IB Physics SL A.2 Forces and momentum questions

Exam-style multiple choice and written questions with full markschemes. Check multiple choice answers straight away, or type, photograph or draw a written answer and get it marked.

Type
Multiple choiceWritten
Difficulty
EasyMediumHard

Question 1

Paper 2Medium6 marks

A trolley of mass 24 kg24\ \mathrm{kg} is pulled horizontally along a level track by a rope. The rope exerts a forward force of 48 N48\ \mathrm{N} while the track exerts a frictional force of 12 N12\ \mathrm{N} backwards. These forces remain constant for 4.0 s4.0\ \mathrm{s} At the start of this interval, the trolley is moving forwards at 1.5 m s−11.5\ \mathrm{m\,s^{-1}} Ignore any other horizontal forces.

The rope force is then reduced, and the trolley continues at constant velocity. The frictional force remains 12 N12\ \mathrm{N}

(a)

Calculate the trolley’s acceleration during the 4.0 s4.0\ \mathrm{s} interval.

[2]
(b)

Determine the trolley’s speed at the end of the 4.0 s4.0\ \mathrm{s} interval.

[1]
(c)

Using Newton’s first law, explain why the horizontal resultant force on the trolley is zero when it moves at constant velocity.

[1]
(d)

State the Newton’s third-law force pair corresponding to the frictional force exerted by the track on the trolley.

[2]

The best questions are still waiting

Unlock every question in this topic, then type, photograph or draw your answer and have it marked against the markscheme. Find out where you are dropping marks.

Unlock all questionsCompare Student and Student Plus