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# Physics question? (suvat) UKCAT Watch

1. Explain to me how is accelerating from rest to 60mph in 6s is equivalent to moving at 30mph for 6s????

The QR on the UKCAT mock 1 is unbelievably hard!!
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3. (Original post by bobwibbles)
Explain to me how is accelerating from rest to 60mph in 6s is equivalent to moving at 30mph for 6s????

The QR on the UKCAT mock 1 is unbelievably hard!!
If you draw a graph of speed versus time for accelerating from rest to 60mph in 6s, you would get a straight line pass through the origin to 60 mph. The area under this graph is the distance travelled by the object in 6 s.

It is found by calculating the area of a triangle:

Before computing the whole thing do a bit of simplification,

Actually, 30 mph is the average speed for the journey of accelerating from rest to 60mph in 6s.
4. (Original post by Eimmanuel)
If you draw a graph of speed versus time for accelerating from rest to 60mph in 6s, you would get a straight line pass through the origin to 60 mph. The area under this graph is the distance travelled by the object in 6 s.

It is found by calculating the area of a triangle:

Before computing the whole thing do a bit of simplification,

Actually, 30 mph is the average speed for the journey of accelerating from rest to 60mph in 6s.
Ah makes sense. Thank you!

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Updated: September 18, 2016
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