CSEC Physics MCQ - 2020 May/June

The measurement of the external diameter of a measuring cylinder is MOST accurately done by using a

• metre rule

• tape measure

• length of string

• pair of vernier callipers

Given that force = mass x acceleration, the unit of force could be written as

• kg-¹ m s²

• kg m^-1 s²

• kg m^-1 s^-2

• kg m s^-2

0.0000462 N expressed in standard form is

• 4.62 x 1^-5 N

• 4.62 x 1^-4 N

• 462 x 1^-4 N

• 4.62 x 1⁵ N

The mass of an astraunaut is 70 kg when standing of the moon.

When he returns to earth, his approximate weight will be

• 70 kg

• 70 N

• 420 kg

• 700 N

The moment of force is defined as the

• moment in time when a force is first applied to a body

• length of time for which a force is applied

  to a body

• product of the force and its perpendicular distance from the

  turning point to the force

• ratio of the force and its perpendicular distance from the turning point

The unit for momentum is

• kg s^-1

• kg m s^-1

• kg m s^-2

• N m

Which of the following remains unchanged changed wished with an increase in

temperature

• mass

• density

• volume

• relative density

A 4 kg mass is traveling with a constant speed of 5 m s^-1. It is brought to rest in 2 seconds. The average acting on the mass to bring it to rest

• 1.6 N

• 2.5 N

• 10.0 N

• 40.0 N

Which of the following measures may be classified as scalar quantity.

i. Time

ii. Speed

iii. Displacement

• i and ii only

• i and iii only

• ii and iii only

• i, ii, and iii

The graph shows how the displacement of a runner from a starting time varies with time. This runner is

• going slower and slower

• going at a steady speed

• going faster and faster

• not moving