IB SEHS Topic 4.3

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?

The diagram shows an athlete throwing a discus

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

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.

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