Angular Kinematics: Master Angular Motion in Biomechanics for Sport

Question 1

What is the SI unit of angular displacement?

Accepted Answer

Radian

Answer

Degree

Answer

Meter

Answer

Second

Question 2

The angular velocity of a rotating object is the rate of change of?

Accepted Answer

Angular displacement

Answer

Angular acceleration

Answer

Linear velocity

Answer

Linear acceleration

Question 3

Which of the following is the formula for angular acceleration?

Accepted Answer

α = Δω / Δt

Answer

ω = Δθ / Δt

Answer

a = Δv / Δt

Answer

v = Δx / Δt

Question 4

Which of the following describes uniform angular acceleration?

Accepted Answer

Angular acceleration is constant

Answer

Angular velocity is constant

Answer

Angular displacement is constant

Answer

Linear acceleration is constant

Question 5

What is the significance of angular kinematics in biomechanics for sport?

Accepted Answer

It helps analyze body movements and optimize techniques

Answer

It predicts muscle forces during physical activities

Answer

It determines the power output of athletes

Answer

It calculates the energy expenditure in sports

Question 6

What is the international standard unit for angular displacement?

Accepted Answer

Radian

Answer

Degree

Answer

Revolution

Answer

Hertz

Question 7

Identify the formula that defines angular acceleration.

Accepted Answer

α = dω/dt

Answer

α = ω/t

Answer

α = ωt

Answer

α = 2πf

Question 8

How are angular displacement, velocity, and acceleration interrelated?

Accepted Answer

ω = dθ/dt, α = dω/dt

Answer

θ = ω/t, α = ωt

Answer

θ = αt, ω = α/t

Answer

ω = α/t, θ = ωt

Question 9

How can angular kinematics enhance a runner's stride length?

Accepted Answer

Increasing angular velocity at the hip joint

Answer

Decreasing angular acceleration at the knee joint

Answer

Reducing angular displacement at the ankle joint

Answer

Maintaining constant angular velocity throughout the stride

Question 10

Which type of joint movement involves rotation around a lengthwise axis?

Accepted Answer

Rotation

Answer

Flexion-extension

Answer

Abduction-adduction

Answer

Circumduction

Question 11

Which factor does NOT influence the angular acceleration of a rotating object?

Accepted Answer

Angular displacement

Answer

Mass

Answer

Torque

Answer

Moment of inertia

Question 12

What is the standard international unit (SI unit) for angular displacement?

Accepted Answer

Radian

Answer

Degree

Answer

Second

Answer

Meter

Question 13

Which of these formulas accurately represents angular acceleration?

Accepted Answer

α = Δω / Δt

Answer

α = ω * t

Answer

α = r * ω

Answer

α = v / r

Question 14

A spinning object's angular velocity decreases. What does this indicate?

Accepted Answer

Retarding torque

Answer

Accelerating torque

Answer

Constant torque

Answer

No external torque

Question 15

Which graphical representation corresponds to angular displacement?

Accepted Answer

Displacement-angle graph

Answer

Position-time graph

Answer

Velocity-time graph

Answer

Acceleration-time graph

Question 16

A dancer completes two rotations in 5 seconds. Express their angular velocity in radians per second.

Accepted Answer

0.5 rad/s

Answer

0.25 rad/s

Answer

1 rad/s

Answer

2 rad/s

Question 17

An athlete performs a vertical jump, taking off and landing at the same height. Which of the following statements about the athlete's angular displacement during the jump is correct?

Accepted Answer

It is zero.

Answer

It is equal to the number of degrees rotated during the jump.

Answer

It is equal to the distance traveled during the jump.

Answer

It is equal to the average angular velocity during the jump.

Question 18

A swimmer performs a flip underwater. Which of the following best describes the swimmer's angular momentum during the flip?

Accepted Answer

It is conserved.

Answer

It increases.

Answer

It decreases.

Answer

It is not applicable in water.

Question 19

A figure skater spins on the ice with a constant angular velocity. Which of the following graphs best represents the skater's angular acceleration over time?

Accepted Answer

A horizontal line at zero

Answer

A sloping line

Answer

A sinusoidal curve

Answer

A parabolic curve

Question 20

A dancer leaps into the air and performs a double pirouette. Which of the following statements about the dancer's angular velocity throughout the pirouette is correct?

Accepted Answer

It changes both in magnitude and direction.

Answer

It remains constant.

Answer

It changes only in magnitude.

Answer

It changes only in direction.

Question 21

A gymnast swings on a high bar. At the bottom of the swing, the gymnast's angular velocity is at its maximum. What is the relationship between the gymnast's kinetic energy and potential energy at this point?

Accepted Answer

Kinetic energy is maximum, and potential energy is minimum.

Answer

Both kinetic and potential energy are at their maximum.

Answer

Kinetic energy is minimum, and potential energy is maximum.

Question 22

A runner's knee rotates through an angle of 30° in 0.5 seconds. What is the runner's angular velocity?

Accepted Answer

60°/s

Answer

120°/s

Answer

30°/s

Answer

180°/s

Question 23

A swimmer's arm moves with a constant angular acceleration of 5 rad/s². If the arm starts from rest, what is its angular velocity after 10 seconds?

Accepted Answer

50 rad/s

Answer

25 rad/s

Answer

100 rad/s

Answer

200 rad/s

Question 24

A dancer performs a pirouette with an initial angular velocity of zero. The dancer accelerates to a final angular velocity of 6 rad/s in 1.5 seconds. What is the dancer's average angular acceleration?

Accepted Answer

4 rad/s²

Answer

12 rad/s²

Answer

2 rad/s²

Answer

8 rad/s²