Question

Why driving slowly is recommended. A car traveling at 60-mi/h can stop within a distance

d=20m. Ifthesamecarwastravelingat100- mi/h, a) how much distance (d ) is required to

stop the car? b) What is its acceleration (a). Your answer must be in SI units.

Answer #1

When traveling 40 mph (miles per hour), the distance that it
takes Fred’s car to stop varies evenly between 120 and 155 feet.
(This includes the reaction distance and the braking distance.) All
of the questions are related to the stopping distance when Fred is
traveling 40 mph.
a) Let S be the distance it takes for Fred’s car to stop at when
traveling 40 mph. Find the distribution, parameter(s), and support
of S.
b) What is the probability that...

What force is required to slow a 1250-kg car traveling 115 km/h to
30.0 km/h within 3.50 s? (a) How far does the car travel during its
deceleration? (b) How long does it take for the car to come to a
complete stop at this same rate of deceleration?

A 1,500 − ?? car is traveling at 100 ??/h. The driver sees a
slow truck ahead and slows down to 60 ??/h. a. Find the initial and
final energy of the car and the work done on it to slow it down. b.
If the car completes its deceleration in 9.0 ?, find the mean
braking power. c. A typical car can be made to stop from 100 ??/h
in a minimum distance of 60 ? if the pavement...

A car traveling 77 km/h slows down at a constant 0.50 m/s2 just
by "letting up on the gas."
Part A
Calculate the distance the car coasts before it stops.
Express your answer to two significant figures and include the
appropriate units.
Part B
Calculate the time it takes to stop.
Express your answer to two significant figures and include the
appropriate units.
Part C
Calculate the distance it travels during the first second.
Express your answer to two significant...

a) A mildly restored ‘Knight-Rider’ 1989 Pontiac Trans Am GTA
powered by a 5.7 litre V8 can do a quarter mile S from rest in a
time t of about 15 seconds. Using distance: S=a t2 /2 , force: F=ma
and work: W=FS, calculate the amount of work (energy) in kJ
required to do the standing quarter mile given that the mass (m) of
this Trans Am is 3,500 pounds. Assume that the acceleration (a) is
constant. (This is not...

1. Dynamics and artificial gravity.
The space station has two thrusters pointed in opposite
directions. They operate by expelling propellant at high speed. The
effect is that there is a force of magnitude F0 on the
two ends of the space station in opposite directions, which causes
the entire object to start rotating. The thrusters will stop firing
when the artificial gravity created on the space station (described
below) reaches the required value.
Upward force, magnitude F0
Downward force, magnitude...

Two boxes are stacked, with box B placed on top of box A. If box
A is pushed such that both boxes move with a decreasing speed, is
there any friction on either box?
(a) Kinetic friction on box A and no friction on box B (b)
Kinetic friction on box A and static friction on box B
(c) Kinetic friction on box A and kinetic friction on box B (d)
Static friction on box A and kinetic friction on...

ch 6
1:
It is generally a good idea to gain an understanding of the
"size" of units. Consider the objects and calculate the kinetic
energy of each one.
A ladybug weighing 37.3 mg
flies by your head at 3.83 km/h
.
×10
J
A 7.15 kg
bowling ball slides (not rolls) down an alley at 17.5 km/h
.
J
A car weighing 1260 kg
moves at a speed of 49.5 km/h.
5:
The graph shows the ?-directed force
??...

1. Is NASCARs main goal to maximize profits? If not, what is
their major goal? Is there a tradeoff involved here?
2. Is the motivation for the actions described in the NYT
article (safety changes, blackbox data collection) connected to
their goal? Explain.
3. If people tune in to see crashes (Nascar fans love crashes
the way hockey fans love fights; when you watch the Speed Channel's
edited replays of Nascar races, the plot is always the same: green
flag,...

How can differential analysis be applied here to
determine if it would be profitable to invest in new equipment to
increase capacity for a constrained resource?
KRAYDEN’S CYCLE COMPONENTS INTRODUCTION: COMPANY, PRODUCT, AND
SUPPLY CHAIN
Krayden’s Cycle Components (KCC) is a high-end specialty
fabricator that manufactures one product with many variants. The
basic product is known as a rolling chassis, a key component used
in manufacturing motorcycles. While there are variations across the
industry, a rolling chassis typically consists of...

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