Skip to content

Course home

Sign up

1.5 Forces

EasyMediumHard
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176
Question 174

A research submarine is descending vertically downwards through the water. Three vertical forces act on it.

The weight acts downwards and is equal to 18 000 N18\,000\text{ N}18000 N.

The buoyant force (upthrust) acts upwards and is equal to 15 000 N15\,000\text{ N}15000 N.

What is the water resistance force acting on the submarine when it is descending at a constant speed?

A

3 000 N3\,000\text{ N}3000 N upwards

B

3 000 N3\,000\text{ N}3000 N downwards

C

33 000 N33\,000\text{ N}33000 N upwards

D

33 000 N33\,000\text{ N}33000 N downwards

Markscheme

1.5 Forces Questions

  1. IGCSE
  2. /Physics
  3. /1.5 Forces

245 exam-style questions on CIE IGCSE Physics 1.5 Forces, covering 1.5.1a Forces, resultant force and motion, 1.5.1b Load–extension graphs and the spring constant, 1.5.1c Friction and drag, 1.5.1d Force, mass and acceleration, 1.5.1e Motion in a circular path, 1.5.2a Moment of a force, 1.5.2b Principle of moments and equilibrium, and 1.5.3 Centre of gravity and stability. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank