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A motorist travelling at u ms^-1 joins a straight motorway. On the motorway she travels with a constant acceleration of 0.07 m s2 until her speed has increased by 2.8 m s1. (a) Calculate the time taken for this increase in speed. (b) Given that the distance travelled while this increase takes place is 1050 m, find u. (OCR)

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A motorist travelling at u ms^-1 joins a straight motorway. On the motorway she travels with a constant acceleration of 0.07 m s2 until her speed has increased by 2.8 m s1.

A motorist travelling at u ms^-1 joins a straight motorway. On the motorway she travels with a constant acceleration of 0.07 m s2 until her speed has increased by 2.8 m s1.

A car starts from rest at the point A and moves in a straight line with constant acceleration for 20 seconds until it reaches the point B. The speed of the car at B is 30 m s. Calculate (a) the acceleration of the car, (b) the speed of the car as it passes the point C, where C is between A and B and AC = 40 m. (OCR)

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A car starts from rest at the point A and moves in a straight line with constant acceleration for 20 seconds until it reaches the point B.

A car starts from rest at the point A and moves in a straight line with constant acceleration for 20 seconds until it reaches the point B.