Physics Quiz

How is speed defined?

• Change of velocity per unit time

• Change of displacement per unit time

• Change of distance per unit time

• Distance in a given direction

Describe the motion of car P from 0 to 6 seconds.

• Car P moves with constant velocity.

• Car P accelerates uniformly.

• Car P decelerates.

• Car P remains stationary.

Calculate the distance travelled by car P in the first 6 seconds.

• 54 m

• 120 m

• 87 m

• 33 m

Use the graph to identify the time at which both cars have the same velocity.

• 2 seconds

• 4 seconds

• 6 seconds

• 8 seconds

A girl kicks a football vertically upwards at time t = 0. Air resistance is negligible. What is the variation of the vertical component of velocity v of the football with t until it reaches the ground?

• A straight line with negative slope

• A triangle shape

• A semicircle shape

• A V shape

Which combination of an object's speed and journey time gives a distance travelled of 1 mm?

• 10 μm s⁻¹, 100 s

• 10 km s⁻¹, 0.01 μs

• 1 nm s⁻¹, 1 Gs

• 0.1 Mm s⁻¹, 100 ns

Which equation represents the final velocity (v) in terms of initial velocity (u), acceleration (a), and time (t)?

• v = u + at

• a = (v - u) / t

How is the displacement (s) calculated using initial velocity (u), final velocity (v), and time (t)?

• s = (u + v) / 2 * t

• v = u + at

A train accelerates at 1.25m/s² until it reaches a speed of 20m/s. What is the total time taken for the journey if it then travels at this speed for 1560m and decelerates at 2m/s² to stop?

• 26 seconds

• 78 seconds

• 104 seconds

• 180 seconds

What is the definition of acceleration?

• Acceleration is the speed of an object at a given moment.
• Acceleration is the rate of change of velocity per unit time.

• Acceleration is the change of velocity per unit time.

• Acceleration is the change of speed per unit time.