Year 11 Mechanics 2 Topic 1.51-1.55

A piece of card has its centre of mass at M.
Which diagram shows how it hangs when suspended by a thread? 

• A
• B
• C
• D

Two men jump out of an aeroplane at the same time. One of the men opens his parachute and the other man remains in free-fall. Why is the man in free-fall moving faster than the parachutist? 

• The man in free-fall experiences greater air resistance.
•  The man in free-fall has a greater mass.
• The parachutist experiences greater air resistance.
• The parachutist has not reached terminal velocity. 

A passenger is sitting in an aeroplane, which takes off and climbs to 10 000 m.
During this time, what happens to the mass and to the weight of the passenger? 

• A
• B
• C
• D

A wooden trapdoor is hinged along one side and, when closed, is supported on the other side by a ledge. 
When the trapdoor is closed, the ledge exerts an upward force of 15 N on the trapdoor.  The gravitational field strength is 10 N / kg.
What is the mass of the trapdoor?

• 1.5kg
• 3.0kg
• 30kg
• 150kg 

An experiment is carried out to measure the extension of a rubber band for different loads. The results are shown in the image.
Which figure is missing from the table? 

• 16.5
• 17.3
• 17.4
• 18.3

A spring is stretched by hanging a piece of metal from it. 
What is the name given to the force that stretches the spring? 

• friction
• mass
• pressure
• weight

A student carries out an experiment to plot an extension / load graph for a spring. The diagrams show the apparatus at the start of the experiment and with a load added. 

• x
• y
• y+x
• y-x

Three horizontal forces act on a car that is moving along a straight, level road. 
Which combination of forces would result in the car moving at constant speed? 

• A
• B
• C
• D

A spring is suspended from a stand. Loads are added and the extensions are measured.

Which graph shows the result of plotting extension against load? 

• A
• B
• C
• D

A student uses a stand and clamp to hold a flask of liquid. Which diagram shows the most stable arrangement? 

• A
• B
• C
• D