Acceleration in Mechanisms topics include: Acceleration in mechanism, acceleration of point on a link, slider crank mechanism and coriolis component. In mechanics, acceleration is the rate of change of an object's velocity over time. It is a vector quantity, meaning it has both magnitude and direction. The SI unit for acceleration is the meter per second squared (ms).  Acceleration analysis of a mechanism consists of formulating and solving equations to determine the passive joint accelerations of the mechanism from the active joint accelerations of the mechanism, and vice versa.  The... Show more

Acceleration in Mechanisms topics include: Acceleration in mechanism, acceleration of point on a link, slider crank mechanism and coriolis component.

In mechanics, acceleration is the rate of change of an object's velocity over time. It is a vector quantity, meaning it has both magnitude and direction. The SI unit for acceleration is the meter per second squared (ms). 

Acceleration analysis of a mechanism consists of formulating and solving equations to determine the passive joint accelerations of the mechanism from the active joint accelerations of the mechanism, and vice versa. 
The acceleration of the coupler point C can be obtained from the second derivative of the position vector. After the solution of the position, velocity and acceleration loop equations, one can easily determine the position, velocity and acceleration of any point in any one of the links of the mechanism. 
 

Related Test: Machine Kinematics Practice Test: Velocity in Mechanisms

Show less

Machine Kinematics Practice Test: Acceleration in Mechanisms

Time left 00:00

25 Questions

1. The component of the acceleration directed towards the center of rotation of a revolving body is known as ____________ component.

tangentialcentripetalcoriolisnone of these

2. What will be the shape of the velocity diagram of the slider crank mechanism if there are three links including the slider.

SquareParallelogramTriangleTrapezium

3. In a shaper machine, the mechanism for tool feed is

Ratchet and Pawl mechanismWard Leonard systemWhitworth mechanismGeneva mechanism

4. A point is moving at the end of the link rotating with constant angular velocity ω, what will be the value of tangential component of acceleration?

ω2R/20Infiniteω2R

5. The instantaneous centers of a slider moving in a curved surface lies at

their point of contactthe center of curvatureinfinitythe pin point

6. Which of the following are examples of forced closed kinematic pairs?
1. Cam and roller mechanism
2. Door closing mechanism
3. Slider crank mechanism
4. Automotive clutch operating mechanism
Select the correct answer using the codes given below:

2,3 and 41,2,3 and 41,2 and 41 and 3

7. In the given figure, the direction of radial velocity vector and angular velocity is given what will be the direction of coriolis force?

Perpendicular to radial velocity vector towards leftPerpendicular to radial velocity vector towards rightAlong the radial velocity vectorOpposite to radial velocity vector

8. Angular acceleration of a link AB is given by

centripetal acceleration/lengthtotal acceleration/lengthtangential acceleration/lengthnone of these

9. Which component of acceleration is parallel to the given link?

CoriolisRadialTangentialPseudo

10. List I List II
A. Sliding pair 1. A road roller rolling over the ground
B. Revolute pair 2. Crank shaft in a journal bearing in an engine
C. Rolling pair 3. Ball and socket joint
D. Spherical pair 4. Piston and cylinder
5. Nut and screw"

A-5,B-2,C-4,D-3A-5,B-3,C-4,D-2A-4,B-2,C-1,D-3A-4,B-3,C-1,D-2

11. A slider moves with uniform velocity v on a revolving link of length r with angular velocity of ω. The Coriolis acceleration component of a point on the slider relative to a coincident point on the link is equal to

2rω perpendicular to the link2ωv perpendicular to the link2ωv parallel to the link2rω parallel to the link

12. The fixed instantaneous center of mechanism

none of theseall of theseremains at the same place for all configurationsvaries with the configuration

13. f = 3 (n – 1) – 2j. In the Gruebler’s equation for planer mechanisms given, j is the

Number of mobile linksNumber of linksNumber of lower pairsLength of the longest link

14. The space centrode of a circular disc rolling on a straight path is

a straight linecircleparabolanone of these

15. The tangential component of acceleration is maximum when the link rotates with a constant angular velocity.

TrueMaybeFalseDon't Know

16. The speed of driving shaft of a Hooke’s Joint of angle 19.5⁰ is 500 r.p.m. The maximum speed of the driven shaft is nearly

444 r.p.m.168 r.p.m.531 r.p.m.471 r.p.m.

17. Which component of acceleration is parallel to the velocity of given link?

CoriolisTangentialPseudoRadial

18. In a slider crank mechanism, the crank rotates with a constant angular velocity of 300 rpm, Length of crank is 150mm, and the length of the connecting rod is 600mm. Determine linear velocity of the midpoint of the connecting rod in m/s. Crank angle = 45° from IDC.

4.14.44.85.2

19. In a slider crank mechanism, the crank rotates with a constant angular velocity of 300 rpm, Length of crank is 150mm, and the length of the connecting rod is 600mm. Determine acceleration of the midpoint of the connecting rod in m/s². Crank angle = 45° from IDC.

252117144148

20. Calculate the coriolis component of acceleration in m/s² from the following data:
ω = 12 rad/s
v = 2 m/s
R = 1 m

3661224

21. Slider crank chain is an inversion of the four bar mechanism.

Don't KnowFalseTrueMaybe

22. Coriolis component of acceleration exists when there is relative motion between two points from the ground frame.

MaybeFalseDon't KnowTrue

23. In a slider crank mechanism. the maximum acceleration of slider is obtained when the crank is

exactly midway position between the two dead centresslightly in advance of the midway position between the two dead centresat the outer dead centre positionat the inner dead centre position

24. If the normal component of the acceleration is doubled, what will be the effect on the radial component?

Becomes 4 timesRemains sameHalvedDoubled

25. The instantaneous center of rotation of a circular disc rolling on a straight path is

at the center of the discat infinityat their point of contactat the center of gravity of the disc