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2 years ago

What is kinematics . Give two examples

Physics

2 answers:

Wittaler [7]2 years ago

8 0

Answer:

kinematics explains the terms like acceleration, velocity, and position of the objects while in motion.

Some important parameters in kinematics are displacement, velocity, and time.

Explanation:

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Varvara68 [4.7K]2 years ago

6 0

Answer:

<h3>Definition of Kinematics :- </h3>

Kinematics is the study of the motion of mechanical points, bodies and systems without consideration of their associated physical properties and the forces acting on them. ... An example model of bodies in a system is the gears in a vehicle's transmission.

<h3>Example of kinematics :- </h3><h3>The examples for kinematics are given below: -</h3>

i) Moving train and bus.
ii) Motion of a mass on inclined plane.
iii) Running water in the river.
iv) Falling water from a mountain peak.

Explanation:

<h3>Hope this helps you dear ✌️</h3><h2>Carry on learning !! </h2>

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There is a girl pushing on a large stone sphere. The sphere has a mass of 8200 kgand a radius of 90 cm and floats with nearly ze

svetlana [45]

Answer:

35.1688 seconds

Explanation:

M = Mass of sphere = 8200 kg

R = Radius of sphere = 90 cm

F = Force = 30 N

Moment of inertia is given by

$I=\dfrac{2}{5}MR^2\\\Rightarrow I=\dfrac{2}{5}\times 8200\times 0.9^2\\\Rightarrow I=2656.8\ kgm^2$

Torque is given by

$\tau=I\alpha\\\Rightarrow FR=I\alpha\\\Rightarrow \alpha=\dfrac{FR}{I}\\\Rightarrow \alpha=\dfrac{30\times 0.9}{2656.8}\\\Rightarrow \alpha=0.01016\ rad/s^2$

For one rotation

$\theta=\omega_it+\dfrac{1}{2}\alpha t^2\\\Rightarrow 2\pi=0\times t+\dfrac{1}{2}\times 0.01016\times t^2\\\Rightarrow t=\sqrt{\dfrac{2\pi2}{0.01016}}\\\Rightarrow t=35.1688\ s$

The time taken to rotate the sphere from rest is 35.1688 seconds

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