Exercise Chapter 2 Physics Form 4

EXERCISE CHAPTER 2

1) Two Two masses of 5 kg and and 3 kg are connecte connected d to a rope which which passes passes over a frictionless pulley. Find the tension in the rope and acceleration of the 3kg mass when the 5 kg mass is released.

2) A 2 kg kg weight is connected connected y a rope to to a 3kg wooden wooden lock. The rope rope passes over a smooth pulley as shown. The weight is then released. Find the tension in the rope if a friction of 5 ! acts against the wooden lock.

3) Find the resultant resultant force for for the two two forces as shown shown on figure. figure.

1200

"!

12!

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#) A $ kg weight is suspended from a hook in the ceiling. A hori%ontal string pulls the supporting string so that the latter makes an angle of 5& & with the hori%ontal. Find the tension in oth strings.

T1 5&& ''''''''''''

T2

$ kg

5) A lamp of weight 25 ! is supported y two lamps. (iven the tension in rope A is 2& ! find a) The angle* ) The tension in rope +

,ope +

& Ө 3&

,ope A

25 ! $) A cartoon of mass 5kg is at rest at an inclined plane making an angle 15 & with the hori%ontal. Find the frictional force and the normal force acting on the cartoon.

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5 kg   friction

15& -mg

7) Ahmad and Ali are pulling a trolley on which their sister, ina is sitting "oth Ahmad and Ali pull the rope with a #orce o# $0 %, which ma&es an angle o# '0 o to the direction o# motion (# the total mass o# ina and trolley is '0 &g and the #riction etween the trolley and the *oor is +0 % hat is the a) otal #orces towards the le#t-

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) he acceleration o# ina and the trolley-

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