Do this statement describe speed, velocity, distance or displacement:"I averaged $7 \mathrm{mph}$ during marathon"

 

Do this statement describe speed, velocity, distance or displacement:

"The snail crawled at $2{\mathrm{mms}}^{-1}$along the straight-line edge of a bench"

Do this statement describe speed, velocity, distance or displacement:

The sales representatives round trip was $420 \mathrm{km}$

A submarine uses sonar to measure the depth of water below it. Reflected sound waves are detected $0.40 \mathrm{s}$ after they were transmitted. How deep is the water.? Speed of sound in water=$1500 {\mathrm{ms}}^{-1}$

The earth takes one year to orbit the Sun at a distance of $1.5\times {10}^{11}m$. Calculate the speed. Explain why this is its average speed and not its velocity.

The displacement-time sketch graph in th figure represent the journey of a bus. What does the graph tell you about the journey?

Sketch a displacement - time graph to show your motion for the following event. You are walking at aconstant speed across a field after jumping off a gate, Suddenly you see a horse and stop. Your friend says there's no danger, so you walk on at a reduced constant speed. The horse neigh, and you run back to the gate. Explain how each section of the walk relates to a section of your graph.

 The Table shows the displacement of a racing car at different times as it travels along a straight track during a speed trial. Determine the car’s velocity.

 The Table shows the displacement of a racing car at different times as it travels along a straight track during a speed trial. 

 Draw the displacement-time graph and use it to find the car's velocity.