A-LevelPhysicsDynamics9702/12 · Oct/Nov 2014 · Q81 Mark

Water is pumped through a hose-pipe at a rate of 90 kg per minute. It emerges from the hose-pipe horizontally with a speed of 20 ms⁻¹. Which force is required from a person holding the hose-pipe to prevent it moving backwards?

A30 N

B270 N

C1800 N

D10 800 N

✓ Correct answer

A: 30 N

Oracle Prep sorts past-paper questions by topic, so you can drill Dynamics and see which topics are most likely to come up next.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

What is a statement of the principle of conservation of momentum for a system?

A force F is applied to a freely moving object. At one instant of time, the object has velocity v and acceleration a.…

The momentum of an object changes from 160 kg m s⁻¹ to 240 kg m s⁻¹ in 2 s. What is the mean resultant force on the o…

A fixed resistor of resistance 12 Ω is connected to a battery. There is a current of 0.20 A in the resistor. The curr…

Which measurements are taken in order to calculate the resistivity of the metal of a piece of wire?

A 12 V battery is charged for 20 minutes by connecting it to a source of electromotive force (e.m.f.). The battery is…