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23 Nov 2019

A luge and its rider, with a total mass of 82 kg, emerge from adownhill track onto a horizontal straight track with an initialspeed of 31 m/s. Assume that they stop with a constant decelerationof 2.3 m/s2.
(a) What magnitude F is required for the decelerating force?
____ N

(b) What distance d do they travel while decelerating?
_____ m

(c) What work W is done on them by the decelerating force?
_____kJ

(d) What is F for a deceleration of 4.6 m/s2?
_____N

(e) What is d for a deceleration of 4.6 m/s2?
_____ m

(f) What is W for a deceleration of 4.6 m/s2?
______ kJ

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Bunny Greenfelder
Bunny GreenfelderLv2
16 Aug 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

(a) What magnitude F is required for the decelerating force?
__ N

(b) What distance d do they travel while decelerating?
__m

(c) What work W is done on them by the decelerating force?
__ kJ

(d) What is F for a deceleration of 7.0 m/s2?
__N

(e) What is d for a deceleration of 7.0 m/s2?
__m

(f) What is W for a deceleration of 7.0 m/s2?
__ kJ

*Answers in 3 sig figs please

hi,

i have 5 questions i need the complete solutions with theirfinalresults. is there anyone could help me, i wouldappreciatethat.



1)A worker pushes a sled with a force of 40 N over
a level distance of 6.0 m. If a frictional force of 24 N actsonthe
wheelbarrow in a direction opposite to that of the worker, whatnetwork is
done on the wheelbarrow?



2)
A horizontal force of 200 N is applied to a
55-kg cart across a 10-m level surface. If the cart acceleratesat2.0 m/s2,
then what is the work done by the force of friction as it actstoretard the
motion of the cart?



3)
If both mass and velocity of a ball are tripled,
the kinetic energy is increased by a factor of:

a) 9, b) 12, c) 3, d) 6



4)
A 1 200-kg automobile moving at 25 m/s has the
brakes applied with a deceleration of 8.0 m/s2. How far does thecartravel
before it stops?



5)
Samantha pushes a 50-N crate up a ramp 25.0 m in
length and inclined at 10° with the horizontal. Whatpotentialenergy
change does the crate experience?



thank you in advance

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 30°. 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 7° 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

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