Biomechanics Quiz Questions

false

True or false: if you miss a lab, you can get the data from one of your classmates to write your lab report.

b

You scored a three on a quiz, you can

a. Retake it and get a maximum of 6.

b. Retake it and get a maximum of 7.5.

c. Retake it and get the full score.

d. Cannot retake it.

false

True or false: A force plate is used to study Kinematics

false

True or false: Rigid body mechanics apply to the human body because the human body is a rigid body.

third

For every action there is an equal and opposite reaction is a statement of Newton's _____ law.

kinematics, kinetics

Rigid body mechanics is divided into _____, which is a description of motion. Without considering their cause and ____, which is the study of the effect of force.

false

True or false: Statics deals with bodies that are not moving or experiencing acceleration.

d

Which of the following is not a basic dimension of measurement?

a. pressure

b. force

c. mass

d. more than one of the above

a

The slug is ____

a. The English unit for Mass.

b. The SI unit for Mass.

c. The English unit for force

d. The SI unit for Force.

linear, angular

_____movement is characterized by no change in orientation, while ____movement is characterized by a change in orientation.

b

Vector direction is determined using the ____ coordinate system.

a. cartesian

b. polar

c. both a and b

d. neither a or b

false

True or false? Human running is an example of angular motion.

false

True or false? The difference between a vector and scalar is that a vector has magnitude, while a scalar has magnitude and direction.

a

When comparing distance and displacement, we know.

a. Distance is a scalar and displacement is a vector.

b. Distance is a vector and displacement is A scalar.

c. Both distance and displacement are vectors.

d. Both distance and displacement are scalar.

0

Ian ran one lap around a 400m track. His displacement is ____meters.

d

Peyton ran one lap around a 400m track in 100 seconds. His speed was ___m/s

a. 0

b. 1

c. 2

d. 4

0

Peyton ran one lap around a 400m track in 100 seconds. His velocity was ___m/s

s

The symbol for speed is___

true

True or false? You can calculate velocity by dividing displacement by time.

false

True or false? Acceleration can be a vector or scalar depending on the situation.

b

Jacob was speeding up in the negative direction, his acceleration was ___

a. positive

b. negative

c. either a or b

d. neither a or b

c

Acceleration is measured in ____

a. m

b. m/s

c. m/s²

d. m/s³

true

True or false? If you calculate instantaneous speed and average speed, you will most likely get different answers.

speed

From lab we know that if we multiply step length by step rate we get ____

d

An angle is determined by the orientation of _____

a. two lines

b. two planes

c. a line and a plane

d. more than one of the above

true

True or false? When you say the elbow flexed 45 degrees, you were talking about the relative angle.

a

According to the right hand thumb rule, counterclockwise is ___

a. positive

b. negative

c. either depending on situation

d. none of the above

b

When converting from angular motion to linear motion, the angle needs to be in ___

a. degrees

b. radians

c. either a or be can work

c. neither a or b

radians/s, degrees/s

an acceptable unit for angular velocity is ___

30

a pendulum moved 20 degrees counterclockwise, then came back 10 degrees clockwise. it’s angular distance is ____degrees

10

a pendulum moved 20 degrees counterclockwise, then came back 10 degrees clockwise. its displacement is ___ degrees

false

true or false: in angular motion, there are 2 types of angular accelerations and one type of linear acceleration

centripetal

the ___ force is a real force that pulls objects toward the center of the circle

b

a taller runner is faster than a shorter runner assuming they are moving their legs at the same rate because

a. taller runner has greater angular velocity

b. taller runner has greater tangential velocity

c. either a or b

d. neither a or b

velocity, acceleration

in projectile motion, objects experience a constant ___ when moving horizontally and a constant ___ when moving vertically

c

the most important factor that influences horizontal distance of a projectile is __ of release

a. angle

b. relative height

c. speed

d. all of above are equally important

42-43

the optimal angle for a long jump is approximately __ degrees

true

true or false: in a unit circle, sin represents the vertical component, while cosine represents the horizontal component

false

true or false: air resistance has greater effect on a vertical jump compared to a long jump

d

audrey jumps to block a shot but mises, assuming up is positive and down is negative, her acceleration due to gravity is ___

a. positive on way up, negative on way down

b. negative on way up, positive on way down

c. positive on way up and down

d. negative on way up and down

true

true or false: when throwing an object upward, velocity at peak height will always be 0

uniform acceleration

we should not call them projectile motion equations, _____ motion equations is a much better term

d

the only variable that relates horizontal information to vertical information in a projectile is ___

a. acceleration

b. initial velocity

c. displacement

d. time

false

true or false: to produce more force during a concentric action, you need to contract your muscle as fast as possible

true

as the muscle (as a whole) lengthens, its ability to produce more force increases

eccentric

muscle actions that involve lengthening of the muscle as it attempts to actively contract are __ actions

a

all else being equal, a pennated muscle will produce __ force compared to a parallel muscle

