Download KAHSSO KINE 3030 Mock Midterm 2

KAHSSO KINE 3030 Mock Midterm 2
Disclaimer: This test is meant purely for study purposes; it does not necessarily reflect the format and/or difficulty
of the actual exam, and should not be your only source of studying. Test created by KAHSSO Peer Tutors.
**Answers provided only for short-answer style questions**
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1. Which is true about the triceps when doing a bicep curl with a heavy dumbbell?
a) it is the agonist
b) it is the antagonist
c) it is the protagonist
d) it causes the movement
e) it opposes the movement
f) all of the above
g) only b and e are correct
2. The weaker the muscle, the greater the magnitude of maximum isometric contraction
a) True
b) False
3. Calculate the amount of force produced at the elbow by the biceps brachii inserting at
an angle of 90˚, 3cm away from the radius when the moment of force (torque) is 11Nm.
4. Which of these factors affect the magnitude of friction
a) smoothness of the surface
b) roughness of the surface
c) surface area
d) normal reaction force
e) all of the above
f) only three of the above affect the magnitude of friction
5. If you attempt to move a 700N block with a coefficient of static friction of 0.75 and a
coefficient of kinetic friction of 0.65, how much force should you exert to start the block
in motion and then keep it in motion?
6. If a 1kg block on a horizontal surface is pushed with a horizontal force of 5N and the
resulting acceleration is 3m/s2, what is the magnitude of the frictional force opposing
the motion of the block.
7. Which is false about levers?
a) It is a rigid bar
b) It rotates about a an axis or fulcrum
c) Force applied to a lever moves a resistance
d) In the human body, the muscle acts as the fulcrum
8. In a first class lever, the applied force and resistance are located on the same side of the
axis
a) True
b) False
9. Which is the correct term to describe the mechanical effectiveness of a lever?
a) moment arm
b) mechanical advantage
c) mechanical resistance
d) mechanical support
10. What is true about the Centre of Gravity?
a) Point around which the mass of the body is equally distributed
b) point around which the body is balanced in all directions
c) When the human body acts as a projectile, the body's CG follows a parabolic
trajectory
d) When drawing a weight vector for an object in a free body diagram, the weight
vector acts at the CG
e) all of the above.
11. How much force must be applied by a kicker to give a stationary 2 kg ball an
acceleration of 20m/s²? [40 N]
12. I you are exerting a force of 100 N on the ground how much force is the ground
exerting on you? [100 N]
13. Which of the following best describes the law of inertia
a) the ground exerts a force on you that is equal in magnitude, but opposite in
direction to the force you exert on the ground
b) if you throw a ball it will keep moving at a constant velocity unless acted on
by an external force
c) a force of 10 N will cause a 2 kg ball to accelerate at 5m/s²
d) all go the above
14. Which of the following is a behavioural property of muscle tissue
a) elasticity
b) extensibility
c) irritability
d) ability to develop tension
e) all of the above
15. Activation of the antagonist muscle
a) produces acceleration required for movement
b) produces acceleration in a direction opposite that required for a movement
c) stabilizes a body part
d) all of the above
16. Muscular strength depends on
a) muscle length
b) muscle velocity
c) muscle tension
d) power
e) a and b
17. Muscular power is
a) product of net torque and angular velocity at a joint
b) product of perpendicular distance to the force’s line of action and the force
c) rate of toque produced at a joint
d) ability of a muscle group to generate torque at a particular joint
e) two of the above
18. True or False: The centre of gravity can be located outside of the body.
19. True or False: The longer a muscle, the larger the force.
20. True or False: Free body diagrams are a pictorials representation of Newton’s
second law.
21.If the muscle attached to a bone (with an angle of attachment of 60 degrees) 2 cm away
from the joint center is generation a moment of 5 n.m calculate the force applied by the
muscle.
A. 250 N
B. 116.78 N
C. 288.67 N
D. 189.34 N
22.A 40 kg object is put on the ground. A 20 N force is applied to the object horizontally, but the
object doesn't move. What is the friction force between the object and the ground surface?
A. 392.4 N
B. 20 N
C. 40 N
D. 260.5 N
23.The quadriceps attach to the tibia bone at an angle of 25 degrees 3 cm away from the joint
center. A 7 kg weight is attached to the leg, 30 cm from the joint center. How much force is
required of the quadriceps in order to keep the system in equilibrium?
A. 1624.87 N
B. 1236.9 N
C. 1587.23 N
D. 1741.45 N
24. The first class level's mechanical advantage value is always more than 1.
A. True
B. False
25.The Whiplash mechanism is an example of
A. Law of inertia
B. Law of acceleration
C. Law of reaction
26.40 N force is applied to an object (5 kg) horizontally, which generates an acceleration of 2.4
m/s^2. Calculate the friction force between the object and the ground.
A. 28 N
B. 43 N
C. 25 N
D. 36 N
27. A nutcracker has a mechanical advantage value of less than 1.
A. True
B. False
28. How can we maximize stability?
A. Maximizing the base of support
B. Raising the center of gravity
C. Increasing the potential energy
D. Reducing height
E. A and B
F. A and D
G. A, B and C
H. All of the above
29. Muscle strength depends on
A. Joint angle
B. Muscle elasticity
C. Muscle velocity
D. Two of the above
E. All of the above
30. A box (10 kg) put on the ground is being pushed horizontally by a force of 15 N. The box is
not moving. The co-efficient of friction between the box and the ground is 0.5. What is the
value of friction force?
A. 49 N
B. 50 N
C. 15 N
D. 25 N
31. Which of the following is true?
a. A pinnate fibre arrangement is parallel with the fibres
b. A parallel fibre arrangement is perpendicular to the fibres
c. A parallel fibre arrangement is at an angle to the fibres
d. A and C
e. None of the above
32. If you increase the distance from the centre of rotation to the muscle insertion what
happens in respect to the torque equation?
a. Torque will decrease
b. Torque will increase
c. Muscle force will increase
d. Muscle force will decrease
33. Which of the following is true?
a. A faster lengthening velocity will produce less force
b. A faster lengthening velocity will produce more force
c. A faster shortening velocity will produce less force
d. A faster shortening velocity will produce equal force
34. If you can produce 90 N of force and you produce 10 N/cm2 how large is the muscle
cross sectional area?
a. 10
b. 9
c. 90
d. Can’t be determined
35. Which of the following is true?
a. A first class lever has the fulcrum in the middle
b. A second class lever has the fulcrum in the middle
c. A third class lever has the fulcrum in the middle
d. A third class lever has resistance in the middle
36. Which of the following is true?
a. The centre of gravity is always within the object
b. The centre of gravity can be outside the object
c. The centre of gravity can never be within the object
d. B and C
37. Which of the following is true for static equilibrium to be met?
a. All vertical forces acting on body must be negative
b. All vertical forces acting on body must be zero
c. All vertical forces acting on body must be positive
d. All horizontal forces acting on body must be negative
38. Which of the following is true?
a. Angle of attachment of <90 is destabilizing force
b. Angle of attachment of <90 is stabilizing force
c. Angle of attachment of >90 is stabilizing force
d. None of the above
39. Which of the following is true regarding mechanical advantage?
a. If you increase the moment arm of force you decrease mechanical advantage
b. If you increase the moment arm of force you increase mechanical advantage
c. If you decrease the moment arm of force you increase mechanical advantage
d. None of the above
40. Which of the following is true?
a. Stability is the person’s ability to control equilibrium
b. Stability is the person’s resistance to disruption of equilibrium
c. balance is the person’s resistance to disruption of equilibrium
d. A and C