9PE - Biomechanics

Identify which example of motion is a pushing force

• Rowing a canoe

• Performing a chin-up

• Kicking a ball

• Lifting a heavy object from the ground

Displacement is the movement of an object in a

• random direction

• specific direction

 $Velocity\ =\ \frac{Displacement}{Time}$  

In a 100 metre sprint event, a sprinter completes the race in 10.5 seconds. Calculate his velocity

• 10.5 m/s

• 10 m/s

• 9.5 m/s

• 9 m/s

What does 'zero acceleration' mean

• no change in velocity

• a rapid change in velocity

• increase in velocity

• decrease in velocity

Identify Newton's laws of motion

• The law of speed, The law of acceleration, The law of action and retraction

• The law of inertia, The law of velocity, The law of action

• The law of inertia, The law of acceleration, The law of action and reaction

• The law of speed, The law of velocity, The law of action

 $\frac{Force}{Mass}=Acceleration$  

Calculate the acceleration of the following: Force 200N and Mass 50kg

• 0.25

• 1

• 2

• 4

Identify the correct formula for calculating momentum

• momentum = mass x acceleration

• momentum = mass x velocity

• momentum = mass / velocity

• momentum = acceleration x velocity

The following diagram represents which leverage system

• First class lever

• Second class lever

• Third class lever

• Fourth class lever

The following digram represents which type of spin

• Topspin

• Backspin

• Nospin

• Sidespin

The diagram represents which of the following trajectory types

• High trajectory

• Parabolic trajectory

• Flat trajectory

• No trajectory