15-101. The 800-1b roller-coaster car starts from rest onthe track having the shape of a cylindrical helix. If the helixdescends 8 ft for every one revolution, determine the speedof the car when t=4 s. Also, how far has the car descendedin this time? Neglect friction and the size of the car.T8 ft8 ft

Given Weight of the roller coaster = 800lb Time = 4s To find Speed of the car at t = 4 s Distance…

Answered: 15-101. The 800-1b roller-coaster car…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The small body has a speed va = 4.0 m/s at point A. Neglecting friction, determine its speed at point B after it has risen 0.68 m. Is knowledge of the shape of the track necessary? 0.68 m 4.0 m/s B Answer: VB = i m/s
*15-104. A 4-lb ball B is traveling around in a circle of radius r, = 3 ft with a speed (vg), = 6 ft/s. If the attached cord is pulled down through the hole with a constant speed v, = 2 ft/s, determine how much time is required for the ball to reach a speed of 12 ft/s. How far r, is the ball from the hole when this occurs? Neglect friction and the size of the ball. Bn = 3 ft (UB)1 = 6 ft/s v, = 2 ft/s
The 69-kg crate is stationary when the force Pis applied. Determine the resulting acceleration of the crate if (a) P = 0, (b) P = 239 N, and (c) P = 493 N. The acceleration is positive if up the slope, negative if down the slope. H, = 0.25 HE = 0.18 69 kg 18
ı need answer and solution way please
52
The 13.3-in. spring is compressed to a 6.9-in. length, where it is released from rest and accelerates the sliding block A. The acceleration has an initial value of 280 ft/sec² and then decreases linearly with the x-movement of the block, reaching zero when the spring regains its original 13.3-in. length. Calculate the time t for the block to go (a) 3.2 in. and (b) 6.4 in. -6.9" -13.3" Answers: To go 3.2 in., t= To go 6.4 in., t = i sec sec
At the instant θ = 22 degrees, the 61 lb bob is momentarily at rest. Given that R=9.9 ft, answer the following: Determine the speed of the bob when θ = 67 degrees Determine the tension in the cord when θ = 67 degrees
The 1.62-oz golf ball is struck by the five-iron and acquires the velocity shown in a time period of 0.0015 sec. Determine the magnitude Rof the average force exerted by the club on the ball. What acceleration magnitude a (measured in "g"s) does this force cause, and what is the distance d over which the launch velocity is achieved, assuming constant acceleration? V = 151 ft/sec 21° Answers: R = i Ib a = i d = i in.
2. Determine the kinetic energy of the 60-lb block A at this instant if the 40-ib block B is traveling uphill with a speed of 1.5 ft/s. Also calculate the kinetic energy of block B. 60° 30
7
The 214000-lb space-shuttle orbiter touches down at about 222 mi/hr. At 182 mi/hr its drag parachute deploys. At 40 mi/hr, the chute is jettisoned from the orbiter. If the deceleration in feet per second squared during the time that the chute is deployed is -0.000200v2 (speed v in feet per second), determine the corresponding distance s traveled by the orbiter. Assume no braking from its wheel brakes. Answer: s = i ft

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