Acceleration of an object in free fall motion is 9.81 m/s^(2).
Sometimes the question asks a...
Acceleration of an object in free fall motion is 9.81 m/s^(2).
Sometimes the question asks a question, some answers write the
acceleration as negative and sometimes as a positive!. Can somebody
tells me when should I write it as a negative and when it’s
positive?.
Solutions
Expert Solution
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An object of mass 4.15 kg undergoes an acceleration of 3.5 m/s^2
for a period of 7.0 seconds. It then undergoes an acceleration of
-4.2 m/s^2 for a period of 18.0 seconds. If the initial velocity of
the object is 4.01 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 graphs as functions of time.
Explain why your graphs look the way they...
(a) A fundamental law of motion states that the acceleration of
an object is directly proportional to the resultant force exerted
on the object and inversely proportional to its mass. If the
proportionality constant is defined to have no dimensions,
determine the dimensions of force. (Use the following as necessary:
M, L, and T.)
(b) The newton is the SI unit of force. According to the results
for (a), how can you express a force having units of newtons using...
The free-fall acceleration on Mars is 3.7 m/s2 (a) What length pendulum has a period of 2.0-s on Earth? (b) What length pendulum would have a 2.0-s period on Mars? An object is suspended from a spring with force constant 10 N/m. (c) Find the mass suspended from this spring that would result in a 2.0 s period on Earth. (d) Find the mass suspended from this spring that would result in a 2.0 s period on Mars.
The free-fall acceleration on Mars is 3.7 m/s2.
(a) What length of pendulum has a period of 2.4 s on
Earth?
cm
(b) What length of pendulum would have a 2.4-s period on
Mars?
cm
An object is suspended from a spring with force constant 10
N/m.
(c) Find the mass suspended from this spring that would result
in a period of 2.4 s on Earth.
kg
(d) Find the mass suspended from this spring that would result in a...
Consider the following descriptions of the vertical motion of an
object subject only to the acceleration due to gravity. (Note: the
acceleration due to gravity is 9.8 m divided by s squared.) a.
Find the velocity of the object for all relevant times. b. Find the
position of the object for all relevant times. c. Find the time
when the object reaches its highest point (What is the height?)
d. Find the time when the object strikes the ground. A...
Free Fall on Different Worlds Objects in free
fall on the earth have acceleration ay=−9.8m/s2ay=−9.8m/s2. On the
moon, free fall acceleration is approximately 1/61/6 of the
acceleration on earth. This changes the scale of problems involving
free fall. For instance, suppose you jump straight upward, leaving
the ground with velocity vivi and then steadily slowing until
reaching zero velocity at your highest point. Because your initial
velocity is determined mostly by the strength of your leg muscles,
we can assume...
A small object begins a free-fall from a height of ?=87.5
mH=87.5 m at ?0=0 st0=0 s. After τ=2.25 sτ=2.25 s, a second small
object is launched vertically up from the ground with an initial
velocity of ?0=41.4 m/sv0=41.4 m/s. At what height from the ground
will the two objects first meet?
Part A If a car has a linear acceleration of 1.8 m/s^2 and the
radius of its wheels is 0.33 m, what is the angular acceleration of
the wheels?
a. 0.18 rad/s 2
b. 0.59 rad/s 2
c. 5.5 rad/s 2
d. 9.8 rad/s 2
Part B Given the angular acceleration in the previous problem,
how many revolutions does one of the car’s wheels complete in 10.0
s? Assume the car is initially at rest.
An object with a mass of 4.15 kg undergoes an acceleration of
2.7 m/s2 for a period of 8.0 s. It then undergoes an acceleration
of -3.2 m/s2 for a period of 20.0 s If the initial velocity of the
object is 6.01 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...
The projectile motion equation is s(t)=-16t^2+vt+h where s(t)
represents the distance or height of an object at time t, v
represents the initial speed of the object in ft/s, and h is the
initial height of the object, measured in feet.
If an object is starting at rest, then v=0 (such as for a penny
being dropped from a building). If the object is starting from the
ground, h=0. The baseball or cannonball situations, each have an
initial velocity. For...