Mechanics Multiple Choice

One gram is equal to

• (A) 10 mg

• (B) 100 mg

• (C) 1 000 mg

• (D) 10 000mg

Which of the following quantities can be called SI Units?

I. Time

II. Speed

III. Displacement

• (A) I and II only

• (B) I and III only

• (C) II and III only

• (D) I, II and III

Which of the following is the SI Unit for current?

• (A) Volt

• (B) Ohm

• (C) Ampere

• (D) Coulomb

Item 3 refers to the following measuring cylinder which is used to determine volume of a liquid.

• (A) 7.0 cm³

• (B) 7.5 cm³

• (C) 7.8 cm³

• 8.0cm³

• (A) m²

• (B) m³

• (C) kg/m²

• (D) kg/m³

The graph shows how the displacement of a runner from a starting line varies with time. From the graph it can be deduced that the runner is

• (A) going slower and slower

• (B) going at a steady speed

• (C) going faster and faster

• (D) not moving

The following graph shows a velocity vs time graph for a moving object. Which of the following statements about the object are true?

I. It returns to its starting point.

II. It has zero acceleration between times t₂ and t₃?

III. Its velocity at t₄ is the same as its initial velocity.

• (a) I and II only

• (B) I and III only

• (C) II and III only

• (D) I, II and III

Linear Momentum is

• (A) the product of mass and acceleration

• (B) the product of mass and velocity

• (C) measured in newton-metres

• (D) measured in kilograms per metre

Which of the following is a vector quantity?

• (A) Mass

• (B) Density

• (C) Speed

• (D) Momentum

Acceleration can be described as the rate of change of

• (A) velocity

• (B) energy

• (C) momentum

• (D) displacement