Assessment Test 1 - Section 1: General Physics (40 Questions)

Which of the following is an SI base unit?

• Volt

• Newton

• Kilogram

• Joule

What is the correct way to express 0.00000045 m in standard form?

• 4.5×10^7 m

• 4.5×10^−7 m

• 4.5×10^6 m

• 4.5×10^−6 m

Which instrument is used to measure the diameter of a thin wire most accurately?

• Metre rule

• Vernier caliper

• Micrometer screw gauge

• Measuring tape

A student measures the length of a pendulum to be 0.925 m. What is the precision of this measurement?

• To the nearest metre

• To the nearest centimetre

• To the nearest millimetre

• To the nearest tenth of a millimetre

Which of the following is a scalar quantity?

• Force

• Velocity

• Acceleration

• Energy

What is the density of an object with a mass of 300 g and a volume of 120 cm^3?

• 0.4 g/cm^3

• 2.5 g/cm^3

• 180 g/cm^3

• 420 g/cm^3

A car travels at a constant speed of 15 m/s for 20 seconds. How far does it travel?

• 0.75 m

• 15 m

• 300 m

• 3000 m

Which graph represents an object accelerating at a constant rate?

• Distance-time graph with a straight line.

• Speed-time graph with a horizontal line.

• Speed-time graph with a straight line sloping upwards.

• Distance-time graph with a horizontal line.

What is the acceleration of an object that changes its velocity from 5 m/s to 25 m/s in 4 seconds?

• 20 m/s^2

• 5 m/s^2

• 6.25 m/s^2

• 7.5 m/s^2

According to Newton's First Law of Motion, an object will remain at rest or in uniform motion unless acted upon by:

• Gravity

• Air resistance

• An unbalanced force

• Friction