Question

A
car travels along a straight road. It starts from rest and
accelerated in two stages. Each stage takes the same amount of
time. In the first stage, the car speeds up with acceleration 3.0
m/s^2. At the end of the second stage, the cars velocity magnitude
is 2.5 times greater than it is at the end of the first stage. Find
the acceleration magnitude in the second stage.

Answer #1

Consider the first stage

Given that the car starts from rest and speeds up with an acceleration of

Use formula

------(1)

===================

Given that both stages take the same amount of time.

At the end of the 2nd stage, the velocity is 2.5 times greater than it is at the end of first stage

--------(2)

===================

Consider the second stage

Use formula

Put (2) in the above equation

Put (1) in the above equation

**ANSWER:
**

**=======================**

A car starts from a state of rest and drives along a level,
straight road. For the first 30 s, the car speeds up with a
constant acceleration of 2.50 m/s 2 , after which it continues at
the constant velocity that it has acquired for the next 5.00
minutes, at which time the brakes are applied, and there is an
acceleration of -2.2 m/s 2 until the car stops. What is the total
displacement of the car from its...

A race car starts from rest and travels east along a straight
and level track. First part of the motion the car’s velocity is
given by 13 m/s after which it starts to accelerate. What is the
acceleration of the car if it reaches to a velocity of 46.12 m/s
after 19 s.

A car starts from rest and travels east with an acceleration of
4x10^-3 m/s^2. Another car travels toward west at a constant speed
of 70kph. The two cars are 100-km apart. Find (a) the time it takes
for the two cars to meet and (b) the time it takes for them to be
100-km apart for the second time.

A car is traveling along a straight road at a velocity of +35.0
m/s when its engine cuts out. For the next ten seconds the car
slows down, and its average acceleration is a1. For the next five
seconds the car slows down further, and its average acceleration is
a2. The velocity of the car at the end of the fifteen-second period
is +24.2 m/s. The ratio of the average acceleration values is a1/a2
= 1.78. Find the velocity of...

A car starts from rest and travels for 8.0 s with a uniform
acceleration of +1.8 m/s2. The driver then applies the
brakes, causing a uniform acceleration of -2.0 m/s2. If
the brakes are applied for 3.0 s, determine each of the
following.
(a) How fast is the car going at the end of the braking
period?
(b) How far has it gone?

Suppose that a car starts from rest its engine providing an
acceleration of 10gt/s while air resistance provides 0.1 ft/s^2 of
deceleration for each foot per second of the cars velocity
Find
b) Find how long it takes the car to attain 90% of its limiting
velocity and how far it travels while doing so

A car starts from rest and travels for 7.5 s with a uniform
acceleration of +2.8 m/s2. The driver then applies the
brakes, causing a uniform acceleration of −2.5 m/s2.If
the brakes are applied for 1.0 s, determine each of the
following.
(a) How fast is the car going at the end of the braking period?
m/s
(b) How far has the car gone? m

Consult Interactive Solution 2.22 before beginning this problem.
A car is traveling along a straight road at a velocity of +39.7 m/s
when its engine cuts out. For the next 2.18 seconds, the car slows
down, and its average acceleration is . For the next 6.86 seconds,
the car slows down further, and its average acceleration is . The
velocity of the car at the end of the 9.04-second period is +20.2
m/s. The ratio of the average acceleration values...

a
car starts from rest and travels 8.0s with a uniform acceleration
of +2.0 m/s^2. the driver then applies the brakes, causing a
uniform acceleration of -3.0 m/s^2. if the brakes are applied for
5.0s, determine each of the following.
a. how fast is the car going at the end of the braking
period?
b. how far has the car gone?

A taxi driver starts his car from rest and drives at a constant
speed of 13.5 m/s along a straight road toward the west. After
driving for 10.0 s, the car reaches a sharp turn in the road and
now travels in the direction of 53.5° south of west. Immediately
after turning, the taxi driver slows down his car at 1.22 m/s2 in
order to stop and pick up a passenger. It takes 7.00 s for the car
to stop...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 minute ago

asked 5 minutes ago

asked 22 minutes ago

asked 40 minutes ago

asked 45 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago