About Machine Kinematics

How Machine Kinematics Works: The Science Behind Motion and Movement

Have you ever wondered how machines move? How do they create the motion we see in everyday life?

Kinematics is the study of motion without regard to the forces that cause it. In other words, it's the science of movement. And machine kinematics is the application of this science to machines.

Machine kinematics deals with the movement of parts in a machine, and the forces and energy required to make that happen. It's the study of how machines work - how they move and how they create the things we use in our everyday lives. So, how does machine kinematics work? Let's take a look at the science behind motion and movement.

Kinematics is the branch of mechanics that deals with the motion of objects without regard to the forces that cause it. Machine kinematics is the study of machine movement. It's concerned with the movement of parts in a machine, and the forces and energy required to make that happen.

Wrapping Up

Kinematics is a branch of physics, and machine kinematics is a branch of engineering. The study of machine kinematics can be divided into two main areas: statics and dynamics. Statics is the study of objects at rest, and dynamics is the study of objects in motion.

Following are some of the multiple choice questions on the Machine Kinematics with answers that will help the students in developing their knowledge.

Machine Kinematics MCQ

1. If a pinball machine launches a ball to a top speed of 25 m/s, with an acceleration of 15 m/s2 in a time of 0.40 seconds. What is the pinball's starting velocity (assume it is not zero)?

  • 19 m/s
  • 5 m/s
  • 22 m/s
  • 21 m/s

2. A jaguar takes 2.8 seconds to run 46.4 meters. Determine the jaguar's speed.

  • 0.060 m/s
  • 17 m/s
  • 44 m/s
  • -17 m/s

3. Alexis is riding her bike around town. She travels 43.2 m to the right, and then turns around to bike an additional 30 m to the left. Determine the velocity of Alexis's bike ride if it takes her 39.4 seconds to complete her motion.

  • 2 m/s to the right
  • 2 m/s to the left
  • 0.3 m/s to the right
  • 0.3 m/s to the left

4. What does a horizontal line on a distance vs time graph tell us about the motion of the object?

  • Slowing down
  • Speeding up
  • Standing still
  • In free fall

5. What does a horizontal line on a velocity vs time graph tell us about the motion of an object?

  • Constant speed
  • Standing still
  • Slowing down
  • Speeding up

6. What does a constant velocity do tour our acceleration?

  • Acceleration increases
  • Acceleration decreases
  • Acceleration is zero
  • Acceleration is not affected by velocity

7. A ball is launched from a spring on the floor with an initial velocity of 32 m/s. It then comes to a stop in 4.3 seconds. Determine the acceleration of the ball.

  • +12 m/s2
  • -7.4 m/s2
  • -12 m/s2
  • +7.4 m/s2

8. A chinchilla starts moving from rest and is accelerating at a rate of 1.3 m/s2 for 2.8 seconds. What is the chinchilla's final velocity?

  • 2.2 m/s
  • 0.45 m/s
  • 6.1 m/s
  • 3.6 m/s

9. What are our units for acceleration?

  • m
  • m/s2 or meters/second/second
  • N
  • m/s or meters/second

10. How can you change the acceleration of an object?

  • Speed the object up
  • Keep the object at a constant speed
  • Slow the object down
  • Change the object's direction

11. Imagine Mr. Gomez spinning a yo-yo in a circular motion with a constant speed. Would the yo-yo have an acceleration during its motion?

  • Yes; the displacement is changing, resulting in a changing acceleration
  • No; objects at a constant speed always have zero acceleration
  • No; acceleration does not apply to centripetal (circular) motion
  • Yes; the direction is constantly changing, which changes the acceleration

12. Vionni is jogging at a speed of 1.9 m/s, when she hears about a sale at the local heladerĂ­a (ice cream shop). Vionni accelerates at a rate of 0.20 m/s2 for the next 15 seconds until she arrives at the shop. Find Vionni's final velocity.

  • 4.9 m/s
  • 2.0 m/s
  • 7.3 m/s
  • 0.13 m/s

13. A Frisbee is tossed from rest and reaches a top velocity of +54 m/s in 3.2 seconds. Determine the displacement of the Frisbee's motion.

  • -170 m
  • +76 m
  • +170 m
  • -76 m

14. A roller coaster accelerates at a rate of 30.0 m/s2 from the station to reach a loop in 3.80 seconds. If starting from rest, how far did the roller coaster travel before it reaches the loop?

  • 217 m
  • 180 m
  • 110 m
  • 7.9 m

15. A sports car travels a distance of 450 meters while attaining a certain top speed. If the car's acceleration is 23 m/s2 after starting with a speed of 89 m/s, what would be the car's top speed?

  • 50 m/s
  • 150 m/s
  • 285 m/s
  • 170 m/s

16. A dog runs with an initial speed of 7.5 m/s to a stop in 15 seconds. What is the dog's acceleration?

  • -7.5 m/s
  • -7.5 m/s2
  • -0.5 m/s2
  • 7.5 mi//hr

17. A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00 s. How far does the car travel during those 5.00 seconds before it stops?

  • 4.20 m
  • 52.5 m
  • 105 m
  • 158 m

18. A quantity that is has magnitude and direction is referred to as a

  • vector quantity
  • scalar quantity

19. A car slows down from +32 m/s to +8 m/s in 4 s. The acceleration is

  • 6 m/s/s opposite the motion
  • 2m/s/s in the direction of motion
  • 8 m/s/s opposite the motion
  • none of the above

20. The unit we use to measure acceleration is ___.

  • meters / second 
  • meters 
  • seconds 
  • meters / second / second 

21. A rigid link is one which does not undergo any deformation while transmitting motion.

  • movable link
  • flexible link
  • rigid link
  • fluid link

22. If two moving elements have surface contact in motion, such pair is known as

  • sliding pair
  • rolling pair
  • surface pair
  • lower pair

23. Which of the following disciplines provides study of inertia forces arising from the combined effect of the mass and motion of the parts?

  • theory of machines
  • applied mechanics
  • kinematics
  • kinetics

24. Which of the following disciplines provides study of relative motion between the parts of a machine?

  • theory of machines
  • applied mechanics
  • kinematics
  • kinetics

25. The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as

  • turning pair
  • rolling pair
  • sliding pair
  • spherical pair

26. The SI unit for length or distance is

  • foot (ft)
  • inch (in)
  • mile (mi)
  • meter (m)

27. The SI unit for time is

  • second (s)
  • minute (min)
  • hour (hr)
  • year (yr)

28. What is the SI unit for acceleration?

  • m/s
  • m
  • m/s2
  • s

29. What is the SI unit for speed and velocity?

  • Km
  • s
  • m/s
  • m/s2

30. How much time would it take for an object to fall 4.7 meters?

  • 0.959 s
  • 4.79 s
  • 0.979 s
  • none of the above

31. If a car is traveling forward at 15 m/s, how fast will it be going in 1.2 seconds if the acceleration is -10 m/s2?

  • 27 m/s
  • 3 m/s
  • -27 m/s
  • -3 m/s

32. A boat travels 12.0 m while it reduces its velocity from 9.5 m/s to 5.5 m/s. What is the magnitude of the boat’s acceleration while it travels the 12.0 m?

  • 1.3 m/s2
  • 2.5 m/s2
  • 3.0 m/s2
  • 7.5 m/s2

33. An airplane lands on a runway with a velocity of 150 m/s. How far will it travel until it stops if its rate of deceleration is constant at -3 m/s2?

  • 525 m
  • 3750 m
  • 6235 m
  • 9813 m

34. A ball is thrown downward from the top of a roof with a speed of 25 m/s. After 2 s, its velocity will be:

  • 19.6 m/s
  • -5.4 m/s
  • -44.6 m/s
  • 44.6 m/s

35. A change in velocity over time is known as:

  • acceleration
  • constant speed
  • average speed
  • displacement

36. The speedometer on your car tells you

  • average velocity
  • instantaneous velocity
  • average speed
  • instantaneous speed

37. A cheetah travels 75 m in 3 s. What is her velocity over the interval?

  • 225 m/s
  • 25 m/s 
  • 0.04 m/s
  • none of the above

38. An object is NOT accelerating if it is moving

  • in a circle
  • at constant velocity 
  • at increasing speed
  • only as influenced by gravity

39. Speed is a __________ quantity and velocity is a __________ quantity.

  • scalar, vector
  • vector, scalar

40. A _________ quantity is completely described by magnitude alone. A _________ quantity iscompletely described by a magnitude with a direction.

  • vector, scalar
  • scalar, vector

41. An object can be moving for 10 seconds and still have zero displacement.

  • True
  • False

42. A quantity that is ignorant of direction is referred to as a

  • vector quantity
  • scalar quantity

43. A ________link is one which is formed by having a fluid in a container and the motion is transmitted through the fluid by pressure

  • fluid
  • flexible
  • rigid
  • pneumatic

44. A _________________ link is one which is partly deformed in a manner not to affect the transmission of motion.

  • rigid
  • fluid
  • flexible
  • separate

45. A __________ link is one which does not undergo any deformation while transmitting motion.

  • flexible
  • rigid
  • fluid
  • separate

46. It is the branch of theory of machine which deals with the study of relative motion between the various parts of the machine is __________.

  • kinetics
  • dynamics
  • kinematics
  • static

47. It is an assemblage of a number of resistant bodies (known as members) having no relative motion between them and meant for carrying loads having straining action is _____________.

  • Machine
  • structure
  • Mechanism
  • Force

48. A _________is a device which receives energy and transforms it into some useful work.

  • force
  • structure
  • mechanism
  • machine

49. It deals with the forces and their effects when the machine parts are at rest is ___________________.

  • statics
  • kinetics
  • kinematics
  • pair

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