PE IGCSE chapter 1-5

What is the definition of a lever?

• An object used to help people gain mechanical advantage over other objects

• A rigid bar resting on a pivot, used to move a heavy or firmly fixed load with one end when pressure is applied to the other

• It is 3 points the load, effort and fulcrum which helps to make loads easier

• Have a fixed pivot point that helps to lift loads

What is a second class lever?

• Fulcrum in the middle

• Load in the middle

• Effort in the middle

• Pivot in the middle

When performing a header in football, what class lever is used?

• First class lever

• Second Class lever

• Third class lever

• Fourth class lever

A swimmer swims a 100m sprint, what are the applications of force applied to the swimmer?

• gravity, muscular force, air pressure

• muscular force, ground reaction force, gravity

• muscular force, air resistance, joint reaction force

• joint reaction force, muscular force, fluid resistance

newtons third law of motion states that

• if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force

• the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it

• For a body whose mass m is constant, it can be written in the form F = ma, where F (force) and a (acceleration) are both vector quantities

• when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction

On a starting block, the sprinter burst out of the block, the most relevant law towards the starting block and the sprinters feet are

• First law

• Second law

• Third law

• All of the above

On a starting block, the sprinter burst out of the block, the most relevant law towards the sprinter in the first 30m of the race is

• First law

• Second law

• Third law

• All of the above

On a starting block, the sprinter burst out of the block, the most relevant law towards the sprinters movement off the blocks is slower compared when the sprinter reaching maximum speed at the middle of the race

• First law

• Second Law

• Third Law

• All of the above

Cyclists are cycling in a straight line, based on the applications of force, why is this so?

• To reduce drag e.g. air resistance between the riders

• To improve motivation in the group

• To Increase acceleration between the riders

• To improve efficiency between the riders

There are a few methods of recovery, what are the few?

• sleep, eat, stretching

• cryotherapy, physiotherapy, diet

• Sufficient rest, hydration, RICE

• Foam rolling, cryotherapy, stretching