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:
21×60 mph×6 s
Before computing the whole thing do a bit of simplification,
21×60 mph×6 s=30 mph×6 s
Actually, 30 mph is the average speed for the journey of accelerating from rest to 60mph in 6s.
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:
21×60 mph×6 s
Before computing the whole thing do a bit of simplification,
21×60 mph×6 s=30 mph×6 s
Actually, 30 mph is the average speed for the journey of accelerating from rest to 60mph in 6s.