Newtons Laws of Motion
Which of the following motions in sports would describe linear motion only?
a. Football in the air as its thrown
b. Golf ball being struck by club
c. Track athlete competing in 100m dash
d. Track thrower competing in the hammer throw
c. Track athlete competing in the 100m dash
Which of the following is true regarding the angle of release of a projectile release from the same height at which it lands? As the angle increases, the distance the projectile will travel will..
a. Increase
b. Decrease
c. Unaffected
d. First increase, then eventually decrease
d. First increase, then eventually decrease
How will a surfer increase their stability to maintain balance on a surfboard?
a. base of support: wide, center of gravity: low
b. base of support: narrow, center of gravity: low
c. base of support: narrow, center of gravity:high
d. base of support: wide, center of gravity:high
a. base of support: wide, center of gravity: low
Which of the following is true regarding a runners velocity during a 200m run completed in 40 seconds?
a. average velocity would be less than 5 m/s at some point
b. average velocity would be exactly 8 m/s
c. instantaneous velocity at some point would be less than 5 m/s
d. instantaneous velocity for the entire run would be 5 m/s
c. instantaneous velocity at some point would be less than 5 m/s
Which of the following motions in sports would describe angular motion only?
a. Gymnast performing a swing on high bar
b. Basketball rolling across the court
c. Sprinter running down track
d. Soccer ball flying towards goal
a. Gymnast performing a swing on high bar
A gold drive typically leaves the ground at about 10-20 degrees above the horizontal. Why would these not be at 45 degrees?
a. Torque produced by the golf club is too high to control
b. Driving at 45 degree angle would cause them to overshoot the putting green
c. Backspin allows the ball to remain airborne longer due to lift
d. Governing bodies, such as the PGA or LIV regulate the shape of the clubs, preventing other angles of takeoff
c. Backspin allows the ball to remain airborne longer due to lift
Which of the following is a continuous skill?
a. completing a flip turn while swimming
b. strides by your legs while running
c. shooting a free throw in basketball
d. jumping onto a box
b. strides by your legs while running
Which of the following is true regarding a runner's velocity during a 400m run completed in 50 seconds?
a. average velocity would be exactly 8 m/s
b. average velocity would be greater than 8 m/s at some point
c. instantaneous velocity would be greatest when time equals 0
d. instantaneous velocity for the entire run would be 8 m/s
a. average velocity would be exactly 8 m/s
Performing squats more quickly results in...
a. Greater force output
b. Greater power output
c. Greater energy output
d. More atrophy of squat muscles
a. Greater force output
What is the typical ideal angle for a basketball shot?
a. 10-20 degrees
b. 30-40 degrees
c. 45 degrees
d. 50-60 degrees
d. 50-60 degrees
Which of the following is a discrete skill?
a. swinging a baseball bat at a pitch
b. pumping arms while running
c. flutter kick during freestyle swimming
d. dribbling a basketball
a. swinging a baseball bat at a pitch
According to the principle of summing forces, if all the forces caused by the biceps and other muscles acting to decrease the joint angle of the elbow total 10N, and the forces antagonizing the biceps total 4N, what are the net forces acting on the elbow?
a. 4N
b. 6N
c. 10N
d. 14N
b. 6N
Which of the following would be true regarding an ice skater spinning and bringing their arms closer to their chest.
a. Angular momentum: increase, angular velocity: increase, moment of inertia: constant
b. Angular momentum: constant, angular velocity: decrease, moment of inertia: increase
c. Angular momentum: constant, angular velocity: increase, moment of inertia: decrease
d. Angular momentum: decrease, angular velocity: constant, moment of inertia: increase
c. Angular momentum: constant, angular velocity: increase, moment of inertia: decrease
a. Sports are only played on earth where gravity does not vary
b. Gravity doesn't affect projectiles in sports
c. Gravity affects projectiles too irregularly to understand
d. Gravity is only relevant for projectiles in outer space
a. Sports are only played on earth where gravity does not vary
Which phase determines the accuracy and success of a movement?
a. preparatory
b. force production
c. critical instant
d. recovery
c. critical instant
An elite sprinter runs the 100m. They reach 50m in 6.47 seconds, and their velocity at this point is 11.5 m/s. They reach the finish in a time of 11.98 seconds, crossing the finish line with a velocity of 11.5 m/s. What can be deduced from this data?
a. The sprinter moves at a constant speed during the race
b. the sprinter reaches peak acceleration in the last 50m of the race
c. the sprinter moves at a constant speed in the last 50m of the race
d. the sprinter decelerates in the last 50m
c. the sprinter moves at a constant speed in the last 50m of the race
a. Longer arm would have greater linear speed measured at the hand
b. Shorter arm would have greater linear speed measured at hand
c. No difference in linear speed of two people
d. There is not enough data to answer
a. The longer arm would have the greater linear speed measured at the hand
Which of the following would not affect the path of a projectile (assuming no air resistance or spin)?
a. Mass of the projectile
b. Angle of projection
c. Take off velocity
d. Height of release
a. Mass of the projectile
A baseball pitch involves which phase after the ball is released?
a. critical instant
b. force production
c. recovery
d. follow through
c. recovery
An olympic swimmer reaches their fastest point in a race immediately prior to entering the water, and quickly decelerates. Their peak speed in the air is around 4 m/s. Their speed in the water slows to a maximum of 2.5 m/s. This deceleration takes about 3 seconds. What is the magnitude of their acceleration during this time?
a. 0.50 m/s^2
b. 0.83 m/s^2
c. 1.3 m/s^2
d. 1.5 m/s^2
a. 0.50 m/s^2