5.9 - Calculations

Calculate the area of a square with sides of 3cm each.

• 9cm^2
• 15cm^2
• 12cm^2
• 6cm^2

In a lever system, if the force in is 50N and the force out is 10N, what is the mechanical advantage?

• 0.2
• 2.5
• 5
• 0.5

What is the velocity ration of a gear system with 40 teeth on the driven gear and 20 teeth on the driver gear.

• 0.5
• 2
• 4
• 3

In a graph, what is the MEAN?

• The MEAN in a graph is the highest value.
• The MEAN in a graph is the lowest value.
• The MEAN in a graph is the average value.
• The MEAN in a graph is the total sum of all values.

In a graph, what is the MODE?

• The MODE is the highest value in the graph
• The MODE is the lowest value in the graph
• The MODE in a graph is the value that appears most frequently.
• The MODE is the average of all values in the graph

In a graph, what is the MEDIAN?

• The median is the value that occurs most frequently in the dataset.
• The median is the middle value when the data points are arranged in order.
• The median is the sum of all values divided by the number of values.
• The median is always the highest value in the dataset.

If I invest £10 over 5 months and it increases to £35, what is the percentage increase?

• 250%
• 200%
• 300%
• 150%

There are 2 resistors in series of 100Ω and 250Ω, what is the total resistance?

• 350Ω
• 200Ω
• 400Ω
• 150Ω

There are 2 resistors in parallel of 100Ω and 400Ω, what is the total resistance?

• 120Ω
• 200Ω
• 350Ω
• 80Ω

What is the formula for Ohm's law

• I = V/R
• V = IR
• I = R/V
• R = IV