Question

An electric vehicle starts from rest and accelerates at a rate
of 2.1 m/s^{2} 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/s^{2} until it stops. **(a)** How much time
elapses from start to stop? **(b)** How far does the
vehicle move from start to stop

Answer #1

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?

The drive propeller of a ship starts from rest and accelerates
at 2.1 x 10-3 rad/s2 for 2.1 x 103 s. For the next 2 x
103 s the propeller rotates at a constant angular speed. Then it
decelerates at 2 x 10-3 rad/s2 until it slows (without
reversing direction) to an angular speed of 7 rad/s. Find the total
angular displacement of the propeller.

A car starts from rest at a stop sign. It accelerates at 3.6
m/s^2 for 6.5 s, coasts for 1.7 s, and then slows down at a rate of
2.5 m/s^2 for the next stop sign.
How far apart are the stop signs?

A sprinter is practicing her starts on a 100 m long straight
track. From rest, she starts running with an acceleration of 4.2
m/s2 until she reaches her top speed of 10 m/s. Once up to speed,
she immediately relaxes, decelerating slowly at a rate of -1.3 m/s2
until she comes to a stop.
(a) Draw the motion diagram (including velocity vectors) for
the sprinter. Please label her starting point and end point, and
where she reaches her maximum speed....

The drive propeller of a ship starts from rest and accelerates
at 3.00 x 10-3 rad/s2 for 2.47 x 103 s. For the next 1.61 x 103 s
the propeller rotates at a constant angular speed. Then it
decelerates at 2.34 x 10-3 rad/s2 until it slows (without reversing
direction) to an angular speed of 2.35 rad/s. Find the total
angular displacement of the propeller.

A conveyor belt is driven by a 19" diameter pulley. The conveyor
starts from rest and accelerates at a constant rate to 275 RPM in 3
seconds, stays at that speed for 1.8 seconds, and then slows to a
stop at a constant rate in 3.2 seconds.
a) How far will an object on the conveyor travel during this
time?
b) What is the maximum speed of the belt?

The drive propeller of a ship starts from rest and accelerates
at 2.9 x 10-3 rad/s2 for 2.4 x 103 s. For the next 4 x 103 s the
propeller rotates at a constant angular speed. Then it decelerates
at 6 x 10-3 rad/s2 until it slows (without reversing direction) to
an angular speed of 6 rad/s. Find the total angular displacement of
the propeller.
Do not put units in answer.
Do not put answer in scientific notation

A proton accelerates from rest in a uniform electric field of
668 N/C. At some later time, its speed is 1.12 106 m/s. (a) Find
the magnitude of the acceleration of the proton. m/s2 (b) How long
does it take the proton to reach this speed? µs (c) How far has it
moved in that interval? m (d) What is its kinetic energy at the
later time? J

A proton accelerates from rest in a uniform electric field of
654 N/C. At some later time, its speed is 1.22 106
m/s.
(a) Find the magnitude of the acceleration of the proton.
m/s2
(b) How long does it take the proton to reach this speed?
µs
(c) How far has it moved in that interval?
m
(d) What is its kinetic energy at the later time?
J

A person driving a car starts from rest and has a constant
acceleration of 2200 miles/hour2
and does so until he reaches 55 mph. The person then drives at
that constant speed for 14.5 miles. The
person then slows to a stop at a rate of deceleration of 1575
miles/hour2
. Determine (a) how much total
distance the car has traveled in miles and (b) how much total
time in minutes does it take the person to
drive the car...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 minute ago

asked 3 minutes ago

asked 4 minutes ago

asked 4 minutes ago

asked 6 minutes ago

asked 6 minutes ago

asked 9 minutes ago

asked 9 minutes ago

asked 11 minutes ago

asked 12 minutes ago

asked 12 minutes ago

asked 14 minutes ago