Question

Which velocity versus time graph or graphs show an object moving with increasing acceleration?

Answer #1

The average acceleration (a) over a time interval is defined as the change of velocity divided by the time interval

a = (ve - v1)/(to - t1)

where v2 and v1 are the instantaneous velocities or simply velocities at time t2 and t1 . It is the average change of velocity per unit time. The SI unit of acceleration is m s–2 .

**Graph of acceleration:**

On a plot of velocity versus time, the average acceleration is the slope of the straight line connecting the points corresponding to (v2, t2) and (v1, t1).

Q1) What is the main difference in position-time graphs between
moving at constant speed and moving with changing speed?
Q2) What is the main difference in velocity-time graphs between
moving at constant speed and moving with changing speed?
Q3) What is the main difference in acceleration-time graphs
between moving at constant speed and moving with changing
speed?
Q4) What is the sign of the acceleration when speeding up and
moving in the positive direction?
Q5) What is the sign of...

Explain the difference between a position vs time, velocity vs
time, and acceleration vs time graphs for simple harmonic
motion.

An object is moving in the X-Y plane. At time t1 the direction
of its velocity, v and acceleration, a are: Direction of v is in
the positive Y direction, Direction of a is in the negative Y
direction.
At time t1, the direction of the velocity of the object is
_______. (changing or not changing)
At time t1, the direction of the net force acting on
the object is _______. Select the coordinate direction of the net
force. (+X,...

Acceleration from acceleration, time graph: 0.686
m/s2
Acceleration from velocity, time graph: 0.686
m/s2
Let’s see what your results would predict for g. Determine this
value using the average of your two acceleration values.
1. Predicted maximum acceleration, aavg/sin(θ) =
___________m/s2
Compare this result to the value assumed in the lab, 9.80
m/s2 by finding the percentage error.
2. Percentage error____________ %
**Please show all work, it is for a lab**

Which one of the following statements is not possible?
An object has zero velocity and non-zero acceleration
An object travels with a northward velocity and a northward
acceleration
An object travels with a constant velocity and a constant
non-zero acceleration
An object travels with a changing velocity and a constant
acceleration
____________
In a displacement vs. time graph, a sloped (non-horizontal)
line indicates:
The object is moving with constant, non-zero, acceleration
The total displacement of the object is zero...

An object with a mass 4.15kg undergoes an acceleration of 2.7
m/s^2 for a period of 8.0s. It then undergoes an acceleration of
-3.2m/s^2 for a period of 20.0s. If the initial velocity of the
object is 6.01 m/s and it first expereinces the acceleration when
it is at the origin, plot by hand on graph paper the force,
velocity, and position as functions of time. Explain why your
graphs look the way they do. Include all relevant equations.

at
time t=0 s, an object is moving on a horizontal plane with a
velocity v0x=1.5 m/s , v0y=3.5 m/s. as the object slides, a
constant acceleration acts on it that has the following components:
ax=-2.3 m/s^2 and ay=4 m/s^2 . determine the magnitude of the
displacement of the object after 2s

An object with a mass of 4.15 kg undergoes an acceleration of
-3.1 m/s2 for a period of 8.0 s. It then undergoes an acceleration
of 5.2 m/s2 for a period of 11.0 s If the initial velocity of the
object is 2.36 m/s and it first experiences the acceleration when
it is at the origin, plot by hand on graph paper (to scale) the
force, velocity, and position as functions of time. Explain why
your graphs look the way...

At the fifth second, the velocity of an object moving along a
horizontal line is -3m/s . The object’s acceleration
function is given by
at=-t2+4.
Find the velocity of the object at the 10th second
of motion.
Find the time when the acceleration is zero.
Starting from 3m, W an object moved according to
vt=2t-3 .
Find the position of the object at the 20th second of
motion.

3. The velocity function of a particle is moving on a coordinate
line is given by ?(?) = 6?^2 − 42? + 60 where ? is in meters per
seconds and ? is in seconds.
a) When is the particle at rest?
b) When does the particle have positive velocity?
c) When does the particle have negative acceleration?
d) When is the particle speeding up?
e) Sketch the position-time graph of the particle and the
acceleration-time graph of the particle...

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