Let radius of curvature of the projectile trajectory at maximum height be “r”, then
The radius of curvature is not equal to maximum height – though expression appears to be same. But, they are actually different. The numerator here consists of cosine function, whereas it is sine function in the expression of maximum height. The difference is also visible from the figure.
Exercise
A particle moves along a circle of radius “r” meter with a time period of “T”. The acceleration of the particle is :
(a)
(b)
(c)
(c)
In order to determine centripetal acceleration, we need to find the speed of the particle. We can determine the speed of the particle, using expression of time period :
A particle moves with a speed of 10 m/s along a horizontal circle of radius 10 m in anti-clockwise direction. The x and y coordinates of the particle is 0,r at t = 0. The velocity of the particle (in m/s), when its position makes an angle 135° with x - axis, is :
(a)
(b)
(c)
(d)
The velocity is a vector quantity. We need to know the components of the velocity when particle makes the angle 135° with x - axis.
The component
is in the reference x - direction, whereas component
is in the negative reference y - direction.
A car moves along a path as shown in the figure at a constant speed. Let
,
,
and
be the centripetal accelerations at locations A,B,C and D respectively. Then
(a)
(b)
(c)
(d)
The curvatures of path at four points are indicated with our circles drawn so that they align exactly with the curved path at these points. The radii of these circles at points A and B are smaller than that at points C and D.
Now, the centripetal acceleration is given by :
The smaller the radius, greater is centripetal acceleration. Thus,
A particle executes uniform circular motion with a speed “v” in xy plane, starting from position (r,0), where “r” denotes the radius of the circle. Then
(a) the component of velocity along x - axis is constant
(b) the component of acceleration along x - axis is constant
(c) the angle swept by the line joining center and particle in equal time interval is constant
(d) the velocity is parallel to external force on the particle
The component of velocity along x - direction is “-v sinθ” and is not a constant. The component of acceleration along x - direction is “
” and is not a constant. The external force in uniform circular motion is equal to centripetal force, which is directed towards the center. Thus, the velocity is perpendicular to external force.
On the other hand, the particle covers equal circular arc in equal time interval. Hence, the angle subtended by the arc at the center is also equal in equal time interval.
A particle executes uniform circular motion with a speed “v” in anticlockwise direction, starting from position (r,0), where “r” denotes the radius of the circle. Then, both components of the velocities are positive in :
(a) first quadrant of the motion
(b) second quadrant of the motion
(c) third quadrant of the motion
(d) fourth quadrant of the motion
From the figure, it is clear that the components of velocity in the fourth quadrant are both positive.
A particle executes uniform circular motion with a constant
speed of 1 m/s in xy - plane. The particle starts moving with constant speedfrom position (r,0), where "r" denotes the radius of the circle. If center of
circle is the origin of the coordinate system, then what is the velocity in"m/s" of the particle at the position specified by the coordinates (3m,-4m)
?
(a)
(b)
(c)
(d)
Here, the inputs are given in terms of coordinates. Thus, we shall use the expression of velocity, which involves coordinates. Velocity of the particle in circular motion is given by :
Communication is effective because it allows individuals to share ideas, thoughts, and information with others.
effective communication can lead to improved outcomes in various settings, including personal relationships, business environments, and educational settings. By communicating effectively, individuals can negotiate effectively, solve problems collaboratively, and work towards common goals.
it starts up serve and return practice/assessments.it helps find voice talking therapy also assessments through relaxed conversation.
miss
Every time someone flushes a toilet in the apartment building, the person begins to jumb back automatically after hearing the flush, before the water temperature changes. Identify the types of learning, if it is classical conditioning identify the NS, UCS, CS and CR. If it is operant conditioning, identify the type of consequence positive reinforcement, negative reinforcement or punishment
nature is an hereditary factor while nurture is an environmental factor which constitute an individual personality. so if an individual's parent has a deviant behavior and was also brought up in an deviant environment, observation of the behavior and the inborn trait we make the individual deviant.
Samuel
I am taking this course because I am hoping that I could somehow learn more about my chosen field of interest and due to the fact that being a PsyD really ignites my passion as an individual the more I hope to learn about developing and literally explore the complexity of my critical thinking skills
hello. autism is a umbrella term. autistic kids have different disorder overlapping. for example. a kid may show symptoms of ADHD and also learning disabilities.
before treatment please make sure the kid doesn't have physical disabilities like hearing..vision..speech problem. sometimes these
Jharna
continue..
sometimes due to these physical problems..the diagnosis may be misdiagnosed.
treatment for autism.
well it depends on the severity.
since autistic kids have problems in communicating and adopting to the environment.. it's best to expose the child in situations where the child
Jharna
child interact with other kids under doc supervision.
play therapy.
speech therapy.
Engaging in different activities that activate most parts of the brain.. like drawing..painting. matching color board game.
string and beads game.
the more you interact with the child the more effective
Jharna
results you'll get..
please consult a therapist to know what suits best on your child.
and last as a parent. I know sometimes it's overwhelming to guide a special kid.
but trust the process and be strong and patient as a parent.
Jharna
Got questions? Join the online conversation and get instant answers!