Physics Quiz

Which unit is an SI base unit?

• ampere

• coulomb

• degree Celsius

• gram

Which of the following could have the same units as force?

• energy

• distance

• momentum × distance

• energy

• time

The velocity of an object changes from an initial velocity u to a final velocity v. The vectors represent these velocities. Which single vector represents the change in velocity of the object?

• A

• B

• C

• D

An object is moving with initial velocity u. The object then moves with uniform acceleration a for time t until it reaches final velocity v. Which equation describes the motion of the object?

• u = v – 2at

• u = v – at

• v = u + at

• v = u + 2at

Which calculation produces a vector quantity?

• current × time

• final displacement – initial displacement

• done work

• 1/2 × mass × (speed)²

A thermometer can be read to an accuracy of ± 0.5 °C. This thermometer is used to measure a temperature rise from 40 °C to 100 °C. What is the percentage uncertainty in the measurement of the temperature rise?

• 0.5%

• 0.8%

• 1.3%

• 1.7%

The diagram shows the path of a golf ball. Which row describes changes in the horizontal and vertical components of the golf ball’s velocity when air resistance is ignored?

• constant deceleration constant acceleration downwards

• constant deceleration acceleration decreases upwards then increases downwards

• constant velocity constant acceleration downwards

• constant velocity acceleration decreases upwards then increases downwards

An aircraft flies from London to Sydney in a time of 21 hours 40 minutes. The distance travelled is 17 000 km. What is the average speed of the aircraft?

• 2.2 m s–1

• 2.2 × 10⁷ μm s–1

• 2.2 × 10¹¹ nm s–1

• 2.2 × 10⁶ mm s–1

A golf club hits a golf ball. The graph shows how the force F on the ball varies with time t. Which graph shows how the velocity v of the ball varies with time t?

• A

• B

• C

• D

What is meant by the mass and by the weight of an object on the Earth?

• its momentum divided by its velocity the work done in lifting it one metre

• the gravitational force on it the property that resists its acceleration

• the pull of the Earth on it its mass divided by the acceleration of free fall

• the property that resists its acceleration the pull of the Earth on it