Kinematic and Motion
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Transcript of Kinematic and Motion
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Kinematic and Motion
KJS 2233Mechanic of Machine
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Linear Angular
Type of Motions
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Equations
Linear Motion
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a)Determine the acceleration of a sport car if time taken to hit 100 km/h is 5 second.
b)Determine the distance from starting point to achieve 100 km/h
Example
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a) 5.5 m/s2
b) 69.75m
answer
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An object fall from a building, determine its velocity after 1s and 2s.
Example
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a) 9.81 m/sb) 19.62 m/s
answer
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Example
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Answer
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Equations
Angular Motion
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A gear rotates counter clock wise at constant speed. It moves 300O in 0.5 s. Determine its angular velocity.
Example
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= 100 rpm
Answer
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The mechanism below show the component used in exhaust port of internal combustion engine. Cam forces rocker arm at point B with velocity of 30mm/s. Determine angular velocity of angular plate and velocity at point C.
Example
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W2= vb/rb
=30/20 = 1.5 rad/s Vc= rw =15 mm x 1.5 rad/s =22.5 mm/s
Answer
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An electric motor will speed up to 1800 rpm in
2 s when the power is turned on. Assuming the
speed up is at constant rate. Determine the angular acceleration of motor. Also determine the number of revolutions that the wheel
spins before it is at full speed.
Example
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188.6 rad or 30 revolutions
answer
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Example
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Rev= 82 rev
Answer
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Component of Angular Motion
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A flywheel with diameter of 200 mm accelerates from 2000 rpm to 6000 rpm
within 10 s. Determine its tangent and normal acceleration.
Example
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Answer; 2000 rpm= 209.44 rad/s 6000 rpm= 628.32 rad/s 𝜶=41.892 at = (41.892)x( 0.1)=4.1 At 2000 rpm an= (209.44)2x(0.2) = 8773.02 m/s2
At 6000 rpm an= (628.32)2x(0.2) = 78957.2 m/s2
Answer