Which formula?

Question: "A running race is 3000m long. Trevahn averaged a speed of 5ms-1. Calculate the time it would take for them to finish the race."

Which formula could you use to solve the problem?

• F=ma

• a = v/t

• v=d/t

• P=W/t

Question: "The surface area of the base of a kayak is 2 m2. When a 68kg person gets in the kayak how much pressure is exerted on the water?"

Which two formulae will you need to answer this question?

• v=d/t

  a=v/t

• I don't know

• F=mg

  P=F/A

• W=Fd

  P=W/t

The gradient of a distance vs time graph gives you:

• none of the above

• acceleration

• distance

• velocity (speed)

To calculate the gradient of a distance vs time slope:

• rise/run

• y/x

• all of these

The gradient of a speed vs time graph gives you:

• distance

• acceleration

• time

• speed

The area under the curve of a distance vs time graph gives you:

• time

• distance

• acceleration

• it gives you nothing

The area under a speed vs time graph gives you:

• time

• velocity

• distance

• acceleration

Which is the correct formula to calculate the area of a triangle?

• area = bh/2

• area = bh

• area = 2 x bh

• none of the above

A force diagram illustrating acceleration would have:

• equal sized arrows representing thrust and drag

• the thrust arrow longer than the drag arrow

• the drag arrow longer than the thrust arrow

• no arrows for thrust or drag forces

A force diagram representing constant motion would have:

• equal size arrows for thrust and drag

• thrust arrow longer than drag arrow

• drag arrow longer than thrust arrow

• no arrows for thrust or drag