a. greater

b. lesser

c. equal

d. any of the above can be true depending on the situation

a

quicker application of force during an eccentric action will lead to __ in force production

a. increase

b. decrease

c. no change

d. any of the above correct depending on the situation

c

to achieve maximum muscle power, you will need

a. max velocity, min force

b. min velocity, max force

c. avg velocity, avg force

d. power is not related to force and velocity

physiological cross-section area

PCSA stands for

false

true or false: muscle strains typically take place during concentric actions

neutralizer

during a hammer curl, the pronator teres acts as a _____

true

true or false: during a hammer curl, the triceps brachii is an antagonist

ma

according to newton’s 2nd law, F= ____

newton

the SI unit for force is the ___

d

which of the following is a non-contact force

a. gravity

b. air resistance

c. magnetic force

d. more than one of the above

false

true or false: static friction is always greater than dynamic friction

c

which of the following has no effect on friction

a. normal force

b. coefficient of friction

c. area of contact between objects

d. none of the above

decrease

as the angle of incline increases, friction will _____

inertia

mass quantifies ___

true

true or false: as the angle of incline increases, friction decreases

false

true or false: newton’s first law is a modified statement of newton’s third law

b

2 hocky players collide and become one body, this is an example of a ____

a. elastic collision

b. plastic collision

c. partially elastic and partially plastic

d. does not qualify as elastic or plastic

false

true or false: immediately after 2 hockey players collide and become one body, they will stop moving

time

change in momentum is not only dependent on how much force is applied but also how much ___

c

Kg m/s can be used to measure ___

a. impulse

b. momentum

c. both a and b

d. neither a or b

false

true or false: the units for impulse is N/s

false

true or false: a small object moving fast will always produce more force than a big object moving slow

1

in a perfectly elastic collision, the coefficient of restitution is equal to ____

a

in a plastic collision ___

a. momentum is conserved but energy is lost

b. momentum is lost but energy is conserved

c. momentum and energy are both conserved

d. momentum and energy are both lost

false

true or false: the coefficient of restitution can have a negative value

c

to achieve max jump height ___ at the instant of takeoff

a. both shoulders should be extended

b. one shoulder flexed 180 degrees and one extended

c. both shoulders flexed 180 degrees

d. both shoulders flexed 90 degrees

true

true or false: how high the center of mass moves in the air is under one’s control before takeoff but not after

b

once one is in the air, he/she can control ____

a. flight height, not reach height

b. reach height, not flight height

c. both a and b

c. neither a or b

true

true or false: increasing countermovement time is limited by the fact that it will end up hurting how much force one is able to produce

false

true or false: muscle spindles help produce more force when they are slowly stretched compared to following a quick stretch

a

to achieve max height to head a soccer ball, at the instant of impact with the ball

a. both shoulders should be extended

b. one shoulder flexed 180, other extended

c. both shoulders flexed 180

d. both shoulders flexed 90

b

the GRF shown in the image represents

a. squat up

b. squat down

c. either a or b depending on how fast one is moving

d. either a or b depending on what else the individual is doing

true

true or false: when acceleration is positive, the force will also be positive

b

which of the following is the best way to measure flight height of a vertical jump

a. the jump mat

b. takeoff impulse

c. the vertec

d. more than one of the abvoe

time

to lower impact force when landing you want to increase impact ____ during landing

a

concentric actions result from doing __ work

a. positive

b. negative

c. zero

d. any of above

true

true or false: the unit for work is the same as that for kinetic energy

velocity

kinetic energy is dependent on change in ___

potential

strain energy is a form of ___ energy

displacement

according to the work-energy relationship, to reduce impact during landing from a jump, you need to increase impact ___

potential, kinetic

when dropping a ball from a height, at the very top, the ball will have maximum ___ energy and zero ___energy

b

which of the following is the units for power

a. Js

b. J/s

c. Ws

d. W/s

c

you can calculate power by multiplying

a. force and time

b. force and displacement

c. force and velocity

d. force and impulse

false

true or false: individuals that can jump higher have more power than those that cannot jump as high

Fd

the sum of torques = ___

a

a centric force will cause ___

a. translation

b. rotation

c. a or b depending on situation

d. neither a or b

b

the SI unit for torque is ___

a. Ft lb

b. Nm

c. J

d. more than one of the above

true

true or false: muscle moment arm continuously changes throughout the ROM

b

lombard’s paradox is explained by ___

a. the rectus femoris has a longer moment arm at hip but not the knee

b. the rectus femoris has a longer moment arm at the knee, but not the hip

c. the rectus femoris has a longer moment arm at both the hip and knee

d. the rectus femoris has a shorter moment arm at both the hip and the knee

c

the most popular lever in the human body is the __ class lever

a. first

b. second

c. third

d. fourth

1st

a seesaw is an example of a ___ class lever

true

true or false: second class levers always have a mechanical advantage

false

true or false: equilibrium state and static equilibrium are different names for the same thing

false

true or false: in a non-weight bearing situation, ankle plantar flexion is an example of a third class lever