Question

A car stating from rest accelerates at 2 m/s^{2} for 5
seconds. The driver then maintians a steady speed for 12 seoncds.
The car the undergoes an accelration of -2.5m/s^{2} until
it reaches a speed of 4 m/s. **A.** what was the speed
of the car after 2 seconds? **B.** how far did the car
travel during the interval of constant speed? **C.**
how much time did the car spend slowing down? **d.**
what was the total distane the car traveled?

Answer #1

a)

v = at =2*2 = 4 m/s

========

b)

Final velocity after 5 seconds

v = 2*5= 10m/s

Distance travelled = v*t = 10*12 = 120 m

========

c)using 1st equation of motion

t = (10-4)/2.5

t = 2.4 seconds

=====

d) distance travelled during Acceleration

d1 = 0.5* 2* 5*5 = 25m

Distance during constant speed

d2 = 120 m

Distance travlled during deceleration

d3 = (100 - 16)/(2* 2.5)

d3 = 16.8 m

Net distance = d1 + d2 + d3 = 161.8 m

========

Comment in case any doubt.. Goodluck

A car starts from rest at a stop sign. It accelerates at 2.0
m/s2 for 7.0 seconds, coasts For 2.7 s, and then slows down at a
rate of 1.5 m/s2 for the next stop sign. How far apart are the stop
signs?

An electric vehicle starts from rest and accelerates at a rate
of 2.1 m/s2 in a straight line until it reaches a speed
of 19 m/s. The vehicle then slows at a constant rate of 1.3
m/s2 until it stops. (a) How much time
elapses from start to stop? (b) How far does the
vehicle move from start to stop

An electric vehicle starts from rest and accelerates at a rate
of 1.9 m/s2 in a straight line until it reaches a speed of 22 m/s.
The vehicle then slows at a constant rate of 1.2 m/s2 until it
stops. (a) How much time elapses from start to stop? (b) How far
does the vehicle move from start to stop?

A subway train accelerates from rest at one station at a rate of
1.20 m/s2 for 1/3 of the distance to the next station,
then maintains a constant speed for 1/3 of the trip, then starts
slowing down at this same rate it accelerated initially for the
final 1/3 of the trip. If the stations are 3100 m apart, find
The time of travel between stations
The maximum speed of the train.

1. Starting from rest, it took you 12 seconds to accelerate your
car to 24 m/s at a constant acceleration. Find your
acceleration.
2.A prototype car starts from rest and accelerates at a constant
rate to 60 m/s in 5.1 seconds. How much distance did the car travel
during the 5.1-second accelerated motion?
3. A speeding driver noticed a police car parked about 443 m in
from of him on the side of the road and reduced his speed at...

The wheels on a car have a radius of 0.250 m. The car starts
from rest and the driver accelerates the car at a constant rate and
reaches a speed of 47.0 miles per hour in 7.0 s. a) Calculate the
angular acceleration of the wheels of the car. b) The driver
applies the brakes for 5.0 s which decelerates the car at a rate of
15.0 rad/s2. Calculate the total distance the car traveled during
the entire 12.0 s...

In a quarter-mile drag race, two cars start simultaneously from
rest, and each accelerates at a constant rate until it either
reaches its maximum speed or crosses the finish line. Car A has an
acceleration of 10.6 m/s2 and a maximum speed of 104
m/s. Car B has an acceleration of 11.7 m/s2 and a
maximum speed of 87.5 m/s. (a) Which car wins the
race? (b) By how many seconds does this car win
the race?

Starting from rest, a car first accelerates at a rate of (2.00 +
A/10) m/s2 for (1.20 + B) seconds and then continues at
the resulting speed for (24.0 + C) seconds. Determine the total
displacement in meters of the car during this time. Round your
answer to three significant figures.
A = 8
B = 1
C = 12

Car A starts from rest and accelerates in the x-direction at 4
m/s^2 at the precise moment that it is passed by Car B traveling in
the same direction at a constant speed of 40 m/s. (Draw a free-body
diagram).
a) How long does it take Car A to catch Car B?
b) How far has Car A traveled when it catches Car B?
c) How fast is Car A traveling when it catches Car B?
...

A body accelerates from rest at a rate of 6.5 m/s^2 for 6.0
seconds. The body then accelerates at twice the rate as the first
part for the same amount of time. How far does the box travel
during this entire motion to the nearest tenth of a meter?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 13 minutes ago

asked 37 minutes ago

asked 1 hour ago

asked 1 hour 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 2 hours ago

asked 2 hours ago