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Which of the following could be true for an object that moves 10 metres in a straight line in 2.5 seconds?

• The object had a constant acceleration of 4 ms^{-2}

• The object had a change of displacement of 25 m.

• The object had a constant velocity of 4 ms^{-1}

• The object had a constant displacement.

Which of the following displacement vs time graphs represents the motion of an object travelling with a constant non-zero acceleration?

• (A) [Graph: horizontal line]

• (B) [Graph: straight line with positive slope]

• (C) [Graph: straight line with negative slope]

• (D) [Graph: upward curve]

During which time did the object have the lowest speed?

• G

• A

• C

• D

How far has the vehicle travelled during the 8 seconds shown on the graph?

• 16 m

• 128 m

• 64 m

• -2 m

What is the average acceleration of the object between points A and B?

• –0.25 m·s⁻²

• –1.0 m·s⁻²

• –5.0 m·s⁻²

• 5.0 m·s⁻²

A train departs a station, starting from rest. 600 m down the straight track, the train is now travelling at 180 km h⁻¹. What was the train’s average acceleration during this time?

• 0.083 m s⁻²

• 0.30 m s⁻²

• 27 m s⁻²

• 2.1 m s⁻²

Car A is travelling east at 90 km h⁻¹ ahead of car B, which is also travelling east, but at 120 km h⁻¹, as shown. The velocity of car A relative to B is:

• 30 km h⁻¹ east

• 30 km h⁻¹ west

• 210 km h⁻¹ east

• 210 km h⁻¹ west

An object was thrown vertically upwards and travelled 30 metres upwards before returning to the ground. The object's initial velocity was approximately:

• 17 m.s⁻¹

• 24 m.s⁻¹

• 294 m.s⁻¹

• 588 m.s⁻¹

An escaped prisoner is escaping through the woods. As he approaches an open field, he accelerates at -1.7 m.s⁻² for 3 seconds to a new constant velocity of 2.9 m.s⁻¹. Calculate his initial running velocity.

• 5.1 m.s⁻¹

• -2.2 m.s⁻¹

• -5.1 m.s⁻¹

• 8.0 m.s⁻¹

Students used a ball dropping experiment to determine the acceleration due to gravity. The graph below shows the line of best fit they produced. Note that the axes do not include their scales. The students used the gradient (m) of the line of best fit to determine acceleration due to gravity (g). Which equation would the students then use to determine their value for gravity from the gradient?

• g = 2m

• g = m

• g = m/2

• g = 4m