WorksheetsTopic 4.3 Sehs
Total questions: 23
Worksheet time: 31mins
Which levers have the effort and the load on the same side of the fulcrum?
I. First class lever II. Second class lever III. Third class lever
I and II only
I and III only
II and III only
I, II and III
Which illustrates Newton’s second law of motion during a baseball game?
The ball changes direction when hit by the bat due to an unbalanced outside force.
The ball exerts a force on the bat when hit in the opposite direction.
The distance the ball travels depends on the angle at which it is hit by the bat.
The ball accelerates from the bat in proportion to the velocity of the bat swing
The diagram shows elbow extension. Which type of lever is used?
First
Second
Third
No lever is used during elbow extension
The mass of a body being balanced in all directions defines which term?
Center of mass
Momentum
Fulcrum
Moment of inertia
What two components create power for athletes?
(a)
The diagram shows an athlete throwing a discus
Explain the concept of angular momentum when a figure skater spins on ice.
Using anatomical terminology, state the location of the cerebellum in relation to the cerebrum.
(a)
Identify two characteristics of a novice figure skater.
limited control, eg balance
Excels immediately
lacks efficiency / grace, effortful
Decides to quit after facing challenge of skating
Which is an example of a second-class lever?
The ankle joint during plantar flexion
The elbow during flexion
The knee during extension
The hip during abduction
Which of Newton’s laws predicts the increase in acceleration of the swing when a child uses a lighter baseball bat?
First
Second
Third
First and Second
Why does a diver use the tuck position?
To reduce spin by decreasing moment of inertia
To reduce spin by increasing moment of inertia
To increase spin by decreasing moment of inertia
To increase spin by increasing moment of inertia
. The diagram shows the lower leg. Identify the elements A, B and C of the lever system.
Outline how the Bernoulli principle affects a golf ball in flight
Apply Newton’s second law of motion to the distance travelled by a golf ball after being struck.
What is the relationship between angular momentum, angular velocity and moment of inertia?
Moment of inertia = angular velocity × angular momentum
Angular momentum = angular velocity ÷ moment of inertia
Angular velocity = moment of inertia ÷ angular momentum
Angular momentum = angular velocity × moment of inertia
What happens to the centre of mass when the basketball player prepares to shoot, moving from position A to position B?
Does not move
Moves upwards
Moves downwards
. Moves forwards
Which area around the golf ball has the highest air pressure?
W
X
Y
Z
Using an example, analyse conditions for acceleration.
Diagram A, shows a gymnast balanced on a beam. In Diagram B, she is about to fall. Explain how a fall can be avoided by moving the body and therefore the center of mass
The diagram shows the operation of a lever when rising up on the toes. What part of the lever is labelled X?
Fulcrum
Effort
Load
Resistance
What movement is shown in this diagram?
Adduction
Extension
Abduction
Flexion
The diagram shows a tennis ball in flight. The Bernoulli principle explains the difference in pressure around a spinning ball.
W
X
Y
Z
