crest of a hill, while point Dis at ground level at the bottom of a valley; the radius ofcurvature at both of these points is 20 m. Point F is at the middleof a banked horizontal curve with a radius of curvature of 35 m andat the same height as points A, E, and G. At point A the speed ofthe car is 11.1 m/s.

(a) If the car is just barely to make it over the hill at point B,what must be the height of point B above the ground?
__ m

(b) If the car is to just barely make it over the hill at point B,what should be the magnitude of the force exerted by the track onthe car at that point?
__kN

(c) What will be the acceleration of the car at point C?
__ m/s2

(d) What will be the magnitude and direction of the force exertedby the track on the car at point D?
__ kN directed 5 ---Select--- upward downward

(e) What will be the magnitude and direction of the force exertedby the track on the car at point F?
__ kN directed 7Â° upward from the horizontal.

(f) At point G a constant braking force is to be applied to thecar, bringing it to a halt in a distance of 30 m. What is themagnitude of this required braking force?
__ kN

PCS 211 Study Guide - Final Guide: Acceleration, Friction, Water Slide

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